Tosapecten suzukii okadai Nakazawa, 1952
NAKAZAWA, K. 1952. A study on the pelecypod-fauna of the Upper Triassic Nabae group in the northern part of Kyoto Prefecture, Japan. Part 1. Pectinids and limids. Memoirs of the College of Sience, University of Kyoto [Series B -Geology and Mineralogy], 20 (2): 95-106, pls. 7-10. [p. 100, pl. 7, figs. 3, 4]
1952 Tosapecten okadai Nakazawa, 1952
K. Nakazawa, 1952, plate 7.
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«Description: – This is represented by a convex right valve which is supposed to be longitudinarly elongated by deformation. Shell subovate, equilateral, rather convex; anterior ear as wide as posterior, byssal notch shallow, but deeper in young stage; pesterior ear truncated at the upper corner. Surface sculptured by seven main ribs with one faint secondary rib, submargins at both sides rather wide but ornament unknown. Trigonal resilifer is present.
Comparison: – This species closely resembles Tosap. nabaensis, but broaber submargin, peculiar shape and subequal length of ears easily distinguish it from the latter. It is deformed by crustal movement, and its apical angle may be wider and its length larger than the present sample. Whether the truncated form of the posterior ear is caused by crushing or not, however, is doubtful. Occurrence: – Upper part of N3 bed, Nishimitsumatsu. (Loc. No. N-202, Reg. No. JM 10009).» KEIJI NAKAZAWA, 1952
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