Spondylus arrialoorensis Stoliczka, 1871
STOLICZKA, F. 1870-1871. Cretaceous fauna of Southern India. III. The Pelecypoda, with a review of all known genera of this class, fossil and recent. Memoirs of the Geological Survey Of India. Paleontologia Indica, 537 p., pls. 1-50. [p. 447, pl. 33, fig. 5]
1871 Spondylus arrialoorensis Stoliczka, 1871
1897 Spondylus ariyalurensis Kossmat, 1897
1897 Spondylus ariyalurensis Kossmat, 1897
F. Stoliczka, 1870-1871, plate 33.
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«Sp. testa oblique late ovata, valva inferiore late affixa, cupuliforme, umbone moderate irregulariter producta, margine inferiore sensim elevata, radiatim costellata et concentrice crasse lamellata; valva superiore convexa, versus marginem deplanata, radiatim costellata et concentrice obsolete striata, costellis paulo inaequalibus, confertis, aequidistantibus, rugulose spinulosis, posticis paulo fortioribus quam anticis, nonnullis (3—4) crassioribus et ad intervalla spinis altis, lateraliter compressis, armatis; auriculis magnis, sub-aequalibus, sub-laevigatis, obsolete striolatis, utraque prope marginem cardinalem, fere rectum et incrassatum, costula spinulose lamellosa instructa; umbone obtuso, extra marginem paulo projiciente.
The lower valve of this species is sessile with a broad surface on a fragment of an Inoceramus; it is rather low at the umbo, which is irregular, and with the front area apparently somewhat excavated; towards the margin the valve is free, obliquely elevated, radiately striated, and concentrically strongly lamellated. The upper valve is moderately convex, covered with very numerous radiating ribs, which are of sub-equal size and made sharply rugose by the concentric striae of growth; a few of the radiating ribs are stronger, and armed with laterally compressed, tuberculous spines. The ears are rather large, almost equal, nearly smooth, with straight thickened hinge margins, near which runs a strongly foliaceous or spinulose rib; the beak is obtuse and slightly projects beyond the hinge margin ; (the last two characters are not sufficiently clearly shown in the figure).
Locality.— South-west of Mulloor, in soft grey sandstone. Formation.— Arrialoor group.» FERDINAND STOLICZKA, 1871
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