Relevant bibliographies by topics / Protoconch

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Protoconch'

Author: Grafiati
Published: 3 June 2025
Last updated: 19 July 2025

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Journal articles on the topic "Protoconch"

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Nützel, Alexander, Jan Ove Ebbestad, Barbara Seuss, Axel Munnecke, Royal H. Mapes, and Alex G. Cook. "On Paleozoic platycerate gastropods." Zitteliana 97 (December 12, 2023): 29–51. http://dx.doi.org/10.3897/zitteliana.97.115688.

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The platycerate gastropods Orthonychia yutaroi Ebbestad, sp. nov. (Ordovician, Boda Limestone, Sweden), O. enorme (Silurian, Sweden, Gotland), O. parva (Pennsylvanian, Finis Shale Member, USA), and Orthonychia sp. (Mississippian, Imo Formation, USA) are studied including their protoconch morphology. Orthonychia yutaroi is the oldest known species in Orthonychia. Platycerates contain species with both, openly and tightly coiled protoconchs. This is the first report that tightly coiled protoconchs occur in Orthonychia. This and previously published observations blur the diagnostic difference bet
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Nützel, Alexander, Jan Ove Ebbestad, Barbara Seuss, Axel Munnecke, Royal H. Mapes, and Alex G. Cook. "On Paleozoic platycerate gastropods." Zitteliana 97 (December 12, 2023): 29–51. https://doi.org/10.3897/zitteliana.97.115688.

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The platycerate gastropods <i>Orthonychia yutaroi</i> Ebbestad, sp. nov. (Ordovician, Boda Limestone, Sweden), <i>O. enorme</i> (Silurian, Sweden, Gotland), <i>O. parva</i> (Pennsylvanian, Finis Shale Member, USA), and <i>Orthonychia</i> sp. (Mississippian, Imo Formation, USA) are studied including their protoconch morphology. <i>Orthonychia yutaroi</i> is the oldest known species in <i>Orthonychia</i>. Platycerates contain species with both, openly and tightly coiled protoconchs. This is the first report that tightly coiled protoconchs occur in <i>Orthonychia</i>. This and previously publishe
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Nützel, A., D. H. Erwin, and R. H. Mapes. "Identity and phylogeny of the late Paleozoic Subulitoidea (Gastropoda)." Journal of Paleontology 74, no. 4 (2000): 575–98. http://dx.doi.org/10.1017/s0022336000032728.

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The Subulitoidea have long been an enigmatic group of Paleozoic gastropods and share many characters of post-Paleozoic clades. Newly described protoconchs from several late Paleozoic subulitoid species have been employed in a phylogenetic analysis of the group. Late Paleozoic representatives, the Soleniscidae, are caenogastropods with an unornamented orthostrophic larval shell. The Meekospiridae have a smooth blunt protoconch of about two whorls. In contrast to previous interpretations, this protoconch is not heterostrophic or heterostrophy is not obvious. Therefore, a placement of the Meekosp
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Gofas, Serge, and Jean Louis Delemarre. "Notes on the protoconchs of Mediterranean and West African Cabestana specimens (Gastropoda: Ranellidae)." Iberus 34(2) (July 21, 2016): 103–8. https://doi.org/10.5281/zenodo.4603969.

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Well-preserved protoconchs of European and North African specimens of <em>Cabestana </em>are compared and illustrated. No appreciable difference was observed in protoconch mor - phology between a specimen of the usual Mediterranean morph of <em>Cabestana cutacea </em>(Linnaeus, 1767), and specimens of the Northwest African morph referred to as <em>Cabestana dolarium </em>(Linnaeus, 1767), therefore reinforcing the hypothesis that the two names are synonyms.
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Quintana, Cardona Josep, and Guillem X. Pons. "Some comments on the protoconch of Chondrula (Mastus) gymnesica Quintana, 2007 (Gastropoda: Enidae)." Spira 3, no. 1-2 (2009): 27–31. https://doi.org/10.5281/zenodo.8276192.

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Some comments on the protoconch of Chondrula (Mastus) gymnesica Quintana, 2007 (Gastropoda: Enidae). In this work, photographs of the embryonary whorls of Chondrula (Mastus) gymnesica Quintana, 2007 and Chondrula (Mastus) pupa (Linnaeus, 1758) (obtained by means of electron microscopy) are compared with the reconstruction of the embryonary whorls of Balearena gymnesica Altaba, 2007. These micrographs show that the protoconch of Ch. (M.) gymnesica is smooth and with no trace of ornamentation, i.e. completely different from the reconstruction published by Altaba (2007); in the latter, slightly d
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FERNANDES, MAURÍCIO ROMULO, and ALEXANDRE DIAS PIMENTA. "Taxonomic review of Inella and Strobiligera (Gastropoda: Triphoridae) from Brazil." Zootaxa 4613, no. 1 (2019): 1–52. http://dx.doi.org/10.11646/zootaxa.4613.1.1.

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The triphorid genera Inella and Strobiligera are historically considered to represent one or two distinct groups, with recent studies claiming that Strobiligera comprises species with paucispiral or multispiral protoconchs, whereas only species with paucispiral protoconch occur in Inella. The present study aims to update the taxonomy of Inella and Strobiligera (with paucispiral protoconchs) from Brazil. Three main groups are recognized: Inella s.s. and Strobiligera show a simultaneous emergence of the three spiral cords of the teleoconch, the former possessing a discrete nucleus and the latter
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Forli, Maurizio, Massimo Cresti, and Attilio Pagli. "Short note on the genus Aspella Mörch, 1877 (Gastropoda: Muricidae) in the Tuscan Pliocene with description of Aspella tusciae n. sp." Bollettino Malacologico 59, no. 1 (2023): 106–12. http://dx.doi.org/10.53559/bollmalacol.2022.23.

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A new species of the genus Aspella Mörch, 1877 (Gastropoda: Muricidae), Aspella tusciae n. sp., is here described from the Pliocene of Tuscany, Italy, to indicate a species with paucispiral protoconch often reported as A. anceps (Lamarck, 1822) or A. emmae (Boettger, 1902) by authors dealing with Mediterranean Pliocene assemblages. The European Neogene congeners A. emmae (Boettger, 1902), A. subanceps (d’Orbigny, 1852) and A. pacaudi Goret, Ledon &amp; Pons, 2013 are separated by their multispiral protoconch. The protoconch of A. sanfrae Novelli &amp; Gambarino, 1984 is unknown, but it is sepa
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Ebbestad, Jan Ove R., Dennis R. Kolata, and Mare Isakar. "New onychochilid mollusks from the Middle and Upper Ordovician of Baltica and Laurentia." Journal of Paleontology 95, no. 1 (2020): 106–22. http://dx.doi.org/10.1017/jpa.2020.81.

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AbstractA new sinistrally coiled univalved mollusk Catalanispira n. gen. is described with two species; Catalanispira reinwaldti (Öpik, 1930) from the Middle Ordovician Kõgekallas Formation (Darriwilian) of Estonia and Catalanispira plattevillensis n. gen. n. sp. from the Upper Ordovician Platteville Formation (Sandbian) of northern Illinois, USA. Morphological features include a large, low-trochiform shell, a narrow lenticular aperture, a deep funnel-like umbilicus, a falcate inner lip and a large (1.4 mm wide) protoconch. Ornamentation consists of fine commarginal growth lines or ribs but su
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Alba, David M., Mestre Glòria Guillén, Alonso Jordi Corbella, Ruestes Antoni Tarruella, and Pi Lluis Prats. "New morphological details on the shell of Sorholia lescherae (Boeters, 1981) (Gastropoda: Moitessieriidae)." Spira 4, no. 3-4 (2012): 173–78. https://doi.org/10.5281/zenodo.8277145.

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Here we describe additional details on Sorholia lescherae shell morphology. The shell measurements reported here fit well with those previously reported by other authors. However, we provide a more detailed conchological description of S. lescherae, including not only details on the teleoconch and protoconch microsculpture, but also a morphometric characterization of its shell. Overall, our results indicate that the genus cannot be further distinguished from Moitessieria on the basis of shell (either teleoconch or protoconch) microsculpture.
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Souza, Leonardo Santos de, Alexandre Dias Pimenta, and Cintia Miyaji. "A new species of Microcancilla from the southwestern Atlantic and notes on Microcancilla brasiliensis comb. nov. (Gastropoda, Cancellariidae)." Papéis Avulsos de Zoologia 61 (March 31, 2021): e20216129. http://dx.doi.org/10.11606/1807-0205/2021.61.29.

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Microcancilla phoenix sp. nov., collected from the Southeast and South coast of Brazil represents the southernmost record of the genus in the Atlantic Ocean. The new species differs from the other congeners of the Atlantic mainly by the presence of microscopic pustules covering the whole shell and by dimensions of the protoconch. “Axelella brasiliensis” Verhecken, 1991, known from the Northeast to South coast of Brazil, is transferred to Microcancilla based on a similar sculpture of microscopic pustules on the protoconch and on other features of the teleoconch discussed in the present study.
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Dissertations / Theses on the topic "Protoconch"

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Page, Alison Mary. "The origin of novelties in evolution: evolution of the protoconch II of planktotrophic gastropod larvae." Thesis, 2011. http://hdl.handle.net/1828/4966.

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My research tested hypotheses about the evolutionary origin of a novel feature by modification of development. The novelty is the growing larval shell of gastropod molluscs, which emerged when gastropod larvae acquired the ability to feed. One hypothesis states that the growing larval shell in the Heterobranchia is a continuation of the embryonic phase of shell secretion. The second hypothesis states that the larval shell in the Caenogastropoda may be a precocious juvenile shell. These hypotheses implicate heterochrony. To test these hypotheses, I examined ultrastructural features of the shell
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Books on the topic "Protoconch"

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Christiansen, Michaeol G., and Richard K. Stucky. Revision of the Wind River Faunas, Early Eocene of Central Wyoming. Part 15. New Nyctitheriidae (?Lipotyphla) with Analysis of the Relationships of North American Taxa. Denver Museum of Nature & Science, 2013. http://dx.doi.org/10.55485/xmjs8079.

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Among the fossilized remains of early Eocene mammals collected from the Buck Spring Quarries of Wyoming are the dentitions of several previously undescribed nyctitheriids. Comparison of this material (from the Lost Cabin Member of the Wind River Formation, late Wasatchian Land Mammal Age (LMA), Lost cabinian Land Mammal Subage (LMSA, Wa-7)) to closely related taxa requires the description of a new genus and species of nyctitheres, Acrodentis rosenorum, as well as a new species of Nyctitherium, N. krishtalkai. A. rosenorumis similar to closely related Nyctitherium and Leptacodon, but is set apa
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Book chapters on the topic "Protoconch"

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"protoconch, n." In Oxford English Dictionary, 3rd ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/6493446392.

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"protoconid, n." In Oxford English Dictionary, 3rd ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/9650109956.

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"protocone, n." In Oxford English Dictionary, 3rd ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/2379786096.

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Knudsen, J. "Observation on egg capsules and protoconchs of some marine prosobranch Gastropoda from Hong Kong." In The Marine Flora and Fauna of Hong Kong and Southern China V. Hong Kong University Press, 2000. https://doi.org/10.1515/9789882202191-015.

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Conference papers on the topic "Protoconch"

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Altier, Elizabeth B., Warren D. Allmon, Warren D. Allmon, Dana S. Friend, and Dana S. Friend. "REDEFINING PHYLOGENETIC RELATIONSHIPS IN FLORIDA'S PLIO-PLEISTOCENE TURRITELLINE GASTROPODS USING PROTOCONCH MORPHOLOGY AND GENETIC INVESTIGATION." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-322418.

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Anderson, Brendan M., Stephanie Sang, Stephanie Sang, et al. "PROTOCONCH ENLARGEMENT IN WESTERN ATLANTIC TURRITELLINE GASTROPOD SPECIES FOLLOWING THE CLOSURE OF THE CENTRAL AMERICAN SEAWAY." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-319174.

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Nassar, Islam, Munawar Hayat, Ehsan Abbasnejad, Hamid Rezatofighi, and Gholamreza Haffari. "Protocon: Pseudo-Label Refinement via Online Clustering and Prototypical Consistency for Efficient Semi-Supervised Learning." In 2023 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR). IEEE, 2023. http://dx.doi.org/10.1109/cvpr52729.2023.01120.

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You might also be interested in the extended bibliographies on the topic 'Protoconch' for particular source types:
Journal articles
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