Waisiuconcha sp. 2

Kiel, Steffen, Aguilar, Yolanda M. & Kase, Tomoki, 2020, Mollusks from Pliocene and Pleistocene seep deposits in Leyte, Philippines, Acta Palaeontologica Polonica 65 (3), pp. 589-627 : 614

Waisiuconcha sp. 2

Fig. 27D, E .

Material.— Two specimens from the Pleistocene of Cambantug Point ( NMNS PM 28423 , 28424 ) .

Dimensions (in mm).—NMNS PM 28423, L = 3.5, H = 2.5; NMNS PM 28424, L = 3.5, H = 2.8.

Remarks.—The early Pleistocene Waisiuconcha sp. 2 has a more distinctive lunular incision and more elevated umbones than the late Pliocene Waisiuconcha sp. 1 reported above from Liog-Liog Point.

Figures

Fig. 27. Two species of the vesicomyid bivalve genus Waisiuconcha Beets, 1942, from the late Pliocene (A–C, Liog-Liog Point) and early Pleistocene (D, E, Cambantug Point) seep deposits in Leyte, Philippines. A–C. Waisiuconcha sp. 1. A. NMNS PM 28420, articulated specimen, dorsal view showing lunular incision (A1), view on outer side of left valve (A2). B. NMNS PM 28421, articulated specimen with partically removed shell, view on outer side of left valve B1), anterior view showing anterior adductor muscle scars (B2). C. NMNS PM 28422, isolated left valve, showing hinge dention. D, E. Waisiuconcha sp. 2. D. NMNS PM 28423, an isolated right valve partially embedded in rock matrix, showing hinge dentition (D1), view on outer side (D2), in dorsal view showing lunular incision (D3). E. NMNS PM 28424, an isolated left valve, showing hinge dention (E1) and irregular outer surface sculpture (E2).