Opal top shell Cantharidus opalus, copyright Svenja Heesch.

Belongs within: Trochidae.

Cantharidus is a western Pacific genus of trochids with a smooth, sharp-spired shell known from the Miocene to the present (Knight et al. 1960).

Characters (from Knight et al. 1960): Spire tapering, surface nearly smooth; columellar fold and tooth weak or absent.

<==Cantharidus Montfort 1810BR05 (see below for synonymy)
|--C. (Cantharidus)P61
| |--C. (C.) opalus (Martyn 1784)P61 (see below for synonymy)
| | |--C. o. opalusP61
| | `--C. o. cannoni Powell 1933P61
| `--C. (C.) purpureus (Gmelin 1791)P61
|--C. (Iwakawatrochus Kuroda & Habe 1954)KC60
| `--C. (*I.) vittatus (Pilsbry 1903) [=Gibbula vittata]KC60
`--C. (Levella Marwick 1943)KC60
`--C. (*L.) tersa (Marwick 1943) [=*Levella tersa]KC60

Cantharidus incertae sedis:
‘Elenchus’ badiusH08
C. crenelliferus (Adams 1853)H09 [=Thalotia crenelliferaH09; incl. Trochus artensis Fischer 1878H08]
C. exasperatusPP64
C. fenestratus Suter 1917F27
C. lehmanni (Menke 1843)W93
C. marginatus (Ten.-Woods 1880) [=Thalotia marginata]H09
C. polychroma (Adams 1853)WBS-S15
C. pulcherrimus (Wood 1828)W93
C. purpuratus (Martyn 1784) [=C. (Cantharidus) purpuratus]F27
C. pyrgos [incl. C. moniliger Adams 1853]H08
C. ramburi (Crosse 1864) [incl. C. lesueuri Fischer 1880]W93
C. strigatus (Adams 1853) (see below for synonymy)H08
C. suturalis (Adams 1853) [=Thalotia suturalis]H09

Cantharidus Montfort 1810BR05 [=Canthiridus (l. c.)BR05, Cantharidium Schaufuss 1869KC60, Cantharis Férussac 1821 non Linnaeus 1758KC60, Elenchus Swainson 1840 non Curtis 1831KC60]

Cantharidus strigatus (Adams 1853) [=Thalotia strigata; incl. Trochus baudini Fischer 1878, Th. mundula Adams & Angas 1864]H08

Cantharidus (Cantharidus) opalus (Martyn 1784)P61 [=Limax opalusKC60; incl. Trochus iris Gmelin 1791KC60, *Cantharidium irisKC60, *Cantharidus irisP61, *Elenchus irisKC60, E. splendidulus Swainson 1840H08]

*Type species of generic name indicated


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

[F27] Finlay, H. J. 1927. A further commentary on New Zealand molluscan systematics. Transactions and Proceedings of the New Zealand Institute 57: 320–485.

[H08] Hedley, C. 1908. Studies on Australian Mollusca. Part X. Proceedings of the Linnean Society of New South Wales 33: 456–489, pls 7–10.

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

[KC60] Knight, J. B., L. R. Cox, A. M. Keen, R. L. Batten, E. L. Yochelson & R. Robertson. 1960. Gastropoda: systematic descriptions. 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. I169–I331. Geological Society of America, and University of Kansas Press.

[PP64] Peres, J. M., & J. Picard. 1964. Nouveau manuel de bionomie benthique de la mer Mediterranee. Recueil des Travaux de la Station Marine d’Endoume, Bulletin 31 (27): 5–137.

[P61] Powell, A. W. B. 1961. Shells of New Zealand: An illustrated handbook 4th ed. Whitcombe and Tombs Limited: Christchurch.

[WBS-S15] Willan, R. C., C. Bryce & S. M. Slack-Smith. 2015. Kimberley marine biota. Historical data: molluscs. Records of the Western Australian Museum Supplement 84: 287–343.

[W93] Wilson, B. 1993. Australian Marine Shells vol. 1. Prosobranch Gastropods. Part One. Odyssey Publishing: Kallaroo (Western Australia).

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