Bractechlamys langfordi (Dall, Bartsch & Rehder, 1938)
DALL, W. H., P. BARTSCH & H. A. REHDER. 1938. A manual of the Recent and fossil marine pelecypod mollusks of the Hawaiian Islands. Bernice P. Bishop Museum Bulletin, Honolulu, 153: iv, 233 p., pls. 1-58. [p. 85, pl. 21, figs. 9-12]
1938 Nodipecten langfordi Dall, Bartsch & Rehder, 1938
W. H. Dall, P. Bartsch & H. A. Rehder, 1938, plate 21.
|
«1935. Pecten (Nodipecten) noduliferus Hertlein: Nautilus, vol. 49, pp.27- 28. Not of Sowerby.
Shell equivalved, subcircular, gibbous, varying in color from white through yellow to orange, unicolor or mottled and variegated. The wings are equally developed and marked by six somewhat irregular radiating cords. The central portion of the rather inflated disk is marked by eight strong, broad, moderately elevated, radiating folds which bear large rounded nodules, and which are about twice as broad as the spaces that separate them and which grow less strong laterally. They are marked also by radiating cords which vary in number from five to 12, the larger number being on the central fold. On the lateral margin the folds disappear, but the fine threaded sculpture present on the ribs remains. The depressed areas between the folds are also marked by radiating cords that equal those on the ribs in strength. The anterior and lateral border at the byssal notch is finely denticulated. Interior of the shell rather brilliantly colored; the edge of the shell is yellow, the hinge and the rest of the interior, bright red. The dorsal termination of the ligamental area shows a few slender longitudinal grooves. The resilium is large and triangular. On each side of the resilium in the right valve is a pit for the reception of an equivalent tooth in the left valve. This pit is bordered on each side by oblique teeth which in turn have equivalent depressed areas in the opposite valve. This in turn is followed by a deep pit engaging the strong tooth in the opposite valve and then by a big heavy tooth which has its equivalent depression in the other valve and still another depression for a tooth in the opposite valve. The teeth, as well as the rest of the hinge, are finely transversely grooved. The margin of the shell is slightly scalloped and somewhat fluted basally, and its edge rather prominently denticulated. The type, U.S.N.M. Cat. No. 337547, was dredged by Thaanum (Coll. No. 5190b) off Waikiki, Oahu, in 33-50 fathoms. It measures: height, 32.3 mm.; length, 32.5 mm.; diameter, 21.0 mm. U.S.N.M. Cat. No. 484167 contains a specirnen from the type locality. We have seen the following additional material: U.S.N.M. Cat. No. 339890, 1 valve dredged by W. D. Giffard at the entrance to Honolulu llarbor, Oahu. U.S.N.M. Cat. No. 362272, 1½ specimens collected by Edward Tyson at Pupukea Beach, Oahu. U.S.N.M. Cat. No. 337540, 6 specimens collected by Thaanum (Coll. No. 5190a) at the entrance to Honolulu Harbor, Oahu, in 5-8 fathoms. U.S.N.M. Cat. No. 335562, 1 valve dredged by the U. S. Bureau of Fisheries Steamer Albatross at Station 4054 on the northeast coast of Hawaii in 26-50 fathoms on coarse coral sand and coralline bottom; surface temperature 74º F. U.S.N.M. Cat. No. 337539, 1 valve collected by Thaanum (Coll. No. 5190) on the beach at Honokowai, Maui. U.S.N.M. Cat. No. 335670, 1 valve coliected by the Albatross at Station 3837 otr the south coast of Molokai in 13 fathoms on yellow sand bottom; surface temperature 76º F. U.S.N.M. Cat. No. 335561, 1 valve dredged by the Albatross at station 3849 otr the south coast of Molokai in 73-43-0 fathoms on coarse sand, broken shell and coral bottom; bottom temperature 67.6º F. U.S.N.M. Cat. No. 335563, 1 valve dredged by the Albatross at Station 3819 off the south coast of Molokai in 70-99 fathoms on coarse sand, coral and rock bottom; bottom temperature 73º F. U.S.N.M. Cat. No. 335669, 1 valve dredged by the Albatross at Station 3876 in Auau channel between Maui and Lanai in 28-43 fathoms on sand and gravel bottom; bottom temperature 74º F. U.S.N.M. Cat. No. 339832, 1 valve collected by Olga Smith at Waimea, Kauai. U.S.N.M. Cat. No. 335671, 1 valve dredged by the Albatross at station 4158 near Moku Manu in 20-30 fathoms on coarse coralline bottom: bottom temperature 78.6.º F. Bishop Museum No. 60272 contains 3 valves from Haena, Kauai.» WILLIAM HEALEY DALL, PAUL BARTSCH & HARALD ALFRED REHDER, 1938 |