Osilinus Philippi 1847
Creators
Description
Subgenus Osilinus Philippi, 1847
Type species. Trochus turbinatus Born, 1778, SD, Opinion 1930, 1999). Present-day, Mediterranean Sea.
Diagnosis. As for Phorcu s. Umbilicus fully sealed. Callous columella with weak denticle.
Remarks. Conchologically nearly indistinguishable from Phorcus but the callus is a reliable character. It is broadly spread out in Osilinus but forms a rim, which may leave a chink or even an umbilicus in Phorcus.
Ravn (1933) and Lauridsen & Schnetler (2014) reported Osilinus carinatus Ravn, 1933 from the Danian (early Paleocene) of the North Sea Basin (Denmark). The illustrated specimen, however, is unrelated with Phorcus and Osilinus due to its low conical shell, large, inflated last whorl and wide umbilicus. This age would also be in strong disagreement with the molecular phylogeny of Donald et al. (2012), who assumed that the Phorcus / Osilinus lineage arose around 19–9.5 Ma.
Further records of the subgenus are allegedly reported from the early Miocene of the Proto-Mediterranean Sea (Trochocochlea tauroparva Sacco, 1896) and from the middle Miocene of the NE Atlantic and the Central Paratethys Sea (Phorcus (Osilinus) miocaenicus (Mayer, 1853) (Landau et al. 2003; Nosowska 2020). These species are umbilicate and lack any glossy circumbilical area as typical for extant Phorcus (Osilinus) species. In our opinion, they are unrelated with Phorcus (Osilinus). Similarly, the two poorly preserved Pliocene species from the North Sea (Trochocochlea erthensis Etheridge & Bell in Bell, 1893 and Trochocochlea littoralis Etheridge & Bell in Bell, 1893; see Harmer 1923) are most probably not closely related with Phorcus (Osilinus). All these taxa are listed herein as Gibbula s.l.
No pre-Pliocene fossil records of Phorcus (Osilinus) are known.
= Caragolus Monterosato, 1884; type species Trochus turbinatus Born, 1778, SD (Crosse 1885: 440). Presentday, Mediterranean Sea.
= Pseudosilinus Nordsieck, 1974; type species “ Monodonta edulis Lowe, 1842 ” [= Phorcus (Osilinus) sauciatus (Koch, 1845)], OD (Nordsieck 1974: 21). Present-day. NE Atlantic. Remark. Monodonta edulis Lowe, 1842 is a nomen nudum and no such publication exists (Ávila et al. 2015) and therefore, Pseudosilinus is unavailable.
= Trochocochlea M̂rch, 1852; type species: Trochus turbinatus Born, 1778, SD (Bucquoy et al. 1885: 401). Present-day, Mediterranean Sea).
(Landau et al. 2003; Nosowska 2020)
Notes
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Linked records
Additional details
Identifiers
Biodiversity
References
- Born, I. (1778) Index rerum naturalium Musei Caesarei Vindobonensis. Pars I. ma. Testacea. Verzeichniss der nat ʾ rlichen Seltenheiten des k. k. Naturalien Cabinets zu Wien. Erster Theil. Schalthiere. Kraus, Vindobonae, XL + 458 pp. [https: // www. biodiversitylibrary. org / item / 43890 # page / 7 / mode / 1 up] https: // doi. org / 10.5962 / bhl. title. 11581
- Lauridsen, B. W. & Schnetler, K. I. (2014) A catalogue of Danian gastropods from the Baunekule facies, Faxe Formation, Denmark. Geological Survey of Denmark and Greenland Bulletin, 32, 1 - 117. [https: // pdfs. semanticscholar. org / 496 e / 750 f 13533 c 3739 ea 6 bf 2012035296 b 411 e 55. pdf] https: // doi. org / 10.34194 / geusb. v 32.4593
- Donald, K. M., Preston, J., Williams, S. T., Reid, D. R., Winter, D., Alvarez, R., Buge, B., Hawkins, S. J., Templado, J. & Spencer, H. G. (2012) Phylogenetic relationships elucidate colonization patterns in the intertidal grazers Osilinus Philippi, 1847 and Phorcus Risso, 1826 (Gastropoda: Trochidae) in the northeastern Atlantic Ocean and Mediterranean Sea. Molecular Phylogenetics and Evolution, 62 (1), 35 - 45. https: // doi. org / 10.1016 / j. ympev. 2011.09.002
- Mayer, K. (1853) Verzeichnis der in der marinen Molasse schweizerisch-schwabischen Hochflache enthaltenen fossilen Mollusken. Mitteilungen der Naturforschenden Gesellschaft Bern, 1853 (274 - 278), 76 - 106. [https: // www. e-periodica. ch / digbib / volumes? UID = mnb- 001]
- Bell, A. (1893) Notes on the correlation of the later and post-Pliocene Tertiaries on either side of the Irish Sea, with a reference to the fauna of the St. Erth Valley, Cornwall. Proceedings of the Royal Irish Society, 18, 620 - 642. [https: // www. biodiversitylibrary. org / item / 55509 # page / 664 / mode / 1 up]
- Harmer F. W. (1923) The Pliocene Mollusca of Great Britain, being supplementary to S. V. Wood's monograph of the Crag Mollusca, 1. Monographs of the Palaeontographical Society, 2 (3), 705 - 856.
- Crosse, H. (1885) Nomenclatura generica e specifica di alcune conchiglie mediterranee, pel Marchese di Monterosato. Journal de Conchyliologie, 33, 139 - 142. [http: // biodiversitylibrary. org / page / 15979493]
- Koch, K. A. (1845) s. n. In: Philippi, R. A., Abbildungen und Beschreibungen neuer oder wenig gekannter Conchylien, unter Mith ʾ lfe mehrerer deutscher Conchyliologen. Vol. 1. Fischer, Cassel, pp. 1 - 204. [https: // www. biodiversitylibrary. org / item / 41582 # page / 9 / mode / 1 up] https: // doi. org / 10.5962 / bhl. title. 10589
- Avila, S. P., Madeira, P., Rebelo, A. C., Melo, C., Hipolito, A., Pombo, J., Botelho, A. Z. & Cordeiro, R. (2015) Phorcus sauciatus (Koch, 1845) (Mollusca: Gastropoda) in the Azores Archipelago (NE Atlantic Ocean): the onset of a biological invasion. Journal of Molluscan Studies, 81 (4), 516 - 521, supplementary material. https: // doi. org / 10.1093 / mollus / eyv 012