Laevichlamys ruschenbergeri (Tryon, 1869)
TYRON JR., G. W. 1869. Descriptions of new species of marine bivalve Mollusca in the collection of the Academy of Natural Sciences. American Journal of Conchology [New Series], 5 (3): 170-172, pls. 14, 16. [p. 171, pl. 14, fig. 1]
1869 Pecten ruschenbergerii Tryon, 1869
G. W. Tyron Jr., 1869, plate 14.
|
«Description.— Shell suborbicular, somewhat inequilateral, rather thin and compressed, beaks very narrow and pointed, not prominent. Surface covered with about thirty not very prominent rounded ribs from which spring sharply-vaulted scales, a smaller smooth rib between each pair of scaly ribs, and occasionally separated from them by one or two raised lines. Color uniform brownish red.
Length 77, width 72 mill. Hab.— Bay of Muscat.— Dr. W. S.W. Ruschenberger, U.S.N. Remarks.—This very fine species belongs to a group embracing P. asperrimus, Lam., P. prunum, Reeve, etc.; it is distinguished from all of them by the pattern of its ribbing. I take great pleasure in dedicating this species to the presiding officer of the Conchological Section of the Academy of Natural Sciences, in recognition of the intelligent zeal with which he has, through a long series of years, labored to augment our collections.» GEORGE WASHINGTON TYRON JR., 1869
|
«OG18: Scaeochlamys: Usually superficialis is considered to live in the Red Sea and ruschenbergerii in Arabian waters. However, Raines & Goto (2006) remarked under ruschenbergerii: “This is a difficult species to identify and it may currently be a variation of L. superficialis”. Indeed, specimens off Eilat, Israel connect these extremes well.
The differences mentioned by Dijkstra, et al. (1984) seem quite variable. Red Sea specimens may reach almost the size of Arabian specimens, they may be as convex, and the fineness of the sculpture is variable. Typical superficialis seems just to represent an uncommon extreme, flat light form of the more common rounded, heavier typical ruschenbergerii form. Superficialis is well depicted in Chemnitz 7 66 630 (arausicanus), likely stemming from Niebuhr’s material as well. Locally, in pristine habitats, this is a very common species. Usually it occurs in reddishbrown color, but orange and white are also found. Superficialis/ruschenbergerii have been generically shifted hence and forth and been placed in Scaeochlamys, Laevichlamys, Azumapecten, sometimes even in different genera. Comparing the type species, then superficialis is perceived closer to livida than to multisquamata. Gmelin’s Ostrea sauciata is based on Chemnitz 7 69 H from the Red Sea, in all probability from Forsskål and Niebuhr’s original material. Raines & Goto (2006 p. 398) placed it as synonym of ruschenbergerii. However, the OD of Chemnitz clearly points into P. rubromaculatus of Sowerby II, which is well known from the Red Sea. Laevichlamys sauciata (Gmelin, 1791) is therefore understood as the valid, earlier name for Pecten rubromaculatus. Lamy (1936) came to a similar conclusion.» HUBER, M. 2010. Compendium of Bivalves. 901 pp. + 1 CD-ROM. ConchBooks. Hackenheim, Germany. [p. 626, 627]
|
Pecten Arausicanus; J. H. Chemnitz,1784, Neues Systematisches Conchylien-Cabinet Cabinet, Band 7, plate 66, figure 630.
J. H. Chemnitz,1784, Neues Systematisches Conchylien-Cabinet Cabinet, Band 7, plate 69, figure H.
|
«Other species.— In addition to the type species, extant species included in the new genus [Laevichlamys] are as follows: Pecten irregularis G.B. Sowerby II, 1842; P. lemniscatus Reeve, 1853; P. limatulus Reeve, 1853; P. mollitus Reeve, 1853; P. ruschenbergeri Tryon, 1869; Ostrea squamosa Gmelin, 1791; and Chlamys wilhelminae Bavay, 1904. All of these live in the Indo-Pacific region.
There is still much to learn about the fossil record of this genus, but two extinct species are included thus far: Pecten (Chlamys) lauensis Ladd in Ladd and Hoffmeister, 1945, Fiji, late Miocene or Pliocene; P. shirahamaensis Nomura and Niino, 1932, Japan, Early Pliocene (Masuda, 1962, p. 185).» WALLER, T. R. 1993. The evolution of Chlamys (Mollusca: Bivalvia: Pectinidae) in the tropical western Atlantic and eastern Pacific. American Malacological Bulletin, 10 (2): 195-249, figs. 1-14. [p. 204]
|
Laevichlamys ruschenbergerii (Tryon, 1869); B. K. Raines & G. T. Poppe, 2006, A Conchological Iconography, The Family Pectinidae, plate 150, figures 1-4.
|
«Material:— Many specimens from numerous localities in the M. Miocene, U. Miocene and Pliocene of Persia.
Remarks:— The type locality for C. ruschenbergeri is Muscat (Arabia), there being many specimens from this locality in the Winckworth Collection now in the British Museum (Natural History). It is also known from Aden (British Museum (Natural History) collections) and the Red Sea (Winckworth Collection, and Paris Museum). The fossil specimens are slightly eroded, and so lack the squamae found on the ribs of Recent examples.» EAMES, F. E. & L. R. COX. 1956. Some Tertiary Pectinacea from East Africa, Persia, and the Mediterranean region. Proceedings of the Malacological Society of London, 32 (1): 1-68, pls. 1-20. [p. 13, 14]
|
Chlamys ruschenbergeri (Tyron); F. E. Eames & L. R. Cox, 1956, Some Tertiary Pectinacea from East Africa, Persia, and the Mediterranean region, plate 3, figures 2, 3.
|