Veprichlamys deynzerorum Dijkstra, 2004
DIJKSTRA, H. H. 2004. Two new species of Pectinoidea (Bivalvia, Propeamussiidae and Pectinidae) from the Philippines. Basteria, 67 (3-4): 127-133. [p. 130, figs. 1-6]
2004 Veprichlamys deynzerorum Dijkstra, 2004
H. H. Dijkstra, 2004, figures 1-10.
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«Description. — Shell thin and flattened, up to 43 mm high, nearly circular and slightly posteriorly oblique, somewhat higher than wide. Valves equiconvex, nearly equivalve. Auricles strongly inequal in shape and size. Umbonal angle c. 90º. Colour cream-brownish, with small dark and pale brown radials and maculations umbonally, which are also visible from the inside.
Both valves sculptured with numerous (c. 30 on central part, c. 50 ventrally), irregularly spaced, squamous radial costae, starting at 1 mm shell height and extending towards ventral margin, while increasing in prominence and number. Microsculpture of interspaces slightly variable, with weak, irregular radial striae on central part of disc, more antimarginal laterally; preradial stage nearly smooth. Anterior auricle of left valve larger than posterior one, sculptured with 8-10 weakly developed squamous radial ribs; posterior auricle with 5 weak squamous radial lirae. Interspaces of early growth stage microscopically reticulated in the paratype and nearly smooth in the holotype. Auricles of right valve sculptured with 5 radial ribs each. Hinge line straight. Byssal fasciole broad, byssal notch rather deep. Functional ctenolium beside ledge of suture, with 6 teeth. Resilifer triangular oblong. Inner surface of both valves somewhat plicate near periphery. Dimensions of holotype: H 43.0 mm, W 41.1 mm, C 11.5 mm. Distribution. — Only known from Bohol, Philippines. Comparison. — Veprichlamys deynzerorum closely resembles V. versipellis Dijkstra & Kastoro, 1997, from Indonesia, but has a more circular shape (V. versipellis is more obliquely ovate posteriorly), and a more irregularly striated microsculpture (V. versipellis has a shagreen microsculpture throughout), and is more brightly coloured. It differs from V. africana Dijkstra & Kilburn, 2001, from southern Mozambique and eastern Transkei (South Africa), by having more secondary, intercalated, radial riblets (nearly lacking in V. africana), stronger developed scales on the ribs (V. africana has weaker and closer placed scales), a weak, shagreen microsculpture in its early growth stage (lacking in V. africana) and a brighter colouring (V. africana is creamy only). It differs from Veprichlamys jousseaumei (Bavay, 1904), known from the tropical western Pacific, by its larger size (height up to 43 mm versus 25 mm in V. jousseaumei), by the shagreen microsculpture (V. jousseaumei has a radial microsculpture), and by the presence of more numerous, secondary, intercalated radial riblets. It differs from Veprichlamys incantata (Hertlein, 1972) from the Galapagos Islands, by its smaller size (V. incantata is c. 55 mm high), its more circular shape (V. incantata is more obliquely oblong), more primary and secondary radial ribs (c. 50), a shagreen microsculpture (V. incantata has c. 25 ribs and radial microsculpture), and a brighter colouring (V. incantata is whitish, creamy or pinkish). It differs from Veprichlamys perillutris (Iredale, 1925) from southeastern Australia, by its larger size (V. perillustris is only c. 35 mm high), a more circular shape (V. perillustris is strongly obliquely oblong), larger posterior auricles, more radial ribs (c. 50), a shagreen microsculpture (V. perillustris has c. 20 ribs and radial microsculpture), and a brighter colouring (V. perillustris is whitish or creamy). It differs from Veprichlamys kiwaensis (Powell, 1933) from New Zealand, by its larger size (V. kiwaensis is only c. 35 mm high), a slightly more circular shape (V. kiwaensis is slightly obliquely ovate), larger posterior auricles, more (c. 30) primary radial ribs (V. kiwaensis has c. 25 primary radial ribs and less secondary ones), and its microsculpture. V. deynzerorum has a radial and a shagreen microsculpture and V. kiwaensis a conmarginal one in the preradial stage (lacking in V. deynzerorum), and a more prominent radial microsculpture throughout. V. deynzerorum is more brightly coloured than V. kiwaensis, which is whitish or creamy only. Etymology. — This new species is named after Al and Bev Deynzer and their son Neal of Sanibel Island (Florida, USA).» HENK H. DIJKSTRA, 2004
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«Type data. — Holotype (H 43 mm, pv) ZMA Moll. 403022, paratype (pv) ZMA Moll. 403023. Type locality: Philippines, Bohol, Calituban Islets, 30-40 m, alive, amongst reef rubble, scuba, v.2003.
Material examined. — Philippines: PANGLAO 2005, Stn CP 2409, 220- 257 m, 3 v.
Description. — Shell thin, up to 43 mm high, weakly inflated, nearly circular and slightly posteriorly oblique, somewhat higher than wide, valves equally convex, nearly
equivalve and equilateral, auricles strongly inequal in shape and size, umbonal angle c. 90˚. Colour basically creambrownish, with small dark and pale brown radials and maculations umbonally, also visible from the inner side. Both valves sculptured with numerous (c. 30 on central part op disc, increasing to c. 50 ventrally), irregularly spaced, squamous radial costae. Interspaces with microscopic radial striae on central part, more antimarginal laterally, early growth stage nearly smooth or weakly reticulated. Anterior auricle of left valve with 8-10 fine squamous radial riblets, posterior with 5, right valve with 5 radial riblets each. Hinge line straight. Byssal notch moderately deep, byssal fasciole broad. Functional ctenolium with 6 denticles. Inner surface of both valves somwhat plicate near periphery. Distribution. — So far only known from the Philippines. Present specimens dead in 220-257 m. The bathymetric range of live-taken specimens is 30-205 m (minimum depth range) (MNHN, ZMA, unpubl. data; Raines & Poppe, 2006: 249, pl. 197 fig. 1). Remarks. — The present specimens are morphologically similar to the type material. A close congener is Veprichlamys versipellis Dijkstra & Kastoro, 1997, known from Indonesia, which is more oblique of shape and has a more prominent intercostal reticulate microsculpture. Waller (2010, pers. comm.) suggested, that both species are representatives of Chlamys rather than of Veprichlamys, mainly based on the presence of shagreen microsculpture. However, this microsculpture is not constanct and also lacking and the intercostal radial and antimarginal microscupture together with the simple radial ribbing are more characters of Veprichlamys.» DIJKSTRA, H. H. 2013. Pectinoidea (Bivalvia: Propeamussiidae and Pectinidae) from the Panglao region, Philippine Islands. Vita Malacologica, 10: 1-108, pls. 1-32. [p. 85, 88]
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Veprichlamys deynzerorum Dijkstra, 2004; H. H. Dijkstra, 2013, Pectinoidea from the Panglao region, Philippine Islands, plate 22, figures 3a-3d; plate 31, figures 2a, 2b.
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«Two species recently described in Veprichlamys, V. versipellis Dijkstra and Kastoro, 1997 from Indonesia (Banda and Arafuru Seas, 225–417 m) and V. deynzerorum Dijkstra, 2004 (Philippines, 34–40 m in reef rubble), are not considered here to be assignable to Veprichlamys because of their ribbing pattern, presence of shagreen microsculpture, and lack of any significant development of linear striae in rib interspaces. They are instead regarded as belonging to Chlamys in a broad sense.»
WALLER, T. R. 2007. The evolutionary and geographic origins on the endemic Pectinidae (Mollusca: Bivalvia) of the Galapagos Islands. Journal of Paleontology, 81 (5): 929–950 [p. 943]
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Veprichlamys deynzerorum Dijkstra, 2004; B. K. Raines & G. T. Poppe, 2006, A Conchological Iconography, The Family Pectinidae, plate 197, figures 1a, 1b.
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