Spondylopecten proumbonatus Yamani, 1975
YAMANI, S. A. 1975. Bivalven-fauna der Korallenkalke von Laisakker bei Neuburg a. d. Donau. Unteres Tithonium, Bayern. Palaeontographica, (A), 149: 31-118. [p. 64, pl. 3, figs. 11, 12]
1975 Spondylopecten proumbonatus Yamani, 1975
«Spondylopecten proumbonatus Yamani, 1975, p. 64, pl. 3, figs. 11-12.
Description. Shell is large, triangular in outline, elongated. Beak of right valve strongly protrudes over hinge margin, is elongated, inflated. Hinge margin is straight. Anterior auricle of right valve is twice as large as posterior and is with deep byssal notch. Valves are ornamented with 31 radial, acute-angled ribs with interspaces approximately twice as narrow as the ribs.
Comparisons and comments. From other species of genus is differs in having valve elongated in height, narrow and protruding beaks, a large anterior auricle with deep byssal notch. Range and age. USSR: Southern slope of Bol’shoy Kavkaz {Caucasus Mountains} (Azerbaijan), Tithonian. Outside of the USSR: West Germany, lower Tithonian. KASUM-ZADE, A. A. & L. F. ROMANOV.
1987. Spondylopectinidae Kasum-Zade & Romanov, fam. nov. of Jurassic
in the south of the USSR. In: L. A. Nevasskaya (Ed.), Stratigraphy of the Moldavian Upper Phanerozoic.
Shtiinstsa, Kishinev: 6-16, pl. 1, 2 (in Russian; Translated by Rosanne
D’Aprile Johnson, VIARC, Smithsonian Institution, 8 August 2007) [p. 10]
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Spondylopecten proumbonatus Yamani, 1975; A. A. Kasum-Zade, A. A. & L. F. Romanov, 1987, Spondylopectinidae Kasum-Zade & Romanov, fam. nov. of Jurassic in the south of the USSR, plate 1, figures 8, 9.
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