Observations onClanculus tonnerrei(G. amp; H. Nevill 1874) (Mollusca Gastropoda Trochidae)

摘要

Trochus (Clanculus) tonnerreiG. amp; H. Nevill 1874, described from Aden, is shown to be an earlier name for the western Indian Ocean species currently known asClanculus gennesiFischer 1901. The latter, plus its synonymEuchelus erythraeensisSturany 1903, must therefore be relegated to the synonymy ofT. tonnerrei. Clanculus gibbonsiSowerby 1912, is also shown to be a synonym; type material of all the above species is illustrated.Clanculus assabensisCaramagna 1888, may be another synonym, but the type material is not available for confirmation. Radula characters and external anatomy support referral of the species toClanculus, but subgeneric relations are unclear; it is tentatively placed inClanculopsis.The radula is very similar to that of members ofClanculuss.s., but the apertural dentition is closer toClanculopsis. Trochus satrapiusvon Martens 1874, is not considered conspecific withC. tonnerrei;type material is illustrated for comparison. Lectotypes are designated forEuchelus erythraeensisSturany 1903, andTrochus satrapiusvon Martens 1874.