Mimachlamys albolineata (G. B. Sowerby II, 1842)
SOWERBY II, G. B. 1842. Monograph of the genus Pecten. In: G. B. Sowerby II (Ed.), 1842-1847, Thesaurus conchyliorum; or, monographs of genera of shells, 1 (2): 45-78, pls. 12-20. London. [p. 73, pl. 14, fig. 69]
1842 Pecten albolineatus Sowerby II, 1842
G. B. Sowerby II, 1842, plate 14.
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«85. P. ALBOLINEATUS. (pl. xiv. f. 69.) nob. Zool. Proc. 1842.
T. ovali subtrigonâ, compressâ, aequivalvi; auriculis inaequalibus, posticis minimis, anticis magnis, acutis, sulcatis: costis numerosissimis, aequalibus, subquadratis. Interstitiis Iaevibus. Colore palidissime; luteo valvae dextrae, costis griseo maculatis, valvae sinistrae, costis griseis, lineis albis interruptis, costis tribus albis. Long. 0.93.; lat. 0.25.; alt. 1.19; poll. Differing from P. ornatus in having the ribs more numerous and more equal in both valves. The shell is nearly white, with grey spots on the under valve, and in the upper valve, the tops of all the ribs, excepting three, are grey, the spaces between the white ribs being crossed by narrow lines of white. Brought by Mr. Cuming, from Guimaras, Philippines.» GEORGE BRETTINGHAM SOWERBY II, 1842
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«Description. — Shell up to c. 30 mm high, weakly inflated, almost equally convex, elongate, equivalve, slightly inequilateral, anterior auricles much larger and longer than posterior ones, umbonal angle c. 85-90˚; right valve whitish with black and white streaks on costae; four costae paler, forming widely spaced pale rays; left valve darker than right. Both valves sculptured with c. 30 evenly spaced, narrow, raised, serrated radial costae, subdivided in late ontogeny in a few specimens. Intercostal spaces with narrow commarginal lamellae near ventral margin. Antimarginal microsculpture very weak or even lacking. Anterior auricles with 6-7 prominent squamous radial riblets, posterior ones with 5 narrow squamous radial riblets. Byssal notch moderately deep, byssal fasciole rather broad. Functional ctenolium well-developed, with 5-6 teeth. Weak internal rib carinae near margin. Moderate resilial and dorsal teeth.
Distribution. — Tropical Indo-West Pacific, from southern Japan southwards to Australia, westwards into the Indian Ocean in the Bay of Bengal, and eastwards into the Pacific to the Fiji Islands (Raines & Poppe, 2006: 268). Present specimen from the Philippines alive intertidally to 6 m (minimum depth range). Bathymetric range of live-taken specimens is intertidally to 40 m (minimum depth range) (ZMA, unpubl. data). Living byssally attached to rocks or coral or amongst coral rubble, most specimens on sandy bottoms. Remarks. — The present specimens from the Philippines are morphologically indistinguishable from the type material.» 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. 89]
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Mimachlamys albolineata (G.B. Sowerby 2nd, 1842); H. H. Dijkstra, 2013, Pectinoidea from the Panglao region,
plate 19, figures 4a-4b; plate 23, figures 1a-1d. |