Lamylucina, Cosel, 2006

Cosel, Rudo von, 2006, Taxonomy of tropical West African bivalves. VI. Remarks on Lucinidae (Mollusca, Bivalvia), with description of six new genera and eight new species, Zoosystema 28 (4), pp. 805-851 : 807

Genus Lamylucina n. gen.

TYPE SPECIES. — Phacoides (Lucinoma) gaini Lamy, 1920 .

SPECIES INCLUDED. — Lamylucina gaini ( Lamy, 1920) n. comb.; Lamylucina exgaini n. sp.

ETYMOLOGY. — In memory of Édouard Lamy, who was the first “modern” revisor of Lucinidae and who described the type species of this genus.

DISTRIBUTION. — Tropical West Africa.

DIAGNOSIS. — Shells small, up to 20 mm, subcircular to circular, very compressed. Beaks small, almost median or slightly in front of the vertical midline. Surface with fine, more or less widely spaced to contiguous commarginal ridges or lamellae, some of them becoming more or less lamellate on the antero- and postero-dorsal margin. Posterior area delimited by a shallow radial depression. Lunule very short and broad, escutcheon very long and narrow. Inner margin smooth. Hinge with one small cardinal tooth in the right valve and two in the left valve, often very weak to almost obsolete. No lateral teeth. Ventral prolongation of the anterior adductor scar rather long but small and narrow.

REMARKS

This genus is distinguished from other Lucinidae by the extremely flat valves, the long but narrow diverging part of the anterior adductor scar, the small umbo, the regular commarginal sculpture and the more or less leafy prolongations of the commarginal ridges on the dorsal margin. The most closely similar genus may be Lamellolucina Taylor & Glover, 2002 , which has more tumid shells, more widely spaced lamellae, a crenulate margin and a shorter diverging part of the anterior adductor scar. That genus is mainly Indo-Pacific with L. reyrei (Nicklès, 1955) being the only tropical West African species.