Spondylopecten badiensis (Cox, 1952)
COX, L. R. 1952. The Jurassic Lamellibranch fauna of Cutch. (Kachh). Nr. 3. Families Pectinidae, Amusiidae, Plicatulidae, Limidae, Ostreidae and Trigoniidae (Supplement). Memoirs of the Geological Survey Of India. Paleontologia Indica, 9 (3) (Part. 4): 1-128, pls. 1-12. [p. 16, pl. 1, figs. 14a, 14b]
1952 Chlamys (Spondylopecten?) badiensis Cox, 1952
«Chlamys (Spondylopecten?) badiensis: Cox, 1952, p. 16, pl. 1, fig. 14; 1965, p. 58, pl. 7, figs. 3 and 4.
Description. Shell small, rounded, triangular, and equilateral. Radial sculpture consists of 24 rounded ribs. In middle part ribs are straight, but are slightly curved on the margins. Rib interspaces are equal in width to ribs.
Comparisons and comments. It differs from S. erinaceus (Buv.) in having larger number of ribs, in the absence of ornamentation on the ribs and in the rib interspaces. Range and age. USSR: M. Kavkaz, Callovian? Outside of the USSR: Callovian of India and Tanzania.» 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. 9]
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Spondylopecten badiensis (Cox, 1952); 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, figure 3.
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«1952. Chlamys (Spondylopecten ?) badiensis Cox: 16, pI. 1, figs. 14a, b.
MATERIAL. Two specimens (nos. L.93552, LL.35099), the latter ex B.P. ColI.
LOCALITIES AND HORIZON. Namakambe stream, Mandawa-Mahokondo anticline, Tanganyika; probably Callovian. ½ mile N.W. of bridge over Mkulumuzi river, 2 miles W. of Tanga, Tanganyika; Callovian. DESCRIPTION. Both specimens have 23 rounded, moderately prominent ribs, as in the holotype of C. badiensis. In one specimen the dorsal margins of the body of the shell are concave and extend almost to the middle of the height of the valve, the ventral margin of which forms a semicircle. In the second specimen the dorsal margins are relatively short, extending only to the dorsal third of the height of the valve, and the ventral margin is semi-elliptical. Although the two specimens thus differ considerably in outline, it is thought that they belong to the same species. In the first and less eroded specimen, a right valve 28 mm. high, the ribs bear a median and two lateral rows of small scales, together with regular, delicate transverse striations which are arched towards the umbo. The narrow, V-shaped intervals are also transversely striated and are bordered on each side by a longitudinal thread at the base of the adjacent rib. The second specimen, a left valve of about the same height, retains traces of similar ornament in places. The auricles are imperfect in both specimens, but can be seen to bear squamose or beaded radial riblets. REMARKS. C. badiensis, the holotype of which came from the Callovian of Cutch, is closely related to the French Callovian species C. palinurus (d'Orbigny) (see Cossmann, 1913a: 2, pI. 11, figs. 1-4; 1924: 29, pI. 5, figs. 5, 6), but in that species the number of ribs is only 20. Other related forms are C. syriaca Cossmann (1925: 325, pI. 8, figs. 7a-c), with about 30 ribs, and C. macfadyeni Cox (1935a: 176, pI. 18, figs. IIa, b), with 19 ribs. All possibly could be geographical races of C. palinurus. The ligamental area of the right valve has not been observed in any of these forms, but their tentative reference to Spondylopecten is suggested by their external similarity to Pecten erinaceus Buvignier, its type species.» COX, L. R. 1965. Jurassic bivalvia and gastropoda from Tanganyika and Kenia. Bulletin of the British Museum (Natural History) Geology, Supplement, 1: 1-213, pls. 1-30. [p. 58]
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Chlamys (Spondylopecten ?) badiensis Cox; L. R. Cox, 1965, Jurassic bivalvia and gastropoda from Tanganyika and Kenia, plate 7, figures 3, 4.
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