White baby’s-ear snail Sinum perspectivum, copyright James St John.

Belongs within: Naticidae.

Sinum is a genus of moon snails with an ear-shaped shell and reduced, horny operculum.

Characters (from Oldroyd 1927): Shell ear-shaped, with minute spire and very large aperture, externally with revolving striae, colour usually white, sometimes with a thin corneous epidermis. Operculum minute, horny, subspiral.

<==Sinum Röding 1798 (see below for synonymy) BR05
|–*S. haliotoideum (Linnaeus 1758) BR17 (see below for synonymy)
|–‘Sigaretus’ australis Dunker 1871 H09
|–S. californicum Oldroyd 1917 O27
|–S. debile Gould 1852 O27 [=Sigaretus debilis C64]
|–‘Sigaretus’ eximius Reeve 1864 H09
|–‘Sigaretus’ filicatus Mighels 1845 J49
|–S. fornicatum A27
|–S. grayi (Deshayes 1843) [incl. S. cortezi Burch & Burch 1964] BC01
|–S. keratium Dall 1919 O27
|–S. laevigatum C60
|–S. maculatum (Say 1831) S11
|–S. martini Finlay 1927 (see below for synonymy) F27
|–S. neritoides [=Sigaretus neritoides] O27
|–S. pazianum Dall 1919 O27
|–S. perspectivum (Say 1831) S11
|–‘Sigaretus’ planulatus H09
|–S. sanctijohannis (Pilsbry & Lowe 1932) PP78
`–‘Sigaretus’ subglobosus H86

Sinum Röding 1798 [=Sigaretus Lamarck 1799 [Adeloderma, Cryptocochlides, Schismatobranchia, Sigaretidae, Sigaretinae] BR05

*Sinum haliotoideum (Linnaeus 1758) BR17 [=Helix haliotoidea BR17, *Sigaretus haliotoideus BR17, Velutina haliotoidea J64]

Sinum martini Finlay 1927 [=Sigaretus undulatus Martin 1885 nec Lischke 1872 nec Hutton 1885; incl. Natica (Ampullina) laevis Hutton 1885 non N. laevis Weerth 1884] F27

*Type species of generic name indicated


[A27] Allan, R. S. 1927. The geology and palaeontology of the Lower Waihao Basin, south Canterbury, New Zealand. Transactions and Proceedings of the New Zealand Institute 57: 265–309.

[BR05] Bouchet, P., & J.-P. Rocroi. 2005. Classification and nomenclator of gastropod families. Malacologia 47 (1–2): 1–397.

[BR17] Bouchet, P., J.-P. Rocroi, B. Hausdorf, A. Kaim, Y. Kano, A. Nützel, P. Parkhaev, M. Schrödl & E. E. Strong. 2017. Revised classification, nomenclator and typification of gastropod and monoplacophoran families. Malacologia 61 (1–2): 1–526.

[BC01] Boyko, C. B., & J. R. Cordeiro. 2001. Catalog of Recent type specimens in the Division of Invertebrate Zoology, American Museum of Natural History. V. Mollusca, part 2 (class Gastropoda [exclusive of Opisthobranchia and Pulmonata], with supplements to Gastropoda [Opisthobranchia], and Bivalvia). Bulletin of the American Museum of Natural History 262: 1–170.

[C64] Carpenter, P. P. 1864. Supplementary report on the present state of our knowledge with regard to the Mollusca of the west coast of North America. Report of the British Association for the Advancement of Science 33: 517–686.

[C60] Cox, L. R. 1960. Gastropoda: general characteristics of Gastropoda. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt I. Mollusca 1: Mollusca—General Features, Scaphopoda, Amphineura, Monoplacophora, Gastropoda—General Features, Archaeogastropoda and some (mainly Paleozoic) Caenogastropoda and Opisthobranchia pp. I84–I169. Geological Society of America, and University of Kansas Press.

[F27] Finlay, H. J. 1927. New specific names for austral Mollusca. Transactions and Proceedings of the New Zealand Institute 57: 488–533.

[H09] Hedley, C. 1909. The Marine Fauna of Queensland: Address by the President of Section D. Australasian Association for the Advancement of Science: Brisbane.

[H86] Hutton, F. W. 1886. The Mollusca of the Pareora and Oamaru systems of New Zealand. Proceedings of the Linnean Society of New South Wales, series 2, 1 (1): 205–237.

[J64] Jeffreys, J. G. 1864. The Upper Tertiary fossils at Uddevalla, in Sweden. Report of the British Association for the Advancement of Science 33 (Notices and Abstracts): 73–79.

[J49] Johnson, R. I. 1949. Jesse Wedgwood Mighels with a bibliography and a catalogue of his species. Occasional Papers on Mollusks 1 (14): 213-231.

[O27] Oldroyd, I. S. 1927. The Marine Shells of the West Coast of North America vol. 2 pt 3. Stanford University Press: Stanford University (California).

[PP78] Poorman, F. L., & L. H. Poorman. 1978. Additional molluscan records from Bahía de Los Angeles, Baja California Norte. Veliger 20 (4): 369–374.

[S11] Simone, L. R. L. 2011. Phylogeny of the Caenogastropoda (Mollusca), based on comparative morphology. Arquivos de Zoologia 42 (4): 161–323.

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