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Journal articles on the topic 'Protoconch'

Author: Grafiati

Published: 3 June 2025

Last updated: 19 July 2025

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1

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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2

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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3

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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4

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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5

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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6

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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7

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 & Pons, 2013 are separated by their multispiral protoconch. The protoconch of A. sanfrae Novelli & Gambarino, 1984 is unknown, but it is sepa

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8

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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9

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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10

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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11

Colman, J. G., P. A. Tyler, and J. D. Gage. "Larval Development of Deep-Sea Gastropods (Prosobranchia: Neogastropoda) From The Rockall Trough." Journal of the Marine Biological Association of the United Kingdom 66, no. 4 (1986): 951–65. http://dx.doi.org/10.1017/s0025315400048554.

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The larval shell morphology of 14 species of neogastropod from the Rockall Trough, N.E. Atlantic has been examined using scanning electron microscopy. Mode of development has been interpreted from protoconch size and morphological features, from the ratio of protoconch diameter to number of larval whorls and by comparisons with confamilial or congeneric shallow-water neogastropods in which development is known. Eight species have non-planktotrophic and 6 have planktotrophic development. Food availability and feeding strategy are important factors in the development of the two different reprodu

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12

Costa, Paulo Márcio Santos, and Paulino José Soares de Souza. "Two new species of Mitrella Risso, 1826 (Gastropoda, Columbellidae) from West Atlantic." Iberus 19(2) (December 31, 2001): 15–21. https://doi.org/10.5281/zenodo.4514858.

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Two new species of <em>Mitrella </em>Risso, 1826 are described from the west Atlantic Ocean. <em>Mitrella cabofrioensis</em> sp. nov. is known only from the southeastern coast of Brazil. This species is diagnosed by its pattern of white flamules over a reddish brown background, and a domelike, paucispiral protoconch, with 2 whorls. <em>Mitrella antares</em> sp. nov. is know from the Bahamas, Cozumel island, and Brazilian coast. This species is diagnosed by its large, globose, multispiral protoconch, with 3 whorls, and by two strong denticles on the columella

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13

Oliver, Joan Daniel, and José Templado. "Dos nuevas especies del género Alvania (Caenogastropoda: Rissoidae) de las islas Baleares." Iberus 27(1) (June 30, 2009): 57–66. https://doi.org/10.5281/zenodo.4543952.

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Two new species of the genus <em>Alvania </em>from the Balearic Sea are described based on shell characters. The shell of one of them, <em>A. balearica </em>spec. nov., resembles that of <em>A. subcrenulata </em>and <em>A. nestaresi</em>, but it differs in the more turriculate outline and in some characters of the sculpture of the protoconch and teleoconch. The second one, <em>A. josefoi </em>spec. nov., is compared to the closely related <em>Alvania scabra </em>and <em>A. sculptilis</em>. It differs in being smaller, in the colour pattern of the shell and in some characters of the sculpture o

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14

Tanabe, Kazushige, and Yasuo Ohtsuka. "Ammonoid early internal shell structure: its bearing on early life history." Paleobiology 11, no. 3 (1985): 310–22. http://dx.doi.org/10.1017/s0094837300011611.

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Morphologic analysis was made on early whorls of two Paleozoic and 43 Mesozoic ammonoid species to obtain basic data on early life history. A positive linear relationship between protoconch and ammonitella sizes is recognized among the species examined. Total rotation angle of the ammonitella (ammonitella angle) seems to be independent of ammonitella size but has a significant negative linear relation with whorl expansion rate. This supports the model that the embryonic shell of ammonoids consists of gas-filled protoconch and the succeeding body whorl up to the primary varix. Growth analysis o

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15

Moreno, Diego, and José Templado. "El complejo de especies "Nassarius cuvierii - N. unifasciatus" (Gastropoda, Nassariidae) en el SE de España." Iberus 12(2) (June 30, 1995): 33–47. https://doi.org/10.5281/zenodo.4641398.

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At present, it is commonly accepted that the taxa <em>Nassarius costulatus </em>(Brocchi, 1814), <em>N. ferussaci </em>(Payraudeau, 1826), <em>N. cuvierii </em>(Payraudeau, 1826), <em>N. unifasciatus </em>(Kiener, 1835), and others belong to a single species, very common and variable. However, we have concluded that a species complex exist, because at least two different species of this complex are present in the coasts of SE Spain, <em>N. cuvierii </em>and <em>N. unifasciatus</em>. The protoconch, teleoconch, head-foot characters, radula, egg capsules and type of larval development have been

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16

NOLT, JAYA M. "A new species of Scissurella from the Azores with discussions on Sinezona semicostata Burnay & Rolan, 1990 and Sinezona cingulata (O.G. Costa, 1861) (Gastropoda: Vetigastropoda: Scissurellidae)." Zootaxa 1678, no. 1 (2008): 51. http://dx.doi.org/10.11646/zootaxa.1678.1.3.

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A new species of Scissurella d’Orbigny, 1824 from the Azores is described and compared to similar species from the eastern Atlantic and Mediterranean areas: Sinezona cingulata (O.G. Costa, 1861), Scissurella costata d’Orbigny, 1824, Sin. semicostata Burnay & Rolán, 1990, Sci. lobini (Burnay & Rolán, 1990) as well as two representatives from the Caribbean, Sin. confusa Rolán & Luque, 1994 and Sci. redferni (Rolán, 1996). The description and comparisons are based on shell and radula morphology examined by scanning electron microscopy. The species that are considered here are describe

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17

GEIGER, DANIEL L., and TAKENORI SASAKI. "New Scissurellidae and Anatomidae from Manazuru, Sagami Bay, and Okinawa, Japan (Mollusca: Gastropoda: Vetigastropoda)." Molluscan Research 29, no. 1 (2009): 1–16. http://dx.doi.org/10.11646/mr.29.1.1.

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Three new Scissurellidae and one new Anatoma (Anatomidae) are described from Cape Manazuru, Sagami Bay, and Okinawa, Japan. Sinezona costulata n. sp. from Sagami Bay has a protoconch with strong axial cords, the apertural varix is not connected to the embryonic cap, and the teleoconch sculpture is initially of strong axials, which are replaced on the shoulder at the apertural margin by fine spiral lines. Sinezona milleri n. sp. from Okinawa has a similar protoconch to S. costulata, and the teleoconch sculpture gives rise to a reticulate pattern at the apertural margin. The seven described and

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18

Anistratenko, Olga Yu., Klaus Bandel, and Vitaliy V. Anistratenko. "A new genus of patellogastropod with unusual protoconch from Miocene of Paratethys." Acta Palaeontologica Polonica 51, no. 1 (2006): 155–64. https://doi.org/10.5281/zenodo.13643663.

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Anistratenko, Olga Yu., Bandel, Klaus, Anistratenko, Vitaliy V. (2006): A new genus of patellogastropod with unusual protoconch from Miocene of Paratethys. Acta Palaeontologica Polonica 51 (1): 155-164, DOI: 10.5281/zenodo.13643663

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19

Rolán, Emilio, and Raúl Fernández-Garcés. "A new species of Cerithiopsis from Florida, USA (Prosobranchia, Cerithiopsidae)." Iberus 25(1) (June 30, 2007): 37–41. https://doi.org/10.5281/zenodo.4532585.

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A new species of <em>Cerithiopsis </em>from Florida, USA, is described. The new species is compared with others of brown color previously known from the Caribbean Sea. Shell, protoconch, radula and operculum are figured.

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20

Sawada, Naoto, Yusuke Fuke, Osamu Miura, Haruhiko Toyohara, and Takafumi Nakano. "Redescription of Semisulcospira reticulata (Mollusca, Semisulcospiridae) with description of a new species from Lake Biwa, Japan." Evolutionary Systematics 8, no. 1 (2024): 127–44. http://dx.doi.org/10.3897/evolsyst.8.124491.

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Semisulcospira Boettger, 1886 is a freshwater snail genus divergent in Lake Biwa, Japan. Although recent taxonomic studies of the genus have arranged taxonomic accounts of many species in the lake, our knowledge of morphological traits has still been insufficient in S. reticulata Kajiyama & Habe, 1961, which belongs to the S. niponica-group in the genus. Among the various habitats of the lacustrine species, in addition, the species richness of this group in coastal sandy mud areas of the lake has not been completely clarified. In this study, we revisited the taxonomic account of S. reticul

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21

ABSALÃO, RICARDO SILVA, FRANKLIN NOEL DOS SANTOS, and DEUSINETE DE OLIVEIRA TENÓRIO. "Five new species of Turbonilla Risso, 1826 (Gastropoda, Heterobranchia, Pyramidellidae) found off the northeast coast of Brazil (02º-13º S)." Zootaxa 235, no. 1 (2003): 1. http://dx.doi.org/10.11646/zootaxa.235.1.1.

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Five new species of Turbonilla are described from the Brazilian northern continental shelf. Turbonilla virgulinoi n. sp. from off Pernambuco State (690 m depth) is diagnosed by its semi-pyriform profile and sinuous axial ribs. Turbonilla megascymna n. sp. from off Paraíba State (750 m depth) is characterized by its fragile shell and relatively large planispiral protoconch. Turbonilla kamayura n. sp. from off Paraíba State (750 m depth) is diagnosed by its slightly conical shell with convex whorls without spiral sculpture and the helicoidal protoconch. Turbonilla mermeroglaphyra n. sp. from off

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22

Engl, Winfried, and Emilio Rolán. "Two new species of Putzeysia (Prosobranchia, Chilodontidae) from the Canary Islands." Iberus 27(2) (December 31, 2009): 93–98. https://doi.org/10.5281/zenodo.4546700.

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Two new species of the genus <em>Putzeysia </em>are described, showing the shell characters, including protoconch and microsculpture; the new species are compared with the only known Mediterranean species for the genus, <em>P. wiseri.</em>

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23

Rolán, E., and J. Espinosa. "La familia Cerithiopsidae H. y A. Adams, 1853 (Mollusca, Gastropoda), en la Isla de Cuba. 1.El género Retilaskeya Marshall, 1978." Publicações Ocasionais da Sociedade Portuguesa de Malacologia 16 (January 31, 1992): 39–43. https://doi.org/10.5281/zenodo.6643542.

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Sorne information on two cuban species from the family Cerithiopsidae is given, being included into the genus <em>Retilaskeya </em>Marshall, 1978: <em>R . bicolor</em> and <em>R. emersoni</em>. Their protoconch, operculum and radula are described

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24

DE SOUZA, PAULINO J. S. "A new bathyal Fasciolaria (Mollusca: Caenogastropoda) from the southwestern Caribbean." Zootaxa 49, no. 1 (2002): 1. http://dx.doi.org/10.11646/zootaxa.49.1.1.

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A new bathyal species of Fasciolaria is described for the southwestern Caribbean based on conchological characters. Fasciolaria tephrina sp. nov. is distinguishable from its west Atlantic congeners by its ashen white color, highly convex whorls, long thin siphonal canal, and large deviated protoconch.

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25

TEMPLADO, J., A. RICHTER, and M. CALVO. "Reef building Mediterranean vermetid gastropods: disentangling the Dendropoma petraeum species complex." Mediterranean Marine Science 17, no. 1 (2015): 13. http://dx.doi.org/10.12681/mms.1333.

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A previous molecular study has revealed that the Mediterranean reef building vermetid gastropod Dendropoma petraeum conforms a complex of at least four cryptic species with non-overlapping distribution areas. Once detected specific genetic differences, ‘a posteriori’ searching for phenotypic characters has been undertaken to differentiate cryptic species and to formally describe and name them. The name D. petraeum (Monterosato, 1884) should be restricted to the species of this complex distributed around the Central Mediterranean (type locality in Sicily). In the present work we redescribe this

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26

Tarruella, Ruestes Antoni, Alonso Jordi Corbella, Pi Lluis Prats, Mestre Glòria Guillén, and David M. Alba. "Una nova espècie de Moitessieria (Gastropoda: Moitessieriidae) del Forat de l'Or (Camarasa, la Noguera, Catalunya, Espanya)." Spira 4, no. 3-4 (2012): 109–19. https://doi.org/10.5281/zenodo.8277060.

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A new moitessieriid species, Moitessieria aurea sp. nov., is described based on shells collected at the cave Forat de l’Or, situated in the Pass of Terradets (Montsec Massif, la Noguera, Catalonia, Spain). It is a medium-sized species of Moitessieria with few whorls, characterized by a previously unknown combination of conchological features. The shell ornamentation is made of pits on the teleoconch and papillae on the protoconch. The Moitessieria species from this locality had been previously attributed to Moitessieria rolandiana, but it can be distinguished from the latter by numerous

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27

Sawada, Naoto, Yusuke Fuke, Osamu Miura, Haruhiko Toyohara, and Takafumi Nakano. "Redescription of Semisulcospira reticulata (Mollusca, Semisulcospiridae) with description of a new species from Lake Biwa, Japan." Evolutionary Systematics 8 (June 10, 2024): 127–44. https://doi.org/10.3897/evolsyst.8.124491.

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<i>Semisulcospira</i> Boettger, 1886 is a freshwater snail genus divergent in Lake Biwa, Japan. Although recent taxonomic studies of the genus have arranged taxonomic accounts of many species in the lake, our knowledge of morphological traits has still been insufficient in <i>S. reticulata</i> Kajiyama & Habe, 1961, which belongs to the <i>S. niponica</i>-group in the genus. Among the various habitats of the lacustrine species, in addition, the species richness of this group in coastal sandy mud areas of the lake has not been completely clarified. In this study, we revisited the taxonomic

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28

López, Adolfo, Janina Urcuyo, and Gabriel Vega. "Extension of the genus Pseudopeas (Dysopeas) (Gastropoda: Subulinidae) from Venezuela to Nicaragua." UNED Research Journal 7, no. 2 (2015): 333–39. http://dx.doi.org/10.22458/urj.v7i2.1162.

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The study of Nicaraguan land snails is fragmentary. Recent sampling produced specimens of an undetermined species of Pseudopeas Putzeys, 1899. This genus was segregated from Opeas Albers, 1850 by reason of its prominent rib sculpture and later re-de- scribed by Pilsbry (1906) for the characteristic spiral sculpture of its nepi- onic whorls. Baker (1927) named a new subgenus Dysopeas for species where the spiral sculpture covers the entire shell, not only the nepionic whorls. The Nicaragua specimens show nepionic and body sculptures that precisely match descriptions and illustrations given by P

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29

Oliver, Joan Daniel, and Emilio Rolán. "The family Tornidae (Gastropoda, Rissooidea) in the East Atlantic, 2. Circulinae." Iberus 29(1) (June 30, 2011): 9–33. https://doi.org/10.5281/zenodo.4554417.

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The species of the subfamily Circulininae from the East Atlantic belonging to the genus <em>Circulus </em>are studied. There is a total of 8 species, of which 2 are previously undescribed. The shell morphology is ilustrated for all the species with scanning electron micrographs which show the protoconch and, in some cases, the microsculpture.

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Pusateri, Francesco, Riccardo Giannuzzi-Savelli, and Marco Oliverio. "A revision of the Mediterranean Raphitomidae 1: on the sibling species Raphitoma contigua Monterosato, 1884 and Raphitoma spadiana n. sp. (Gastropoda, Conoidea)." Iberus 30(1) (January 31, 2012): 41–52. https://doi.org/10.5281/zenodo.4555972.

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A new raphitomid toxoglossan, <em>Raphitoma spadiana </em>n. sp., is described from the Mediterranean Sea. It is the sister species to <em>R. contigua </em>Monterosato, 1884, from which it differs in the different protoconch (paucispiral vs. multispiral), adding to a long list of pairs of caenogastropod species differing in their larval development.

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31

Andreeva, Svetlana I., Tatiana E. Peretolchina, Tatiana Ya. Sitnikova, Evgeny S. Babushkin, and Maxim V. Vinarski. "On the genetic diversity and protoconch variability of snails of the genus Caspiohydrobia Starobogatov, 1970 (Caenogastropoda: Hydrobiidae)." Ruthenica, Russian Malacological Journal 34, no. 4 (2024): 157–69. https://doi.org/10.35885/ruthenica.2024.34(4).2.

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Andreeva, Svetlana I., Peretolchina, Tatiana E., Sitnikova, Tatiana Ya., Babushkin, Evgeny S., Vinarski, Maxim V. (2024): On the genetic diversity and protoconch variability of snails of the genus Caspiohydrobia Starobogatov, 1970 (Caenogastropoda: Hydrobiidae). Ruthenica, Russian Malacological Journal 34 (4): 157-169, DOI: 10.35885/ruthenica.2024.34(4).2, URL: https://doi.org/10.35885/ruthenica.2024.34(4).2

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Rolán, Emilio, and Ángel A. Luque. "Two new species of Columbellidae (Gastropoda: Buccinoidea) from the Cape Verde Archipelago." Iberus 20(1) (June 30, 2002): 73–83. https://doi.org/10.5281/zenodo.4515332.

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A new species of <em>Anachis </em>and another one of <em>Mitrella </em>(Gastropoda:  Columbellidae) from the Cape Verde Archipelago are described. The paucispiral protoconch of both of them indicates a non-planktotrophic development. The new species seem to have a distribution restricted to the Archipelago and are compared with other related West African columbellids.

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33

Pusateri, Francesco, Riccardo Giannuzzi-Savelli, and Marco Oliverio. "A revision of the Mediterranean Raphitomidae 2: On the sibling species Raphitoma lineolata (BDD, 1883) and Raphitoma smriglioi n. sp." Iberus 31(1) (March 4, 2013): 11–20. https://doi.org/10.5281/zenodo.4579457.

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A new raphitomid toxoglossan, <em>Raphitoma smriglioi </em>Pusateri & Giannuzzi-Savelli n. sp., is described from the Mediterranean Sea. It is the sister species of <em>Raphitoma lineolata </em>(B.D.D., 1883), from which it differs in the different protoconch (paucispiral v. multispiral), adding to a long list of pairs of caenogastropod species differing in their larval development.

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34

Vera-Peláez, José Luis, Jordi Martinell, and M. Carmen Lozano-Francisco. "Turridae (Gastropoda, Prosobranchia) del Plioceno inferior de Málaga (España)." Iberus 17(1) (June 30, 1999): 1–19. https://doi.org/10.5281/zenodo.4653525.

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This paper lists the species of the Turridae family (Gastropoda, Prosobranchia) identified in Lower Pliocene outcrops of the Málaga province. Seventy-nine species are quoted, and their taxonomic, paleoecologic and bioestratigraphic characteristics are given. The use of the protoconch and teleoconch features proves to be very useful in the identification of the different taxonomical levels.

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35

Quiñonero-Salgado, Sergio, Joaquin Lopez-Soriano, Jarillo Ramón Ruiz, et al. "Primeras citas de Hawaiia minuscula (Binney, 1840) (Gastropoda: Pristilomatidae) en la península Ibérica." Spira 5, no. 1-2 (2013): 99–101. https://doi.org/10.5281/zenodo.8277308.

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The first citations for Hawaiia minuscula in the Iberian Peninsula are provided. Most of them correspond to highly modified habitats within urban areas. Some protoconch and teleoconch details are given, which could prove diagnostic for the species. This is a species that deserves a better follow-up, as some naturalized populations could be hidden in some places.

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36

Page, L. R. "Ontogenetic Torsion and Protoconch Form in the ArchaeogastropodHaliotis kamtschatkana: Evolutionary Implications." Acta Zoologica 78, no. 3 (1997): 227–45. http://dx.doi.org/10.1111/j.1463-6395.1997.tb01009.x.

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37

ARNOLD, JOHN M., and BRUCE A. CARLSON. "LivingNautilusEmbryos: Preliminary Observations." Science 232, no. 4746 (1986): 73–76. http://dx.doi.org/10.1126/science.232.4746.73.

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Nautilus, long recognized as the most primitive living cephalopod, provides insight into molluscan evolution. Despite many attempts, embryos have not been observed until now. This report details the surface morphology and extraembryonic circulatory pattern. It was found that development, as in other extant cephalopods, is direct, without larval stages. There appears to be no embryonic protoconch associated with shell ontogeny.

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38

Quiñonero-Salgado, Sergio, Jesús Ruiz-Cobo, and Emilio Rolán. "Three new species of Spiralix (Burgosia) (Gastropoda, Moitessieriidae) from the northern Iberian Peninsula." Iberus 35(1) (February 6, 2017): 59–70. https://doi.org/10.5281/zenodo.4744743.

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The species of the genus <em>Spiralix, </em>considered in the subgenus <em>Burgosia </em>from the north of the Iberian Peninsula are analysed, with the description of three new species; these are compared with the type species of the genus and those geographically closer species. The differential characters are described and shown, among them the microsculpture of the protoconch.

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39

Amati, Bruno. "On a new species of Manzonia from Selvagens Islands, (Gastropoda, Prosobranchia, Rissoidae)." Publicações Ocasionais da Sociedade Portuguesa de Malacologia 16 (January 31, 1992): 9–12. https://doi.org/10.5281/zenodo.6641964.

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<em>Manzonia (M.) boucheti </em>sp. nov. is here described and figured from the isle of Salvaje Pequena (Islas Salvajes). It is compared with the closely related <em>M. wilmae</em> Moolenbeek & Faber 1987, <em>M. darwini</em> Moolenbeek & Faber, 1987 and <em>M. pelorum </em>Moolenbeek & Faber, 1987, on the grounds of teleoconch and protoconch features .

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Collado, Gonzalo A., Elizabeth Chihuailaf, Natalia Muñoz-Herrera, Manuel Contreras, Fernando Novoa, and Moisés A. Valladares. "Reproductive aspects of the poorly known and critically endangered freshwater snail Heleobia atacamensis (Gastropoda: Truncatelloidea)." PeerJ 9 (August 17, 2021): e11550. http://dx.doi.org/10.7717/peerj.11550.

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Knowing the reproductive biology of threatened species is essential for conservation and to establish proper management plans. Heleobia atacamensis, a freshwater snail only known from two locations in the Atacama Saltpan, northern Chile, is currently classified as Data Deficient on the IUCN Red List and Critically Endangered by the Ministerio del Medio Ambiente of Chile. Based on size-frequency distribution, multivariate analysis of shell measurements, and microdissections, we studied the reproductive strategy, recruitment period, sex ratio and sexual dimorphism in this species. Heleobia ataca

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Fernandes, Maurício R., Raquel Garofalo, and Alexandre D. Pimenta. "New species and records of Newtoniellinae (Caenogastropoda, Newtoniellidae) from Brazil." Journal of the Marine Biological Association of the United Kingdom 95, no. 4 (2015): 791–804. http://dx.doi.org/10.1017/s0025315414001933.

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Newtoniellinae is a worldwide marine group of cold-water, deep-sea species, comprising the genera Cerithiella, Paramendax and Trituba. Prior to this study, the subfamily was represented in Brazil by four species of Cerithiella. The present contribution adds new Brazilian records of two of these species, Cerithiella amblytera and Cerithiella enode, in addition to new records of two species previously known only from Cuba and the south-eastern USA, respectively: Cerithiella sigsbeana comb. nov. and Cerithiella producta. Two new species of Cerithiella from Brazil are described: Cerithiella atali

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42

ANDREEVA, S. I., T. E. PERETOLCHINA, T. Ya Sitnikova, E. S. BABUSHKIN, and M. V. Vinarski. "On the genetic diversity and protoconch variability of snails of the genus Caspiohydrobia Starobogatov, 1970 (Caenogastropoda: Hydrobiidae)." Ruthenica, Russian Malacological Journal 34, no. 4 (2024): 157–69. http://dx.doi.org/10.35885/ruthenica.2024.34(4).2.

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The genus Caspiohydrobia belongs to the less-known taxa of the family Hydrobiidae. According to a conchologically-based system, developed in the 1970-1980s by Yaroslav I. Starobogatov and his co-authors, the genus includes around 30 living species. However, the most recent data based on molecular evidence indicate that most (if not all) of these morpho-species should be considered junior synonyms of a widely distributed species, Ecrobia grimmi. However, the vast majority of nominal species described in the genus Caspiohydrobia have never been reassessed by molecular taxonomic methods. In this

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43

Falniowski, Andrzej, Aleksandra Jaszczyńka, and Sebastian Hofman. "A new species of Bythinella (Truncatelloidea: Bythinellidae) from Bosnia and Herzegovina." Journal of Conchology 44, no. 6 (2023): 551–61. http://dx.doi.org/10.61733/jconch44603.

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A new species of Bythinella from Vrelo Vrioštice spring in Bosnia and Herzegovina is described. The shell, protoconch, radula, female reproductive organs and penis are illustrated and described. Cytochrome oxidase c subunit I (COI) placed the new species as the sister taxon of B. serborientalis Radoman, 1978. Shell biometry (PCA) and COI (genetic distance p = 0.072) clearly confirm the distinctness of the newly described species.

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44

Dantart, Luis, and Ángel A. Luque. "Notas sobre Homalopoma sanguineum (Linnaeus, 1758) (Gastropoda, Archaeogastropoda, Turbinidae)." Iberus 12(2) (June 30, 1995): 77–82. https://doi.org/10.5281/zenodo.4641415.

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A description of the external anatomy of <em>Homaloploma sanguineum </em>(Linnaeus, 1758), the type species of the genus <em>Homalopoma </em>Carpenter, 1864, is given for the first time based both on the study of living and fixed specimens using critical point and scanning electron microscopy. Other data about the teleoconch and protoconch, the radula and the diet of this species are commented on.

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45

Rolán, Emilio, and Francisco Fernandes. "A família Triphoridae (Molusca: Gastropoda) no Arquipélago de Cabo Verde." Publicações Ocasionais da Sociedade Portuguesa de Malacologia 11 (July 15, 1988): 17–32. https://doi.org/10.5281/zenodo.6590439.

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Eleven species of Triphoridae Gray, 1847 collectedover many years years in the Cabo Verde Archipelago are discussed. Five are described as new species:<em> Metaxia incerta </em>n. sp., <em>Monophorus verdensis</em> n. sp., <em>Marshallora gutta</em> n. sp ., <em>M. bubistae </em>n. sp., and <em>M. mariangelae</em> n. sp., with reference to shell and protoconch morphology, animal chromatism and radula

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46

J., TEMPLADO, RICHTER A., and CALVO M. "Reef building Mediterranean vermetid gastropods: disentangling the Dendropoma petraeum species complex." Mediterranean Marine Science Journal 17(1) (January 20, 2016): 13–31. https://doi.org/10.12681/mms.1333.

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A previous molecular study has revealed that the Mediterranean reef-building vermetid gastropod <em>Dendropoma petraeum</em> comprises a complex of at least four cryptic species with non-overlapping ranges. Once specific genetic differences were detected, ‘<em>a posteriori</em>’ searching for phenotypic characters has been undertaken to differentiate cryptic species and to formally describe and name them. The name <em>D. petraeum</em> (Monterosato, 1884) should be restricted to the species of this complex distributed around the central Mediterranean (type locality in Sicily). In th

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Berschauer, David, and Edward Petuch. "A New Species of Harpa (Gastropoda: Harpidae) from the Coral Sea Archipelagos of Queensland, Australia." Festivus 48, no. 2 (2016): 103–8. http://dx.doi.org/10.54173/f482103.

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A new species of Harpa, closely related to the widespread Indo-Pacific Harpa major Röding, 1798, is described from the Coral Sea archipelagos east of the Great Barrier Reef system of Queensland, Australia. The new taxon, Harpa queenslandica, differs from Harpa major in being consistently a smaller and more lightweight shell, in having fewer varices per whorl, in having a much paler shell color, and in having a proportionally-larger protoconch that is composed of 3 ½ whorls.

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Pusateri, Francesco, and Riccardo Giannuzzi-Savelli. "A new raphitomine neogastropod from the Mediterranean Sea (Conoidea)." Iberus 26(2) (December 31, 2008): 119–26. https://doi.org/10.5281/zenodo.4542272.

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<em>Raphitoma villaria </em>n. sp. is described from Taormina (Sicily) and is compared with the closely related <em>R. leufroyi </em>(Michaud, 1828). Differential characters are given for the protoconch, the adult shell, and the colour pattern of the living animal. <em>Raphitoma villaria </em>n. sp. lacks a radula which is present in <em>R. leufroyi. </em>The new species has been confused with <em>R. erronea </em>(Monterosato, 1884), which is a different species.

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49

Rolán, Emilio, and Serge Gofas. "The family Elachisinidae (Mollusca, Rissooidea) in the temperate and tropical Atlantic." Iberus 21(2) (December 31, 2003): 67–90. https://doi.org/10.5281/zenodo.4516157.

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The Atlantic species of the genus <em>Elachisina </em>Dall, 1918 (Mollusca, Rissooidea), including those hitherto placed in other genera, are revised. In total there are four previously known species (<em>E. floridana </em>(Rehder, 1943), from the Caribbean, <em>E. eritima </em>(Smith, 1891), from St. Helena Island, <em>E. canarica </em>(Nordsieck and Garcia-Talavera, 1979) (comb. nov.), from the Canaries and <em>E. canaliculata </em>Rolán and Rubio, 2001, from the Cape Verde Islands), besides seven species which are described as new to science (<em>E. azoreana </em>n. sp., from the Azo

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50

Simone, Luiz Ricardo L. "Stapafurdius, a new genus of Bulimulidae (Mollusca, Eupulmonata) from Bahia, Brazil, with two new species." Papéis Avulsos de Zoologia 61 (October 27, 2021): e20216192. http://dx.doi.org/10.11606/1807-0205/2021.61.92.

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The new genus Stapafurdius gen. nov. is introduced collected from Bahia, Brazil, including two new species: S. glaber sp. nov., the type species, occurs in Ibicoara; and S. costiferus sp. nov., from Andaraí regions. The new genus includes species of about 10 mm, elongated shell, reticulated protoconch, elongated peristome, and wide umbilicus. Both species differ mainly by the sculpture, as S. glaber sp. nov. is smooth, while S. costiferus sp. nov. has strong axial sculpture. urn:lsid:zoobank.org:pub:C851695E-6BF1-4418-8D8A-8BC7D10CC2FE.

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