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 1810 BR05 (see below for synonymy)
    |–C. (Cantharidus) P61
    |    |–C. (C.) opalus (Martyn 1784) P61 (see below for synonymy)
    |    |    |–C. o. opalus P61
    |    |    `–C. o. cannoni Powell 1933 P61
    |    `–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’ badius H08
  C. cingulatus (Adams 1863) [=Leiopyrga cingulata] H09
  C. crenelliferus (Adams 1853) H09 [=Thalotia crenellifera H09; incl. Trochus artensis Fischer 1878 H08]
  C. exasperatus PP64
  C. fenestratus Suter 1917 F27
  C. marginatus (Ten.-Woods 1880) [=Thalotia marginata] H09
  C. pulcherrimus M54
  C. purpuratus (Martyn 1784) [=C. (Cantharidus) purpuratus] F27
  C. pyrgos [incl. C. moniliger Adams 1853] H08
  C. ramburi M54
  C. strigatus (Adams 1853) (see below for synonymy) H08
  C. suturalis (Adams 1853) [=Thalotia suturalis] H09

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

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

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

*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.

[M54] Macpherson, J. H. 1954. Molluscs (sea shells and snails). In: Willis, J. M. (ed.) The Archipelago of the Recherche pp. 55–63. Australian Geographical Society: Melbourne.

[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.

Leave a comment

Your email address will not be published. Required fields are marked *