Bulgariochlamys Kasum-Zade, 2003
KASUM-ZADE, A. A. 2003. Advance in research of mesozoic bivalve mollusks in Azerbaijan (Order Pectinoida: Revision and Systematics). 111 pp. Baku. (in Russian; translated by Rosanne D’Aprile Johnson, VIARC, Smithsonian Institution). [p. 48]
«Genus Bulgariochlamys Kasum-Zade gen. nov. [37]
Type species. Pecten sparsinodosus Zittel, 1866, p. 38 (114), pl. 17, fig.7. [38]
Diagnosis. Shell is round, of rounded outline, elongated in length, equivalved, strongly convex; almost spherical in upper third of shell. Auricles almost equal, anterior is with byssal notch and is very slightly longer than posterior. Hinge margin is straight. Composition. Monotypic. Comparison. It differs from Macroclamis Sacco, 1897 in having greater convexity of shell, triangular-rounded costae, in the presence of large spines; in Chlamys (Nodipecten) Dall, 1898 [type, Ostrea nodosa Linné] shell is less convex, anterior auricle is more truncated than left one; radial costae on left valve are single, but on the right, are fused in pairs at the beak. Range. Upper Cretaceous of Austria, Maastrichtian of Bulgaria.» [37] Name comes from the Turkic tribes who moved from the Volga River Basin (Volzhskaya Bulgaria) to the modern territory of Bulgaria, giving the old name to the latter country.
[38] Zittel’s species (1866, p. 38 (114), pl. 17, fig. 7) was established from a single right valve, of a specimen from the Upper Cretaceous sediments of the northeastern Alps (Muthmansdorf, Neuenwelt). Tsankov (1981, p. 109, fig. 49, fig. 2-3) describes this species from specimens with closed valves from the Maastrichtian sediments of Bulgaria (Krasovo, Breznishko). Diagnosis of the genus is given from the aforementioned originals. A. A. KASUMZADEH, 2003
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Pecten sparsinodosus Zitt.; K. A. Zittel, 1866, Die Bivalven der Gosaugebilde in den Nordöstlichen Alpen. Beitrag zur charakteristik der Kreidefonnation in Österreich. I. Theil 2. Hälfte und II Theil, plate 17, figure 7.
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