Mimachlamys sturtiana (Tate, 1886)
TATE, R. 1886. The lamellibranchs of Older Tertiary of Australia (part 1). Transactions and Proceedings and Report of the Royal Society of South Australia, 8: 96-158, pls. 2-12. [p. 109, pl. 7, figs. 2a-b]
1886 Pecten sturtianus Tate, 1886
Ralph Tate, 1886, plate 7.
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«Shell nearly orbicular, convex, equivalve, equilateral; about 30 flatly rounded radial ribs covered with distant, thick, imbricating scales, the alternating furrows about as broad as the ribs, marked with transverse or oblique lines. Margin of valves crenulate-undulate. Eight valve with unequal ears; the posterior larger, triangular, and subaliiform, strongly rayed and granular or spinosely scaly; the anterior ear triangular, faintly three-rayed, with perpendicular lamellae conspicuous only towards dorsal margins, and obliquely striated. Left valve, posterior ear elongately produced, narrow, deeply excavated by a byssal sinus, four nodular-scaly ribs; anterior small, similarly ornamented to corresponding ear in the right valve.
Dimensions. — Length, 18; height, 18·5; and thickness through both valves, 10 millimetres. Localities.— Not uncommon in the Calciferous sandstones of the E. Murray cliffs at Blanchetown, &c.; raggy limestones at Mannum (P. T.); rare Muddy Creek, Hamilton. The species is dedicated to the memory of Captain Sturt, the pioneer geologist of the basin of the Lower Murray river. P. Sturtianus has a general resemblance to P. Malvinae, of the Viennese Miocene.» RALPH TATE, 1886
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