Indigiropecten Trushchelev, 1984
TRUSHCHELEV, A. M. 1984. The new Triassic bivalve taxons of Jakutia. Rossiiskaya Akademiya Nauk Sibirskoe Otdelenie, Trudy. Instituta Geologii i Geofiziki, Akademiia Nauk SSSR 600: 64-72, pl. 10-11 (in Russian).
Tosapecten (Indigiropecten) mirabilis Truschelev, 1984; L. A. Nevesskaja, S. V. Popov, I. A. Goncharova, A. V. Guzhov, B. T. Janin, I. V. Polubotko, A. S. Biakov, V. A. Gavrilova, 2014, Phanerozoic Bivalvia of Russia and Surrounding Countries, figures 81.1a, 81.1b.
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«Tosapecten (Indigiropecten) resembles Tosapecten s.s. in its basic shell outline and ribbing pattern, the difference being that here the valves become nearly equiconvex, because the left valve becomes secondarily convex after a flatter stage in early ontogeny. The auricles of T. (Indigiropecten) are somewhat shorter relative to shell length than are those of Tosapecten s.s., and the byssal notch of T. (Indigiropecten) becomes very shallow by maturity. The right auricles of T. (Indigiropecten) are very deeply scrolled, producing a distinctly V-shaped dorsal margin. Trushchelev (1984) claimed that the left auricles may also be deeply scrolled, but his photographs do not indicate the very deep scrolling on the left valve that is shown in his drawing (fig. 1). Tosapecten (Indigiropecten) is known only on the basis of its type species, T. (I.) mirabilis Trushchelev, 1984, which occurs in the Lower Norian Pinacoceras verchojanicum Zone and lower Middle Norian Otapiria ussuriensis Zone of eastern Yakutiya in central Siberia [Trushchelev, 1984; see Dagis and Tozer (1989, p. 4) for stratigraphic placement of ammonoid zones]. Tosapecten (Indigiropecten) is probably derived from Tosapecten s.s., because its distinctive characters can all be derived from character states already present in that subgenus.»
WALLER, T. R. & G. D. STANLEY JR. 2005. Middle Triassic Pteriomorphian Bivalvia (Mollusca) from the New Pass Range, west-central Nevada: Systematics, biostratigraphy, paleoecology, and paleobiogeography. Journal of Paleontology, [Memoir Paleontological Society 61], 79 (1): 1-59, figs. 1-14. [p. 45]
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