Taxonomic Re-examination of <i>Limopsis belcheri</i>  (Bivalvia: Limopsidae)

Nobuhara Takami

doi:10.18941/venus.80.3-4_67

<p>Limopsis belcheri (Adams & Reeve, 1850) was based on a Samarang Expedition specimen from "off Cape of Good Hope, South Africa, 120 fathoms", but Adams (1863) revised the type locality to "Korean Islands" without specifying a reason. The placement of East Asian limopsids such as Limopsis tajimae G. B. Sowerby III, 1914, L. uwadokoi Oyama, 1951, and L. tokaiensis Yokoyama, 1910 in synonymy with L. belcheri by recent workers has caused confusion. This study reexamines the figured syntype of L. belcheri and corrects its synonymy, focusing on Recent specimens. Limopsis belcheri is confirmed to be a distinct species from L. tajimae, L. uwadokoi and L. tokaiensis, distinguishable by 1) the serrated crenulation along the inner ventral margin, and 2) a resilifer pit filled only by a fibrous layer. All figures so far identified as L. belcheri from Japan, Korea, and China disagree with the inner shell characters of this syntype. In contrast, the South African species Limopsis chuni Thiele & Jaeckel, 1931 agrees with it in both outer and inner shell characters, and should be synonymized. These observations support the proposal that the type locality of Limopsis belcheri should be off the Cape of Good Hope, as noted in the original description, and not the revised locality proposed by Adams (1863).</p>

Taxonomic Re-examination of <i>Limopsis belcheri</i> (Bivalvia: Limopsidae)

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