Cyclochlamys pteriola (Melvill & Standen, 1907)
MELVILL, J. C. & R. STANDEN. 1907. The marine Mollusca of the Scottish national Antarctic expedition I. Transactions of the Royal Society of Edinburgh, 46 (5): 119-157 [p. 147, pl. 46, figs. 16, 16a]
1907 Pecten pteriola Melvill & Standen, 1907
J. C. Melvill & R. Standen, 1907,
plate 46. |
«P. testa parva, inaequivalvi, inaequilaterali, albo-cinerea, obliquante, valva dextra minore, haud nitente, concentricé rudi-striata, aliter Iaevi, auricula valvae hujus solum antica, lata, tenuisculpta, valva sinistra convexa, arctissimé liris concentricis incrementalibus lamellatis praedita; interstitiis feré obtectis, umbone dextrae acuto, incurvo, margine dorsaliter utrimque aequali, recto, deinde apud marginem ventralem obliqué leniter rotundato. Pagina intus alba, nitida.
Alt. 4, lat. 4.5, diam. 1.5 mm. Hab.— Station 325. Dredged in Scotia Bay, South Orkneys, April 1903, at 9-10½ fathoms.
The nearest approach to this particularly interesting little Pecten, of which several examples, all precisely similar, occurred, is P. aviculoides, Sm. (Rep. "Challenger" Exp.: Lamellibr., xiii., p. 325, pl. xxii., figs. 5, 5a). It is, however, not only double the size of that minute form, but also very differently sculptured, the ribs, so characteristic on the left valve of the Challenger species, which came from Prince Edward Island, being absent, and replaced by closely laminate concentric ridges or lirae. The specific name is chosen from the likeness to species of Pteria, Scop. ( = Avicula, Lam.) in miniature.» JAMES COSMO MELVILL & ROBERT STANDEN, 1907
|