Mimachlamys cloacata (Reeve, 1853)
REEVE, L. A. 1852-1853. Monograph of the genus Pecten.
In: Conchologia Iconica: or illustrations of the shells of molluscous animals ,
vol. 8. London [unnumbered
pages], pls. 1-35. [pl. 34, fig. 166]
1842 Pecten rugosus G. B. Sowerby II, 1842
1853 Pecten cloacatus Reeve, 1853
1888 Pecten valdecostatus Melvill, 1888
1912 Pecten (Chlamys) pelseneeri Dautzenberg & Bavay, 1912 [nomen novum pro Pecten rugosus G. B. Sowerby II, 1842]
1939 Mimachlamys curtisiana Iredale, 1939
1853 Pecten cloacatus Reeve, 1853
1888 Pecten valdecostatus Melvill, 1888
1912 Pecten (Chlamys) pelseneeri Dautzenberg & Bavay, 1912 [nomen novum pro Pecten rugosus G. B. Sowerby II, 1842]
1939 Mimachlamys curtisiana Iredale, 1939
L. A. Reeve, 1852-1853, plate 34.
|
«PECTEN CLOACATUS. Pect. testa trigono-ovata, subflabelliformi, subventricosa, aequivalvi, aequilaterali, valvis costis sedecim radiatis, costis elevatis, rotundatis, subnodoso-crenatis, subdistantibus, lateribus interstitiisque excavatis; alba, cinereo-carneo tincta et maculata; auriculis inaqualibus.
THE GUTTERED PECTEN. Shell triangularly ovate, somewhat fan-shaped, rather ventricose, equivalve, equilateral, valves rayed with sixteen ribs, which are raised, rounded, subnodosely crenated and rather distant, with the sides and interstices excavated; white, stained and spotted with ash-flesh colour; ears unequal. Hab. Philippine Islands. An extremely characteristic species, quite distinct from any hitherto described.» LOVELL AUGUSTUS REEVE, 1853
|
«Description. — Shell up to c. 35 mm high, rather solid, moderately inflated, almost equally convex, triangularly ovate, equivalve, slightly inequilateral, anterior auricles much larger and longer than posterior ones, umbonal angle c. 75-85˚; colour polychromatic. Both valves sculptured with c. 16-18 evenly spaced, narrowly rounded, lamellate, primary radial costae, in a few specimens flanked by secondary riblets in late growth stage. Commarginal lamellae on costae of most specimens, widely to more closely spaced, present in radial interspaces of some specimens. Intercostal “herringbone” microsculpture on disc, in late growth stage transformed into antimarginal microsculpture. Anterior auricle of left valve with 6-7 prominent radial costae with closely spaced intercostal commarginal lamellae; posterior auricle with c. 5 weak, squamous radial riblets and intercostal granular or antimarginal microsculpture, or with closely spaced irregular commarginal lamellae. Anterior auricle of right valve with c. 5 prominent squamous radial costae, weaker and narrower on posterior auricle. Byssal notch deep, byssal fasciole rather broad. Functional ctenolium well-developed, with c. 5-7 teeth. Internal rib carinae weak. Resilial and dorsal teeth prominent.
Distribution. — Tropical Indo-West Pacific, from southern Japan, southwards to northern Australia, westwards into the Indian Ocean to the Gulf of Bengal, and eastwards to New Caledonia (Raines & Poppe, 2006: 270). Present specimen from the Philippines alive in 87-111 m. Living byssally attached to undersides of rocks or coral boulders, or amongst coral rubble on sandy bottoms. Specimens often encrusted with sponge. Remarks. — The present specimens from the Philippines are morphologically similar to the type material. This species has a polymorphic microsculpture (see description) and also varies in convexity (moderately to rather strongly inflated) and macrosculpture (prominence of the radial sculpture and development of the lamellae).» DIJKSTRA, H. H. 2013. Pectinoidea (Bivalvia: Propeamussiidae and Pectinidae) from the Panglao region, Philippine Islands. Vita Malacologica, 10: 1-108, pls. 1-32 pls, 2 tabs. [p. 92]
|
Mimachlamys cloacata (Reeve, 1853); H. H. Dijkstra, 2013, Pectinoidea from the Panglao region, pl. 23, figs. 2a-2c.
|