Haumea rehderi (Grau, 1960)
GRAU, G. 1960. A new Chlamys from the south Pacific. The Nautilus, 74: 15-18. [p. 15, pl. 2, figs. 1-3]
1960 Chlamys (Argopecten) rehderi Grau, 1960
G. Grau, 1960, plate 2.
|
«Shell small, largest known specimen (a right valve) 9.5 mm. in height and 9 in length, nearly equivalve and nearly orbicular; moderately inflated; hinge margin as long as disk or nearly; beaks produced a little beyond hinge margin. Right valve moderately convex; 18 to 23 rounded ribs on central portion of disk, with 4 or 5 riblets flanking each submargin; interspaces about same width as ribs; entire disk covered with fine concentric lamellae, usually worn off tops of ribs. Anterior auricle long, with 5 to 7 pronounced and distinctly irnbricated riblets, moderately wide fasciole, fairly deep byssal sinus, and ctenoliurn of 6 teeth; posterior auricle long, with 6 to 8 low, rounded and moderately lamellose riblets. Left valve sliglitly deeper than right, but with ribbing and sculpture identical; auricles long, as in right valve, and each with 5 to 7 low, rounded ancl moderately lamellose riblets. Interior of each valve fluted as result of external ribbing; fluting extending, although becoming progressively weaker, up into umbonal region; reverse surfaces of external interspaces angulate; prominent cardinal crura flanking ligamental pit of right valve, with corresponding depressions in lelt valve. Coloration: right valve white, yellow-white or pink, irregularly maculate with brown or yellow-brown, and often with wavy streaks of white which are interrupted by interspaces; left valve rnore profusely colored, having streaks or blotches of yellow-brown, pale to deep brown, or red-brown.
Holotype: Height and length 8 mm.; hinge line 7 rnm.; inflation 3.75 rnm. U. S. National Museum, no. 612201. Type lot: USNM. 612202. Type locality: Tereia Point, Bora Bora Island, Leeward Group, Society Islands, French Oceania. All specimens collected in 13-16 fathoms by Dr. H. A. Rehder, April 4, 1957.» GILBERT GRAU, 1960 |
«Distribution and ecology.— So far this species was only recorded from the Indonesian Archipelago, New Caledonia and the Society Islands. Specimens live among coral rubble on sandy bottoms i n shallow water.
Remarks.— Rumphius (1705) did not record this pretty, small species. Dautzenberg & Bavay (1912: 19) erroneously identified it as "P. (Aequipecten) aequisulcatus Carpenter", a species occurring in the Lower Californian region. Grau (1960) placed this species in Argopecten, a subgenus of Chlamys. Subsequently, Dijkstra (1988, 1989) and Rombouts (1991) treated it as a species of Argopecten. Recent morphological and phylogenetic studies (Waller in Shumway, 1991; Dijkstra, unpubl.) indicate that the present species belongs in Haumea rather than Argopecten. No species of Argopecten are known from the Indo-Pacific region.» DIJKSTRA, H. H. 1997. Results of the Rumphius Biohistorical Expedition to Ambon (1990), part 6. Mollusca, Bivalvia, Pectinidae. Zoologische Mededelingen, 71 (27): 313-343, figs. 1-49, tabs 1-3. [p. 332]
|
Haumea rehderi (Grau, 1960); H. H. Dijkstra, 1997, Results of the Rumphius Biohistorical Expedition to Ambon, figures 39, 40.
|