Chlamys hastata pugetensis (Oldroid, 1920)
OLDROID, I. S. 1920. New species of west cooast shells. The Nautilus, 33 (4): 135-136, pl. 4. [p. 136, pl. 4, figs. 5, 6]
1920 Pecten islandicus pugetensis Oldroyd, 1920
I. S. Oldroid, 1920, pl. 4.
|
«Shell much smaller than the typical, sculpture coarser in proportion to the size. Shell more elongate and the ribs spinose. Ribs 17 with a very fine one in the interspaces.
The type is in the Oldroyd Collection, Stanford University. Type locality off San Juan Island, Puget Sound. 12 specimens were obtained, two from the dredge, and ten from rocks on shore.» IDA SHEPARD OLDROID, 1920
|
«Discussion. This small pectinid is sufficiently distinct to stand as a separate species. Middendorff's original figures of C. beringiana are reconstructed so as to give the impression of relationship to C. pugetensis. I am not aware of the occurrence of C. pugetensis in Bering Sea. Grant and Gale (1931, p. 168) and Grau (1959, p. 90) associated this form with Pecten hastatus and Burch (1944, p. 5) associated it with P. hericius. Its closest known relative probably is C. hastata hericius, but it diverged from the hastata stock in Pliocene time (see remarks under C. hastata, p. 14).
Types: The holotype is in the collections of Stanford University. The figured specimens (USNM 637739, 637740) are different individuals; the larger, a left valve, measures 31 mm in height and 26 mm in length Type locality: Recent, San Juan Island, Puget Sound, Wash Distribution: This species was identified from supposed Pliocene beds near Los Angeles (Grant and Gale, 1931, p. 168). It was collected by W. O. Addicott, of the U.S. Geological Survey, from a terrace deposit of late Pleistocene age about one-half mile southeast of Point Año Nuevo, San Mateo County, Calif. The species is fairly abundant in the vicinity of Puget Sound. Grau (1959, p. 91) gave its Recent range as Newport Bay (near Los Angeles), Calif., to Hinchinbrook Island, Prince William Sound, Alaska. The specimen figured here is from Sitkalidak Island, USGS M2064, off eastern Kodiak, a further extension of its range.» MACNEIL, F. S. 1967. Cenozoic pectinids of Alaska, Iceland, and other nothern regions. United States Geological Survey Professional Paper, 553: iv, 57 p., pls. 1-25. [p. 15]
|
Chlamys ("Chlamys") pugetensis (Oldroyd); F. S. MacNeil, 1967, Cenozoic pectinids of Alaska, Iceland, and other nothern regions, plate 22, figures 4, 5.
|
«This subspecies is distinguishable from Chlamys hastata and C. hastata hericia by its rib-structure, sculpture of disk, obliquely truncated posterior auricles and internal coloring; juveniles 12 mm in height or less are only distinguishable by the punctate sculpture of the disk.
Geographical range: Hinchinbrook Island, Prince WilIiam Sound, Alaska, to Newport Bay, California. Geochronological range: ?Pliocene; Pleistocene, Recent. Bathymetric range: On rocks at minus tide, and in depths of to 40 fathoms. Ecological data: Found on rocks at minus tide, and in rocky, sandy or muddy bottoms; often associated with algae; occasionally encased in same species of sponge as Chlamys rubida (Hinds).» GRAU, G. 1959. Pectinidae of the eastern Pacific. Allan Hancock Pacific Expeditions, 23: viii, 308 p., 57 pls. University of Southern California Press. Los Angeles, California. [p. 91]
|
Chlamys hastata pugetensis (Oldroyd) 1920; G. Grau, 1959, Pectinidae of the eastern Pacific, plate 30.
|