« A. secreta is a deep-shelf species, probably spreading into upper bathyal depths […] Shell small, moderately thick. Outline subrectangular to slightly trapezoidal. Dorsal margin long, straight. Ventral margin gently sloping to almost straight, faintly sinuosus. Anterior margin curving into the ventral one. Posterior margin gently sloping, generally frilled. Postero-ventral junction subacute to rounded. Umbo anterior, prosogyrate. Posterior keel well-defined. Concentric scultpure of slightly imbricated lamellae, becoming shortly projecting on the keel, and radially nodulose on the postero-dorsal area. Radial riblets making the lamellae crenulate to nodulose. Hinge-plate moderately thin, with a wide endentulous gap. Three short anterior and six oblique posterior teeth in the holotype. Dorsal area narrow, becoming wider in gerontic specimens. Adductor scars unequal, faintly ridged, the posterior slightly larger than the anterior one. Byssus retractor scar elongate, almost as long as the posterior tooth row. […] Colour cream with darker radial bands, to evenly light brown. […] Variability mainly involves the valve outline (more or less trapezoidal) and the keel sculpture (fluted to slightly foliate or vesicular). Shell deformations are frequent. Distribution: Recent, Central Mediterranean. » – R. La Perna: “On Asperarca Sacco, 1898 (Bivalvia, Arcidae) and two new mediterranean species”, Boll. Mal. 33, Roma, 1998 via BHL.