Yabepecten Masuda, 1963
MASUDA, K. 1963. The so-called Patinopecten of Japan. Transactions and Proceedings of the Palaeontological Society of Japan [N. S.], 52: 145-153, pls. 22, 23. [p. 149]
«Genus Yabepecten MASUDA. n. gen
Type species:-- Pecten tokunagai YOKOYAMA, 1911. Pliocene Koshiba formation of Kanagawa Prefecture.
Geological range:— Pliocene.
Diagnosis:— Shell large, rather thin, compressed, suborbicular, inequivalve, right valve more convex than nearly flat or slightly inlbted left valve: right valve with numerous, very low, round-topped radial ribs which are obscure in younger stage but Lend to become distinct with growth; left valve with rather distinct, very slender, low radial ribs which tend to become obscure with growth and characteristic, conspicuous network; anterior auricle brger than posterior, with very shallow byssal notch; hinge with simple cardinal crura, wide and shallow resilial pit with rather distinct lateral ridges which tend to become obscure towards and auricular crurae which terminare distally in a rounded, rather obscure, oblong denticle; interior surface slightly folded corresponding to external sculpture.
Remarks:— The present new genus is named in honor of Dr. Hisakatsu YABE, Emeritus Professor of the Tohoku University, who founded the Institute of Geology and Paleontology, Tohoku University.
The present new genus is based upon the Pliocene Pecten tokunagai YOKOYAMA. The genus Patinopecten can be distinguished from the present one by its distinct, squarish radial ribs in the right valve, deep byssal notch and much more conspicuous auricular crurae. Fortipecten, Masudapecten, Nipponopecten and Kotorapecten also can be distinguished from the present one by their lacking auricular crurae with distinct distal denticle.» KÔICHIRÔ MASUDA, 1963
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Yabepecten tokunagai (Yokoyama); K. Masuda, 1963, The so-called Patinopecten of Japan, plate 22, figures 2-4.
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