Annachlamys nausorensis (Ladd, 1934)
LADD, H. S. 1934. Geology of Vitilevu, Fiji. Bernice P. Bishop Museum Bulletin, 119: 1-263, pls. 1-44. [p.173, pI. 27, figs. 8, 9]
1934 Pecten (Chlamys) nausorensis Ladd, 1934
H. S. Ladd, 1934, plate 27.
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«Shell medium in size, suborbicular, slightly longer than wide, thick; valves compressed, the left a trifle deeper than right; inequilateral, both valves being somewhat produced anteriorly. Anterior auricle slightly larger than posterior, marked by 4 or 5 very fine riblets which are crossed by numerous incremental lines. Valves each with 18 rounded or slightly angled ribs and fine closely set lines of growth; submargins prominent and unribbed. Cardinal margins of auricles slightly bent over; chondrophore broadly triangular and moderately deep, flanked by a pair of prominent cardinal crura. Ctenolium absent.
Holotype (B. P. Bishop Mus., Geol. no. 1107), a right valve; length 41.1 mm., height 38.3 mm., depth 6.0 mm. Paratype (B. P. Bishop Mus., GeoI. no. 1108), a left valve: length 39.6 mm.; height 38.7 mm.; depth 6.6 mm. Localities: holotype from Station 158; paratype from Station 133.
The dorsal margins of this species do not slope as steeply as in the type of Chlamys, no ribs are added by implantation, and there is no ctenolium. The species, however, seems closer to Chlamys than to the other recognized subgenera.» HARRY STEPHEN LADD, 1934
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«The fossil record of Annachlamys appears to be limited to the Neogene (Miocene to Pleistocene) of the Indo-Pacific region. Examples are Annachlamys okinawaensis Noda, 1991, from the Ryukyu Islands, southwest Japan, Pecten (Chlamys) suvaënsis Mansfield, 1926, and Pecten (Chlamys) nausorensis Ladd, 1934 from the late Miocene or early Pliocene of the Fiji Islands, and Pecten murrayanus Tate, 1886, from the Morgan Limestone of South Australia. The last species is possibly the oldest known Annachlamys.»
WALLER, T. R. 2006. New Phylogenies of the Pectinidae (Mollusca: Bivalvia): reconciling Morphological and Molecular Approaches. In S.E. Shumway & G.J. Parsons (Ed.) 2006: Scallops: Biology, Ecology and Aquaculture, 1-44. [p. 27]
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