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Articles de revues sur le sujet « Nautilidae »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 31 juillet 2024

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1

Wang, Yanna, Xingran Wang, Junkui Li, Xin Tong, Guiqi Bi et Ying Han. « The complete mitochondrial genome of Nautilus pompilius (Nautiloids : Nautilidae) ». Conservation Genetics Resources 10, no 3 (18 août 2017) : 437–40. http://dx.doi.org/10.1007/s12686-017-0843-9.

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Barord, Gregory J., David J. Combosch, Gonzalo Giribet, Neil Landman, Sarah Lemer, Job Veloso et Peter D. Ward. « Three new species of Nautilus Linnaeus, 1758 (Mollusca, Cephalopoda) from the Coral Sea and South Pacific ». ZooKeys 1143 (25 janvier 2023) : 51–69. http://dx.doi.org/10.3897/zookeys.1143.84427.

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Nautiloids are a charismatic group of marine molluscs best known for their rich fossil record, but today they are restricted to a handful of species in the family Nautilidae from around the Coral Triangle. Recent genetic work has shown a disconnect between traditional species, originally defined on shell characters, but now with new findings from genetic structure of various Nautilus populations. Here, three new species of Nautilus from the Coral Sea and South Pacific region are formally named using observations of shell and soft anatomical data augmented by genetic information: N. samoaensissp. nov. (from American Samoa), N. vitiensissp. nov. (from Fiji), and N. vanuatuensissp. nov. (from Vanuatu). The formal naming of these three species is timely considering the new and recently published information on genetic structure, geographic occurrence, and new morphological characters, including color patterns of shell and soft part morphology of hood, and will aid in managing these possibly endangered animals. As recently proposed from genetic analyses, there is a strong geographic component affecting taxonomy, with the new species coming from larger island groups that are separated by at least 200 km of deep water (greater than 800 m) from other Nautilus populations and potential habitats. Nautilid shells implode at depths greater than 800 m and depth therefore acts as a biogeographical barrier separating these species. This isolation, coupled with the unique, endemic species in each locale, are important considerations for the conservation management of the extant Nautilus species and populations.
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Wani, Ryoji, Roberto S. P. de Ocampo, Yolanda M. Aguilar, Maybellyn A. Zepeda, Yukito Kurihara, Kyoko Hagino, Hiroki Hayashi et Tomoki Kase. « First discovery of fossil Nautilus pompilius Linnaeus, 1758 (Nautilidae, Cephalopoda) from Pangasinan, northwestern Philippines ». Paleontological Research 12, no 1 (avril 2008) : 89–95. http://dx.doi.org/10.2517/1342-8144(2008)12[89:fdofnp]2.0.co;2.

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Evans, David H., et Andy H. King. « ‘Cenoceras islands’ in the Blue Lias Formation (Lower Jurassic) of West Somerset, UK : nautilid dominance and influence on benthic faunas ». Fossil Imprint 75, no 1 (1 août 2019) : 108–19. http://dx.doi.org/10.2478/if-2019-0009.

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Abstract Substantial numbers of the nautilid Cenoceras occur in a stratigraphically limited horizon within the upper part of the Lower Jurassic (Sinemurian Stage) Blue Lias Formation at Watchet on the West Somerset Coast (United Kingdom). Individual nautilid conchs are associated with clusters of encrusting organisms (sclerobionts) forming ‘islands’ that may have been raised slightly above the surrounding substrate. Despite the relatively large numbers of nautilid conchs involved, detailed investigation of their preservation suggests that their accumulation reflects a reduction in sedimentation rates rather than an influx of empty conches or moribund animals. Throughout those horizons in which nautilids are present in relative abundance, the remains of ammonites are subordinate or rare. The reason for this unclear, and preferential dissolution of ammonite conchs during their burial does seem to provide a satisfactory solution to the problem.
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Zinsmeister, William J. « Unusual nautilid occurrence in the upper Eocene La Meseta Formation, Seymour Island, Antarctica ». Journal of Paleontology 61, no 4 (juillet 1987) : 724–26. http://dx.doi.org/10.1017/s0022336000029073.

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The presence of large numbers of phragmocones of Eutrephoceras and Aturia in an upper Eocene beach deposit of the La Meseta Formation on Seymour Island is the first known occurrence of beach-drifted accumulations of nautilid shells in the fossil record and may also represent the first documentation of a mass stranding of nautilids in the Cenozoic.
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Aisyah, Siti, Josaphat Tetuko Sri Sumantyo, Aditya Pamungkas, M. Rizza Muftiadi et Muh Yusuf. « A Preliminary Study : Marine Biogeography of Nautilus in the Bangka Belitung Seas, Indonesia ». ILMU KELAUTAN : Indonesian Journal of Marine Sciences 26, no 3 (28 mai 2021) : 147–54. http://dx.doi.org/10.14710/ik.ijms.26.3.147-154.

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Nautilus is the only surviving genus whose members were numerous and widely dispersed in the oceans throughout the Jurassic and Miocene times. It represents the only living member from the Family Nautilidae and is often considered as a living fossil. Nautilus is found with high biodiversity in Ambon, Indonesia, and were in special cases even found in Bangka Belitung, far from their original habitat. This study aimed to understand the historical component of the habitat and distribution of Nautilus in Bangka Belitung and to determine the depth, temperature, current, and environmental heterogeneity relate to Nautilus. Nautilus samples were found in Bangka Belitung Seas nearby a crack region at 50–75 m deep while the optimal depth of the Nautilus was 150–300 m, depending on the local area. The locations in the Bangka Belitung Seas where Nautilus found have sea surface temperatures between 30-31°C and 27-28°C during the East Monsoon and the West Monsoon respectivelly. The implications of temperature as a limiting factor are fairly significant, as it restricts the upper limit of the living habitat to predictable depths, which vary both geographically and seasonally during the West Monsoon when surface temperatures approach habitable levels. Sea currents at the Bangka Belitung Seas move at 0–0.6 m.s-1 during the East Monsoon and speed up near the North Natuna Sea. During the West Monsoon, currents predominantly flow from the Natuna Sea to the Java Sea at 0–0.5 m.s-1. Large-scale deep-water currents and the effects of smaller currents on scent dispersal influence the directional movements of Nautilus.
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Leonova, T. B., et A. Yu Shedukhin. « New Nautilida from the Shakhtau Asselian-Sakmarian Reef Complex (Bashkortostan) ». Палеонтологический журнал, no 4 (1 juillet 2023) : 26–36. http://dx.doi.org/10.31857/s0031031x23040074.

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This paper describes new nautilids from the Shakhtau Asselian–Sakmarian reef complex. Their place in the nautilid system, which is still far from being completely understood, is discussed. Two species of two genera: Omorphoceras igori gen. et sp. nov. and Stenopoceras (Leptodomatoceras) bashkiricum subgen. et sp. nov. are assigned to the subfamily Domatoceratinae Miller et Youngquist, 1949, family Grypoceratidae Hyatt, 1900. The third, Foveroceras magnum gen. et sp. nov., is included in the exotic family Permoceratidae Miller et Collinson, 1953, which was previously considered monotypic and was known only from the Early Permian of Timor Island. The classification of the family Grypoceratidae is discussed, and the validity of the subfamily Domatoceratinae is questioned. The assumed phylogenetic relationship between the families Grypoceratidae and Permoceratidae is confirmed.
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Énay, Raymond, Charles Mangold, Yves Alméras et Geraint Wyn ap Gwilym Hughes. « The Wadi ad Dawasir “delta”, central Saudi Arabia : A relative sea-level fall of Early Bathonian age ». GeoArabia 14, no 1 (1 janvier 2009) : 17–52. http://dx.doi.org/10.2113/geoarabia140117.

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ABSTRACT The fluvial and deltaic deposits formerly described as the Wadi ad Dawasir “delta” have been reinterpreted on the basis of a new examination of biostratigraphic data, notably ammonites and brachiopods studied by the authors and nautilids studied by the late H. Tintant (the term “delta” as used in other documents is shown here in quotes because of insufficient evidence to confirm it as a true delta). Direct dating of the fluvial and deltaic deposits is not possible in the absence of age-indicative fossils, but the entire “delta” complex can be placed in the Lower Bathonian on the basis of Bathonian ammonite and brachiopod faunas found in underlying strata, and a Lower Bathonian nautilid found in the uppermost proximal beds. An Early Bathonian age of the “delta” revises the Middle Callovian age assumed by previous authors based on their admittedly lithostratigraphic correlation with marine strata of the Dhruma Formation. The Early Bathonian age is consistent with the alternative interpretation, which correlates the “delta” with the discontinuity in the marine sequence between units D5 and D6 of the Dhruma Formation, with a stratigraphic gap of Lower (in part) and Middle Bathonian. The nautilids and brachiopods from above and “apparently at the front” of the “delta” together with the ammonites, nautilids, brachiopods and calcareous nannoplankton from units D6 and D7, indicate a complete sequence from the Upper Bathonian (unit D6) to Upper Callovian (units T2 and T3 of the Tuwaiq Mountain Limestone) with transgressive overlap of the “delta” during Middle and Late Callovian. The Wadi ad Dawasir “delta” is here interpreted as resulting from a limited relative sea-level fall, causing progradation of a shelf deltaic wedge over the downlap surface associated with the D5–D6 discontinuity. Similar deltaic or/and paralic deposits have been described in the Lower Bathonian of northern Sinai, presumably of the same age, Negev and in the Bathonian of southern Tunisia, which indicate an event of wide extent (eustatic, climatic or tectonic) along the northern Gondwanan margin.
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Malchyk, Oksana, et Marcin Machalski. « First record of Epicymatoceras vaelsense (Nautilida) from the Maastrichtian white chalk of northern Denmark ». Bulletin of the Geological Society of Denmark 66 (22 novembre 2018) : 229–35. http://dx.doi.org/10.37570/bgsd-2018-66-14.

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The atypical Late Cretaceous nautilid Epicymatoceras vaelsense (Binkhorst van den Binkhorst, 1862) is described and illustrated on the basis of three specimens from the Maastrichtian white chalk of Denmark. One of these is probably from the lower/upper Maastrichtian boundary interval at Frejlev, while the other two originate from the uppermost Maastrichtian chalk as exposed in the Dania quarry; both localities are in Jylland, northern Denmark. These are first reports of E. vaelsense from Denmark; the species has previously been recorded from the uppermost Campanian and lower Maastrichtian of the Netherlands, Belgium, northern Germany and Poland. The presence of E. vaelsense in the topmost Maastrichtian white chalk in the Dania quarry is considered the youngest record of Epicymatoceras known to date, suggesting the persistence of the genus until the end of the Cretaceous. The diameter of the embryonic conch of the Danish E. vaelsense may be estimated at c. 30 mm, based on an individual from the Dania quarry, confirming earlier observations that the species possessed one of the largest embryonic conchs amongst Late Cretaceous nautilids.
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Wani, Ryoji, et Royal H. Mapes. « Conservative evolution in nautiloid shell morphology : Evidence from the Pennsylvanian nautiloid Metacoceras mcchesneyi from Ohio, USA ». Journal of Paleontology 84, no 3 (mai 2010) : 477–92. http://dx.doi.org/10.1666/09-158.1.

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Morphometric analyses of shell morphology in the Pennsylvanian nautiloid Metacoceras mcchesneyi Murphy, 1970 (Cephalopoda, Mollusca) recovered from coal mines in Madison Township, Columbiana County, Ohio, USA, reveal the ontogenetic change from hatching to maturity as well as intra-specific variation of shell morphology. The shell shape of M. mcchesneyi has isometric relationships, and the umbilicus diameter between umbilical shoulders has a positive allometric relationship with shell diameter. These show that the relative whorl shape was constant through the ontogeny, but the umbilicus became relatively broader with growth. The siphuncle position moved from a ventro-central position toward the center with growth until 420° of the total rotational angle had been attained. A constriction was recognized on the early whorl at 9.5 mm in shell diameter, and the interval angles of succeeding septa were changed at the 5th septum, indicating that hatching occurred at this diameter. The ventral apertural wall, the disappearance of ornamentation toward the last preserved aperture, and the last whorl separating from the previous whorl indicate that M. mcchesneyi attained maturity at ca. 70 mm in shell diameter. Most characteristics of shell morphology in M. mcchesneyi (the relative shell shape and ornamentation through ontogeny) are comparable to those in modern and younger fossil nautilids, irrespective of taxonomy and age, supporting the conclusion that evolutionary rates of shell morphology are conservative in nautilid history.
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Setiamarga, Davin H. E., Kazuki Hirota, Masa-aki Yoshida, Yusuke Takeda, Keiji Kito, Makiko Ishikawa, Keisuke Shimizu et al. « Hydrophilic Shell Matrix Proteins of Nautilus pompilius and the Identification of a Core Set of Conchiferan Domains ». Genes 12, no 12 (29 novembre 2021) : 1925. http://dx.doi.org/10.3390/genes12121925.

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Despite being a member of the shelled mollusks (Conchiferans), most members of extant cephalopods have lost their external biomineralized shells, except for the basally diverging Nautilids. Here, we report the result of our study to identify major Shell Matrix Proteins and their domains in the Nautilid Nautilus pompilius, in order to gain a general insight into the evolution of Conchiferan Shell Matrix Proteins. In order to do so, we performed a multiomics study on the shell of N. pompilius, by conducting transcriptomics of its mantle tissue and proteomics of its shell matrix. Analyses of obtained data identified 61 distinct shell-specific sequences. Of the successfully annotated 27 sequences, protein domains were predicted in 19. Comparative analysis of Nautilus sequences with four Conchiferans for which Shell Matrix Protein data were available (the pacific oyster, the pearl oyster, the limpet and the Euhadra snail) revealed that three proteins and six protein domains were conserved in all Conchiferans. Interestingly, when the terrestrial Euhadra snail was excluded, another five proteins and six protein domains were found to be shared among the four marine Conchiferans. Phylogenetic analyses indicated that most of these proteins and domains were probably present in the ancestral Conchiferan, but employed in shell formation later and independently in most clades. Even though further studies utilizing deeper sequencing techniques to obtain genome and full-length sequences, and functional analyses, must be carried out in the future, our results here provide important pieces of information for the elucidation of the evolution of Conchiferan shells at the molecular level.
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Machalski, Marcin, et Markus Wilmsen. « Taxonomy and taphonomy of Cenomanian (Upper Cretaceous) nautilids from Annopol, Poland ». Acta Geologica Polonica 65, no 4 (1 décembre 2015) : 495–506. http://dx.doi.org/10.1515/agp-2015-0021.

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Abstract A nautilid faunule of seven specimens, comprising Eutrephoceras bouchardianum (d’Orbigny, 1840), Cymatoceras deslongchampsianum (d’Orbigny, 1840), and Cymatoceras tourtiae (Schlüter, 1876) is described from a condensed middle Cenomanian interval at Annopol, Poland. C. tourtiae is recorded for the first time in Poland. The studied material consists of reworked phosphatised internal moulds of phragmocones, which may be of early or middle Cenomanian age, given the stratigraphic range of the associated ammonites. The nautilid moulds vary in inferred mode of infilling, and in intensity of abrasion, bioerosion and mineralisation. The sediment entered the phragmocones in two ways: 1) through punctures in the shell, the result of bioerosion or mechanical damage; 2) through siphonal openings by intracameral currents. In contrast to the fossil moulds from the Albian phosphorites of Annopol, which originated via direct precipitation of apatite around and/or inside fossils, the present nautilid moulds seem to have originated through secondary phosphatisation of the initially calcareous moulds. Diversity of taphonomic signatures in nautilid material from the middle Cenomanian interval at Annopol is compatible with the complex, multievent depositional scenario proposed for this level.
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Pérez-Rodríguez, Ileana, Jessica Ricci, James W. Voordeckers, Valentin Starovoytov et Costantino Vetriani. « Nautilia nitratireducens sp. nov., a thermophilic, anaerobic, chemosynthetic, nitrate-ammonifying bacterium isolated from a deep-sea hydrothermal vent ». International Journal of Systematic and Evolutionary Microbiology 60, no 5 (1 mai 2010) : 1182–86. http://dx.doi.org/10.1099/ijs.0.013904-0.

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A thermophilic, anaerobic, chemosynthetic bacterium, designated strain MB-1T, was isolated from the walls of an active deep-sea hydrothermal vent chimney on the East Pacific Rise at ° 50′ N 10 ° 17′ W. The cells were Gram-negative-staining rods, approximately 1–1.5 μm long and 0.3–0.5 μm wide. Strain MB-1T grew at 25–65 °C (optimum 55 °C), with 10–35 g NaCl l−1 (optimum 20 g l−1) and at pH 4.5–8.5 (optimum pH 7.0). Generation time under optimal conditions was 45.6 min. Growth occurred under chemolithoautotrophic conditions with H2 as the energy source and CO2 as the carbon source. Nitrate was used as the electron acceptor, with resulting production of ammonium. Thiosulfate, sulfur and selenate were also used as electron acceptors. No growth was observed in the presence of lactate, peptone or tryptone. Chemo-organotrophic growth occurred in the presence of acetate, formate, Casamino acids, sucrose, galactose and yeast extract under a N2/CO2 gas phase. The G+C content of the genomic DNA was 36.0 mol%. Phylogenetic analysis of the 16S rRNA gene sequence indicated that this organism is closely related to Nautilia profundicola AmHT, Nautilia abyssi PH1209T and Nautilia lithotrophica 525T (95, 94 and 93 % sequence identity, respectively). On the basis of phylogenetic, physiological and genetic considerations, it is proposed that the organism represents a novel species within the genus Nautilia, Nautilia nitratireducens sp. nov. The type strain is MB-1T (=DSM 22087T =JCM 15746T).
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Yacobucci, Margaret M. « Postmortem transport in fossil and modern shelled cephalopods ». PeerJ 6 (27 novembre 2018) : e5909. http://dx.doi.org/10.7717/peerj.5909.

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The chambered shells of cephalopod mollusks, such as modern Nautilus and fossil ammonoids, have the potential to float after death, which could result in significant postmortem transport of shells away from living habitats. Such transport would call into question these clades’ documented biogeographic distributions and therefore the many (paleo)biological interpretations based on them. It is therefore imperative to better constrain the likelihood and extent of postmortem transport in modern and fossil cephalopods. Here, I combine the results of classic experiments on postmortem buoyancy with datasets on cephalopod shell form to determine that only those shells with relatively high inflation are likely to float for a significant interval after death and therefore potentially experience postmortem transport. Most ammonoid cephalopods have shell forms making postmortem transport unlikely. Data on shell forms and geographic ranges of early Late Cretaceous cephalopod genera demonstrate that even genera with shell forms conducive to postmortem buoyancy do not, in fact, show artificially inflated biogeographic ranges relative to genera with non-buoyant morphologies. Finally, georeferenced locality data for living nautilid specimens and dead drift shells indicate that most species have relatively small geographic ranges and experience limited drift. Nautilus pompilius is the exception, with a broad Indo-Pacific range and drift shells found far from known living populations. Given the similarity of N. pompilius to other nautilids in its morphology and ecology, it seems unlikely that this species would have a significantly different postmortem fate than its close relatives. Rather, it is suggested that drift shells along the east African coast may indicate the existence of modern (or recently extirpated) living populations of nautilus in the western Indian Ocean, which has implications for the conservation of these cephalopods.
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Linzmeier, Benjamin J., Neil H. Landman, Shanan E. Peters, Reinhard Kozdon, Kouki Kitajima et John W. Valley. « Ion microprobe–measured stable isotope evidence for ammonite habitat and life mode during early ontogeny ». Paleobiology 44, no 4 (3 septembre 2018) : 684–708. http://dx.doi.org/10.1017/pab.2018.21.

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AbstractAmmonites have disparate adult morphologies indicative of diverse ecological niches, but ammonite hatchlings are small (~1 mm diameter), which raises questions about the similarity of egg incubation and hatchling life mode in ammonites. ModernNautilusis sometimes used as a model organism for understanding ammonites, but despite their outward similarities, the groups are only distantly related. Trends in ammonite diversity and extinction vulnerability in the fossil record contrast starkly with those of nautilids, and embryonic shells from Late Cretaceous ammonites are two orders of magnitude smaller than nautilid embryonic shells. To investigate possible environmental changes experienced by ammonite hatchlings, we used secondary ion mass spectrometry to analyze the oxygen and carbon isotope composition of the embryonic shells and early postembryonic whorls of five juveniles ofHoploscaphites comprimusobtained from a single concretion in the Fox Hills Formation of South Dakota. Co-occurring bivalves and diagenetic calcite were also analyzed to provide a benthic baseline for comparison. The oxygen isotope ratios of embryonic shells are more like those of benthic bivalves, suggesting that ammonite eggs were laid on the bottom. Ammonite shell immediately after hatching has more negative δ18O, suggesting movement to more shallow water that is potentially warmer and/or fresher. After approximately one whorl of postembryonic growth, the values of δ18O become more positive in three of the five individuals, suggesting that these animals transitioned to a more demersal mode of life. Two other individuals transition to even lower δ18O values that could suggest movement to nearshore brackish water. These data suggest that ammonites, like many modern coleoids, may have spawned at different times of the year. Because scaphites were one of the short-term Cretaceous–Paleogene extinction survivors, it is possible that this characteristic allowed them to develop a broader geographic range and, consequently, a greater resistance to extinction.
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Chirat, Régis. « Anomalies of embryonic shell growth in post-Triassic Nautilida ». Paleobiology 27, no 3 (2001) : 485–99. http://dx.doi.org/10.1666/0094-8373(2001)027<0485:aoesgi>2.0.co;2.

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No egg of any fossil nautiloid has yet been discovered. However, anomalies of embryonic shell growth, described for the first time in several Mesozoic Nautilida, provide important clues on morphology, structure, and size of their egg capsules; on the physical characteristics where egg laying occurred; and on the hatching processes. Roughness inside the inner egg capsule–caused by hard and uneven egg-laying substrate, locally and temporarily slowing down or stopping the apertural shell growth–could cause temporary deformations of growth lines. Such roughness, caused by stone, is described inside an egg capsule of Nautilus, which was fixed obliquely relative to the egg-laying substrate. This reduced the space between the inner and outer capsules, which locally fused together. The lateral-umbilical grooves, furrows, and deformations of growth lines were probably caused by the inner egg capsule during the prehatching stage. In fossil Nautilida, as in Nautilus, the size of this capsule was relatively small compared with the shell diameter at hatching. During the last stages of embryonic development, the shell extended backwards outside the egg capsule before hatching. This prehatching stage, during which the egg capsule continued to press against the shell, can be marked by a prehatching constriction. In fossil species, as in Nautilus, the inner capsule constituted a kind of “straitjacket” during the last stages of embryonic development. The expansion in whorl width at hatching, in normal as well as in abnormal shells, marks release of this straitjacket. Important deformations of the whorl section probably result from an abnormal form and size of the egg capsules mainly caused by the manipulations by the female during the egg laying on a hard and hollow substrate, increasing the straitjacket effect. An alternative explanation could be that the chorion did not expand adequately. From relatively early embryonic stages (approximately 180° adapical of the nepionic constriction) to hatching, both flaps of the hyponome could be turned backward under the shell, jammed between the inner wall of the egg capsule and the mantle margin, resulting in the formation of paired ventral parallel grooves. Many normal features of the embryonic development of nautiloids can be clarified through the study of the anomalies of embryonic shell growth.
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Dernov, Vitaly. « New finds of the Carboniferous cephalopods on the territory of Ukraine ». Visnyk of V.N. Karazin Kharkiv National University, series Geology. Geography. Ecology, no 55 (1 décembre 2021) : 72–81. http://dx.doi.org/10.26565/2410-7360-2021-55-05.

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Formulation of the problem. Carboniferous sediments are widespread in Ukraine. Cephalopods remains are not rare in these deposits. However, they are poorly studied. Cephalopods have great importance for the dismemberment and correlation of Carboniferous sediments, as well as for paleogeographic reconstructions. For this reason, their study is very relevant. The history of the study. Mississippian cephalopods of the Donets Basin and Don-Dnipro Downwarp are poorly studied. At the moment, few ammonoids and one nautilid have been determined from the Mississippian of the Don-Dnipro Downwarp. Numerous Mississippian ammonoids are known from the Donets Basin. Nautilids are known only from the Samara Formation (Lower Serpukhovian). Material and research methods. This article is based on the results of a study of Mississippian cephalopods collection from the Donets Basin (Ukraine: Grabove Village and Dokuchayivs’k in the south of the Donetsk Region) and the Don-Dnipro Downwarp (Ukraine: Sumy and Poltava Regions, Bugrovate and Gubs’ke Villages). In addition, allochthonous remains of cephalopods from the moraine of the Dnipro glacial maximum were studied (Ukraine: Poltava Region, Pyvykha Hill nearby Hradyzk Town). Statement of the main material. Orthocerids, oncocerid Culullus sp., actinocerid Antonoceras balaschovi Shimansky, nautilids Pseudostenopoceras sp. and Liroceras sp. have identified from the limestone boulders in the moraine of the Dnipro glacial maximum (Hradyzk). The age of these limestones from the Late Viséan to Serpukhovian. The geographical origin of the limestone debris can be determined by studying the fossils in these rocks. The results of the study of chaetetids and corals (Victor Ohar), brachiopods (Vladystav Poletaev) and cephalopods (author) show that the source of the limestone boulders with Carboniferous fossils situated in the southern part of the Moscow Syneclise. Fragments of conchs of the orthocerids Brachycycloceras scalare (Archiac et Verneuil) are occurred in the black mudstones of the Upper Viséan opened by the boreholes Bugrovativs’ka-160 (depth is 3650.0-3654.0 metres; Bugrovate Village, Okhtyrka District, Sumy Region) and Gubs’ka-2 (depth is 4740.0-4745.0 metres; Gubs’ke Village, Lubny District, Poltava Region). This species is known from the Namurian of Belgium, Viséan of the Czech Republic and Poland and Mississippian of Germany. The collection also contains a fragment of a large conch of actinocerid Rayonnoceras sp. This specimen comes from the limestone B81 of the Mezha Formation (Upper Viséan) exposed in the vicinity of the Grabove Village on the Kalmius River (Donetsk Region). This genus is very widespread in the Mississippian sediments of North America, Western Europe, European part of Russia and China. Previously actinocerids in the Carboniferous of the Donets Basin were not known. Fragments of conchs of indeterminate orthocerids find in the dark gray fine-crystalline Viséan limestones (Dokuchayivs’k, borehole no. 51, depth is 88.0 metres). Conclusions. The study of new finds of Carboniferous cephalopod remains in Ukraine allowed us to confirm the approximate location of the source of the clastic material of the Dnipro glacial maximum moraine. In addition, expand the systematic diversity of the Mississippian cephalopods of the Donets Basin and Don-Dnipro Downwarp.
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Leonova, T. B., et A. Yu Shedukhin. « New Nautilida from the Shakhtau Asselian–Sakmarian Reef Complex (Bashkortostan) ». Paleontological Journal 57, no 4 (août 2023) : 380–91. http://dx.doi.org/10.1134/s003103012304007x.

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Takai, Ken, Hisako Hirayama, Tatsunori Nakagawa, Yohey Suzuki, Kenneth H. Nealson et Koki Horikoshi. « Lebetimonas acidiphila gen. nov., sp. nov., a novel thermophilic, acidophilic, hydrogen-oxidizing chemolithoautotroph within the ‘Epsilonproteobacteria’, isolated from a deep-sea hydrothermal fumarole in the Mariana Arc ». International Journal of Systematic and Evolutionary Microbiology 55, no 1 (1 janvier 2005) : 183–89. http://dx.doi.org/10.1099/ijs.0.63330-0.

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A novel thermophilic, acidophilic bacterium, designated strain Pd55T, was isolated from a self-temperature-recording in situ colonization system deployed in a hydrothermal diffusing flow (maximum temperature of 78 °C) at the TOTO caldera in the Mariana Arc. Cells of strain Pd55T were motile, short rods with a single polar flagellum. Growth was observed between 30 and 68 °C (optimum growth at 50 °C; 120 min doubling time) and between (initial) pH 4·2 and 7·0 (optimum at pH 5·2). The isolate was a strictly anaerobic chemolithoautotroph capable of using molecular hydrogen as sole energy source and carbon dioxide as sole carbon source. Elemental sulfur served as the sole electron acceptor to support growth. The G+C content of the genomic DNA was 34·0 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the isolate was related to members of the genera Nautilia and Caminibacter, although it appeared to be a novel lineage prior to the divergence between Nautilia and Caminibacter. Strain Pd55T could also be differentiated from Nautilia and Caminibacter species on the basis of its physiological properties. It is, therefore, proposed that strain Pd55T (=JCM 12420T=DSM 16356T) represents the type strain of a novel species in a new genus, Lebetimonas acidiphila gen. nov., sp. nov.
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Souquet, Louise, Isabelle Kruta, Marjorie Roscian, Jérémy Andreoletti, Chloé Sirot, Raphaël Cornette, Hugo Dutel, Neil H. Landman, Anthony Herrel et Isabelle Rouget. « Nautilid beaks : unsuspected disparity and palaeoecological interpretation ». Lethaia 57, no 2 (20 juin 2024) : 1–19. http://dx.doi.org/10.18261/let.57.2.2.

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Dzik, Jerzy, et Andrzej Gaździcki. « The Eocene expansion of nautilids to high latitudes ». Palaeogeography, Palaeoclimatology, Palaeoecology 172, no 3-4 (août 2001) : 297–312. http://dx.doi.org/10.1016/s0031-0182(01)00304-2.

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Mujiono, Nova, et Putri Sapira Ibrahim. « Relationship of Cephalopods Orders Based on Morphological Characters ». Jurnal Kelautan Tropis 25, no 1 (7 janvier 2022) : 11–19. http://dx.doi.org/10.14710/jkt.v25i1.12246.

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Biodiversity is vital in our daily life. As a maritime country, Indonesian waters harbor many valuable animals such as Cephalopoda. Indonesian waters are rich in various species of cephalopods. Several previous studies on Indonesian cephalopods have been published, from the fishery aspect, only a few studies from the biological aspect. Information on their diversity is still scarce. It may because the low rate of knowledge delivery from the expert to the peoples. Specimen collection is the primary source to conduct a systematic study. The present study aims to introduce the knowledge of the morphologically based taxonomy of Cephalopoda. Using the museum specimen in MZB, we made an introduction on how to distinguish the six orders of Cephalopoda. Only good preserved specimens used. Because this study intended to introduce the morphology, the specimens dissected to show the buccal mass and funnel parts. We selected one species as a representative of each known orders. The morphology was photographed using a camera for the large body parts and using a microscope for the small body parts. A phenogram based on the eleven comparative morphologies is constructed. Three main branches were identified. Nautilida was separated because of the presence of external shell and arm without suckers. Two other branches were mainly grouped based on on the number of arms. Nautiloidea is consist of only Nautilida, a group whose bearing external coiled shell and arm without suckers. The other five orders are classified in Coleoidea, a group whose internal reduced shell and arm with suckers.
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Nikolaeva, Svetlana V., W. Bruce Saunders, Royal Mapes et A. Louise Allcock. « Case 3703Nautilus pompiliusLinnaeus, 1758 (Mollusca, Cephalopoda, Nautilida) : proposed designation of a neotype ». Bulletin of Zoological Nomenclature 72, no 4 (décembre 2015) : 274–85. http://dx.doi.org/10.21805/bzn.v72i4.a21.

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Bujtor, László, Hans-Jürgen Gawlick, Ákos Miklósy, Richárd Albrecht, Alex Kovács, Bertalan Makó, Dávid Maróti et Sigrid Missioni. « Az első kréta időszaki nautilida-előfordulás (Eutrephoceras ex gr. boissieri) a Mecsekből ». Földtani Közlöny 149, no 1 (14 avril 2019) : 19–24. http://dx.doi.org/10.23928/foldt.kozl.2019.149.1.19.

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Fieldwork around the lime-kilns at Zengővárkony (southern Hungary, eastern Mecsek Mts.) has led to the discovery of previously unknown beds of the Hidasivölgy Marl Formation. Based on bio- and lithostratigraphic considerations, here a Valanginian (Hauterivian?) age is assumed. This recently discovered section consists of thin-bedded, greybrownish turbiditic marls and limestones laid down in rhythmic alterations. Excavations of the marl beds have yielded a poorly-preserved, but rich cephalopod fauna. Furthermore, Eutrephoceras ex gr. boissieri has been identified here, and this is the first record of Cretaceous nautiloids from the Mecsek Mountains.
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Hewitt, Dr Roger. « Lost & ; Found : 213. London Clay nautiloids ». Geological Curator 5, no 6 (août 1991) : 231. http://dx.doi.org/10.55468/gc666.

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Dr Roger Hewitt (12 Fairfield Road, Eastwood, Leigh-on-Sea, Essex SS9 5SB) would like to hear from museums with London Clay nautilid specimens. He is undertaking both taxonomic and taphonomic studies and is particularly keen to see material from known localities and old collections....
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Tajika, Amane, Neil H. Landman, Mariah Slovacek, Kozue Nishida, Wataru Morita et James D. Witts. « Intra- and interspecific variability in offspring size in nautilids ». Lethaia 55, no 3 (13 septembre 2022) : 1–17. http://dx.doi.org/10.18261/let.55.3.1.

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Crick, Rex E., et E. S. Sobolev. « Perunautilus quadratus n. gen. et sp. (Cephalopoda, Nautilida) from the Triassic (Norian) of Central Peru ». Palaeontographica Abteilung A 233, no 1-6 (22 novembre 1994) : 161–67. http://dx.doi.org/10.1127/pala/233/1994/161.

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Steiner. « Nautical Matters : Hesiod's "Nautilia" and Ibycus Fragment 282 PMG ». Classical Philology 100, no 4 (2005) : 347. http://dx.doi.org/10.2307/3488446.

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Shchedukhin, A. Yu. « New Data on the Genus <i>Shikhanonautilus</i> ; (Liroceratidae, Nautilida) from the Early Permian Shakhtau Reef ». Палеонтологический журнал, no 5 (1 septembre 2023) : 26–30. http://dx.doi.org/10.31857/s0031031x23050082.

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The history of changing views on the on the taxonomy and classification of nautilids of the family Liroceratidae Miller et Youngquist, 1949 is briefly discussed. Based on a study of new material from the Asselian-Sakmarian deposits in the Shakhtau quarry, the diagnosis of the genus Shikhanonautilus Leonova et Shchedukhin is emended. A new species S. compressus is described and a more detailed characterization of the type species S. siphonoventralis Leonova et Shchedukhin is given.
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Tsujino, Yasuyuki, et Hirohide Iwata. « Aturoidea (Nautilida) from the Upper Cretaceous Sada limestone in Shimanto City, Kochi Prefecture, Japan ». Cretaceous Research 30, no 4 (août 2009) : 911–16. http://dx.doi.org/10.1016/j.cretres.2009.02.003.

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Shchedukhin, A. Yu. « New Data on the Genus Shikhanonautilus (Liroceratidae, Nautilida) from the Early Permian Shakhtau Reef ». Paleontological Journal 57, no 5 (25 septembre 2023) : 500–506. http://dx.doi.org/10.1134/s0031030123050088.

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Chevallier, Thierry, Henri Tintant et Raymond Enay. « Nautilidés d'âge kimméridgien dans le Jura Français : Conséquences stratigraphiques et paléogéographiques ». Geobios 20, no 6 (1987) : 713–23. http://dx.doi.org/10.1016/s0016-6995(87)80001-3.

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CHIRAT, RÉGIS, et MICHEL RIOULT. « Occurrence of early post-hatching Jurassic Nautilida in Normandy, France : palaeobiologic, palaeoecologic and palaeobiogeographic implications ». Lethaia 31, no 2 (29 mars 2007) : 137–48. http://dx.doi.org/10.1111/j.1502-3931.1998.tb00500.x.

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Engeser, Theo, et Ulrich Lehmann. « Eine neue Gattung der Familie LechritrochoceratidaeFlower 1950 (Nautilida, Cephalopoda) aus einem „mittelsilurischen“ Geschiebe von Norddeutschland ». Paläontologische Zeitschrift 68, no 3-4 (septembre 1994) : 313–19. http://dx.doi.org/10.1007/bf02991345.

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CHIRAT, RÉGIS, et HUGO BUCHER. « Shell microstructure and morphogenesis of the ornamentation in Cymatoceras Hyatt, 1883, Cretaceous Nautilida. Systematic implications ». Lethaia 39, no 1 (mars 2006) : 57–64. http://dx.doi.org/10.1080/00241160600582069.

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Baudouin, Cyril, Gérard Delanoy, Moreno-Bedmar Josep Anton, Pictet Antoine, Vermeulen Jean, Conte Gabriel, Gonnet Roland, Boselli Patrick et Boselli Marc. « Revision of the Early Cretaceous genera Heminautilus Spath, 1927, and Josanautilus Martínez & ; Grauges, 2006 (Nautilida, Cenoceratidae) ». Carnets de géologie (Notebooks on geology) 16, no 5 (14 avril 2016) : 61–212. http://dx.doi.org/10.4267/2042/58977.

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Schweigert, Günter. « An enigmatic nautilid from the Upper Jurassic Nusplingen Plattenkalk (SW Germany) ». Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 299, no 2 (26 février 2021) : 141–48. http://dx.doi.org/10.1127/njgpa/2021/0960.

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Miroshnichenko, M. L., S. L'Haridon, P. Schumann, S. Spring, E. A. Bonch-Osmolovskaya, C. Jeanthon et E. Stackebrandt. « Caminibacter profundus sp. nov., a novel thermophile of Nautiliales ord. nov. within the class ‘Epsilonproteobacteria’, isolated from a deep-sea hydrothermal vent ». International Journal of Systematic and Evolutionary Microbiology 54, no 1 (1 janvier 2004) : 41–45. http://dx.doi.org/10.1099/ijs.0.02753-0.

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A novel moderately thermophilic, microaerobic to anaerobic, chemolithoautotrophic bacterium, designated strain CRT, was isolated from a deep-sea hydrothermal vent site at 36°N on the Mid-Atlantic Ridge. Cells were Gram-negative, non-motile rods. The organism grew at 45–65 °C and pH 6·5–7·4, with optimum growth at 55 °C and pH 6·9–7·1. The NaCl range for growth was 5–50 g l−1 (optimum 30 g l−1). Strain CRT was an obligate chemolithoautotroph, growing with H2 as energy source, sulfur, nitrate or oxygen as electron acceptors and CO2 as carbon source. Hydrogen sulfide and ammonium were the respective products of sulfur and nitrate reduction. The G+C content of the genomic DNA was 32·1 mol%. Based on 16S rRNA gene sequence analysis, this organism was most closely related to Caminibacter hydrogeniphilus (94·9 % similarity). On the basis of phenotypic and phylogenetic data, it is proposed that the isolate represents a novel species, Caminibacter profundus sp. nov. The type strain is CRT (=DSM 15016T=JCM 11957T). The phylogenetic data also correlate well with the significant phenotypic differences between the lineage encompassing the genera Nautilia and Caminibacter and other members of the class ‘Epsilonproteobacteria’. The lineage encompassing the genera Nautilia and Caminibacter is therefore proposed as a new order, Nautiliales ord. nov., represented by a single family, Nautiliaceae fam. nov.
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GOOLAERTS, Stijn. « On the first Belgian record of the Eifelian (Middle Devonian) ammonoid cephalopod Subanarcestes (Suborder Anarcestina) ». Geologica Belgica 26, no 1-2 (31 août 2023) : 93–100. http://dx.doi.org/10.20341/gb.2023.004.

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Ammonoid cephalopods are extremely rare in the Lower and Middle Devonian sedimentary rocks of Belgium, which contrasts with the neighboring sedimentary basins. However, searches in old collections and recent collecting efforts show that ammonoids do occur in these beds in Belgium, which allows to enlarge our knowledge of Lower and Middle Devonian ammonoid occurrences. Here, a record of the Eifelian (Middle Devonian) anarcestid ammonoid genus Subanarcestes is described for the first time from Belgium based on a specimen from the Jemelle Formation (Chavées Member). This specimen was collected more than a century ago by Eugène Maillieux at Trou Bodet near Couvin. It laid unrecognized as an ammonoid cephalopod for many decades in the collections of the Royal Belgian Institute of Natural Sciences, while being previously identified as Cryptoceras or ‘Nautilus’ fossil, which if correct, constituted Belgium’s oldest Nautilida fossil. Micro-CT imaging greatly helped in the taxonomic assignment of the specimen.
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Ward, Peter D., et W. Bruce Saunders. « Allonautilus : a new genus of living nautiloid cephalopod and its bearing on phylogeny of the Nautilida ». Journal of Paleontology 71, no 6 (novembre 1997) : 1054–64. http://dx.doi.org/10.1017/s0022336000036039.

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Living ectocochliate cephalopods have long been thought to be restricted to a single genus, Nautilus Linnaeus, 1758, comprising five or six extant species. The shells of two species, N. scrobiculatus Lightfoot, 1786, and N. perforatus Conrad, 1847, are quite distinct, but no soft-parts were known until 1984, when N. scrobiculatus was seen alive for the first time. Dissections show that significant anatomical differences exist between N. scrobiculatus and other Nautilus species, including differences in gill morphology and details of the male reproductive system. These differences, along with phylogenetic analysis of extant and selected fossil nautiloid species, indicate that N. scrobiculatus, and N. perforatus should be distinguished from Nautilus as a newly defined genus, Allonautilus. This analysis contradicts previous phylogenies proposed for the Nautilida, which placed Nautilus as the last-evolved member of the order. We surmise that Allonautilus is a descendent of Nautilus, that the latter is paraphyletic, and first evolved in the Mesozoic, rather than in the late Cenozoic, as has been previously suggested.
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Chirat, Régis, et Michel Rioult. « Les reliefs des bordures de massifs anciens : des sites privilégiés de reproduction pour les Nautilida jurassiques ». Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 327, no 3 (août 1998) : 197–202. http://dx.doi.org/10.1016/s1251-8050(98)80008-6.

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CICHOWOLSKI, MARCELA, ALFREDO AMBROSIO et ANDREA CONCHEYRO. « Nautilids from the Upper Cretaceous of the James Ross Basin, Antarctic Peninsula ». Antarctic Science 17, no 2 (juin 2005) : 267–80. http://dx.doi.org/10.1017/s0954102005002671.

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To date, Cretaceous nautilids from the Antarctic Peninsula have received little attention and only a single species had been reported, Eutrephoceras simile Spath, from Seymour, Snow Hill, and James Ross islands. Currently, it is considered a synonym of Eutrephoceras subplicatum (Steinmann), which has also been described from the Upper Cretaceous of central Chile, southern Argentina and Angola. Here, we report and describe E. subplicatum in detail, based on specimens from the Lower Campanian–Maastrichtian of Vega, Seymour and James Ross islands, presenting, for the first time, embryonic conch features related to the palaeoecology of these organisms. The nauta of this species had a diameter of approximately 30 mm with 5–6 septa. In addition, we describe a new species, Eutrephoceras antarcticum, and one specimen assigned to the same genus in open nomenclature, both recovered from the Lower Campanian beds of James Ross Island.
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43

Kruta, Isabelle, Neil H. Landman et J. Kirk Cochran. « A New Approach for the Determination of Ammonite and Nautilid Habitats ». PLoS ONE 9, no 1 (27 janvier 2014) : e87479. http://dx.doi.org/10.1371/journal.pone.0087479.

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Landman, Neil H., Stijn Goolaerts, John W. M. Jagt, Elena A. Jagt-Yazykova, Marcin Machalski et Margaret M. Yacobucci. « Ammonite extinction and nautilid survival at the end of the Cretaceous ». Geology 42, no 8 (août 2014) : 707–10. http://dx.doi.org/10.1130/g35776.1.

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Tajika, Amane, et Christian Klug. « How many ontogenetic points are needed to accurately describe the ontogeny of a cephalopod conch ? A case study of the modern nautilid Nautilus pompilius ». PeerJ 8 (26 mars 2020) : e8849. http://dx.doi.org/10.7717/peerj.8849.

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Recent advancements in tomographic techniques allow for detailed morphological analysis of various organisms, which has proved difficult in the past. However, the time and cost required for the post-processing of highly resolved tomographic data are considerable. Cephalopods are an ideal group to study ontogeny using tomography as the entire life history is preserved within a conch. Although an increasing number of studies apply tomography to cephalopod conchs, the number of conch measurements needed to adequately characterize ontogeny remains unknown. Therefore, the effect of different ontogenetic sampling densities on the accuracy of the resultant growth trajectories needs to be investigated. Here, we reconstruct ontogenetic trajectories of a single conch of Nautilus pompilius using different numbers of ontogenetic points to assess the resulting accuracies. To this end, conch parameters were measured every 10°, 30°, 45°, 90°, and 180°. Results reveal that the overall patterns of reconstructed growth trajectories are nearly identical. Relatively large errors appear to occur where growth changes occur, such as the points of hatching and the onset of morphogenetic countdown before the attainment of maturity. In addition, a previously undocumented growth change before hatching was detected when measurements were taken every 10°, 30°, and 45°, though this growth change was obscured when fewer measurements were used (90° and 180°). The lower number of measurements also masks the subtle fluctuating patterns of conch parameters in middle ontogeny. We conclude that the measurements of a conch every 30° and 45° permit a reasonably precise description of conch ontogeny in nautilids. Since ammonoids were likely more responsive to external stimuli than to nautilids, a much denser sampling may be required for ammonoids.
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CHIRAT, RéGIS, et SIGURD VON BOLETZKY. « Morphogenetic significance of the conchal furrow in nautiloids : evidence from early embryonic shell development of Jurassic Nautilida ». Lethaia 36, no 3 (septembre 2003) : 161–70. http://dx.doi.org/10.1080/00241160310004602.

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NIKO, SHUJI, et ROYAL H. MAPES. « Trigonoceratid nautilids from the Early Carboniferous Imo Formation of Arkansas, Midcontinent North America ». Paleontological Research 11, no 3 (septembre 2007) : 293–303. http://dx.doi.org/10.2517/1342-8144(2007)11[293:tnftec]2.0.co;2.

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NIKO, SHUJI, et ROYAL H. MAPES. « Early Carboniferous trigonoceratid nautilids from the Pitkin Formation of Arkansas, Midcontinent North America ». Paleontological Research 9, no 3 (septembre 2005) : 233–41. http://dx.doi.org/10.2517/prpsj.9.233.

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Dernov, Vitaly. « Pseudogzheloceras—a new genus of Carboniferous nautilids (Cephalopoda) from Europe and North Africa ». GEO&BIO 2021, no 21 (30 décembre 2021) : 87–94. http://dx.doi.org/10.15407/gb2109.

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Analysis of morphology, stratigraphic and geographic distribution of the group of nautilid species, mainly from the Westphalian of Western Europe, and the Bashkirian and Moscovian of the Donets Basin (Eastern Ukraine) made it possible to establish a new genus Pseudogzheloceras Dernov, gen. nov. This genus includes tainoceratids with an evolute discoidal conch. The umbilical perforation is present. Cross section of the adult whorls is sub-square or almost rectangular. Surface ornamentation is represented by large transverse ribs on the flanks. Siphuncle is sub-central or is situated between the venter and the centre of the whorl (the position of the siphuncle is not known for the most species). Suture line has ventral, lateral and dorsal lobes; sometimes a lobe or saddle is present on the umbilical area. The new genus differs from the genus Gzheloceras by the sub-square or almost rectangular whorls cross section and coarser surface ornamentation. Pseudogzheloceras Dernov, gen. nov. is distinguished from the genus Parametacoceras Miller et Owen, 1934 (Pennsylvanian of North America, Westphalian of Western Europe, Moscovian of the Donets Basin and Moscow Syneclise) by the presence of transverse ribs on the flanks of the body chamber. The new genus includes the following species: Pseudogzheloceras costatum (Hind, 1905) comb. nov., Ps. falcatum (Sowerby in Prestwich, 1840) comb. nov., Ps. rotifer (Salter, 1864) comb. nov., Ps. postcostatum (Bisat, 1930) comb. nov., Ps. donetzense (Kruglov in Librovitch, 1939) comb. nov., Ps. orthocostatum (Kruglov in Librovitch, 1939) comb. nov., Ps. tacitum (Shimansky, 1957) comb. nov., and, possibly, Ps. maklai (Shimansky, 1967) comb. nov. These species had previously belonged to the genera Pleuronautilus, Metacoceras, Huanghoceras, and Gzheloceras. The new genus is known from the Westphalian of Western Europe and North Africa, Pennsylvanian of the Donets Basin and Moscow Syneclise, and possibly the Upper Pennsylvanian of the Fergana Depression. The research results have a great importance for studying the relationships between nautilid faunas of Carboniferous palaeobasins, as well as clarifying the taxonomy and phylogeny of non-ammonoid Carboniferous cephalopods.
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Shchedukhin, A. Yu. « New Early Permian Nautilids of the Family Rhiphaeoceratidae of the Shakhtau Reef (Bashkortostan) ». Paleontological Journal 56, no 6 (décembre 2022) : 601–5. http://dx.doi.org/10.1134/s0031030122060090.

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