Velopecten survivans Matsumoto, 1930
MATSUMOTO, H. 1930. On the Marine Faunae of Three Fossil Zones of the Upper Miocene of Natori District, Province of Rikuzen. The Science Reports of the Tōhoku University [2nd. Series - Geology], 13 (3): 96-109, pls. 39, 40. [p. 106, pl. 11, figs. 16-18]
«Velopecten survivans, sp. nov.
Pl. XL (II), Figs. 16-18. Shell medium-sized, rather thin-valved, irregularly flexuous and irregularly convex, more or less equilateral, subovate, shorter than wide; ribs some twenty in number, every second of which is slightly weaker and is of the secondary order; some interstices are provided with a very weak intercalary, especially toward the ventral margin; the ribs of left valve are narrow, being about as wide as interstices proximally but distinctly narrower than the same ventrally, and are prominent and rounded; the anterior ear of the same valve is long and very large, provided with about nine radiating riblets, which are quite narrow but prominent, while the posterior ear is short and very small; the interstices of both the main body of valve and the anterior ear show a sort of very fine meshwork striation; the inner surface is not very distinctly folded.
One left valve, which is the unique type-specimen, measures ca. 56 mm. in length, 65 mm. in width, 15 mm. in convexity, and 22 mm. and 23 mm. in the length and maximal width, respectively, of anterior ear. Very rare. Age: Upper Miocene.» HIKOSHICHIRÔ MATSUMOTO, 1930
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H. Matsumoto, 1930, plate 40.
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