Taxonomical Review of Corbulids (Bivalvia : Corbulidae) from the Miocene Tanabe Group in Wakayama Prefecture, Southwest Japan

Abstract

Taxonomic relationships among the four corbulid species, Corbula peregrina, C. tanabensis, C. tsukaharai and C. succincta, all of which were described based on the specimens from the Miocene Tanabe Group, are discussed. C. peregrina is a member of the genus Solidicorbula, and C. tanabensis and C. tsukahara are synonyms ; C. succincta is a distinct species and is reassigned to the genus Varicorbula ; Solidicorbula succincta (Yokoyama) auct. reported from the upper lower-lower middle Miocene in southwest Japan is synonymous with C. peregrina, not C. succincta. Two valid species, Solidicorbula peregrina, n. comb. and Varicorbula succincta, n. comb., are redescribed.