Pecten lucens Tate, 1886
TATE, R. W. 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. [p. 115]
PARTIM:
2001 Amusium morganense Beu & Darragh, 2001 [from ‘River Murray cliffs at Blanchetown]
1861 Pecten balloti Bernardi, 1861 [other locations different from "River Murray cliffs at Blanchetown"]
1861 Pecten balloti Bernardi, 1861 [other locations different from "River Murray cliffs at Blanchetown"]
Pecten lucens, spec. nov.
«Shell nearly orbicular, slightly inequivalve, equilateral, a little gaping at each side below the ears, compressed, thin, pellucid, externally smooth but radially and concentrically striated under the lense; internally rayed with from 30 to 36 pairs of ribs. Eight valve slightly convex from the umbo to the anterior margin; ears equal, straight, truncated, transversely striated and faintly radially ridged. Left valve depressed in the umbonal region; ears obliquely truncated, transversely striated, upper margin sometimes dentate; hinge area internally thickened, bearing at each anterior corner a subacute boss.
Dimensions.— Transverse and longitudinal diameters 48 millimetres; thickness through both valves 10 millimetres. My largest specimen measures 100 millimetres in the diameters. Localities.— Oyster bed, Aldinga Bay; calciferous sandstone of the River Murray Cliffs at Blanchetown. P. lucens differs from all living species of the group by the greater number of the internal radial ridges, and by the same character it is separable from the Chilian fossil species, P. Darwinianus, D'Orb., to which it bears a close resemblance.» RALPH TATE, 1886 |