Meganodontia acetabulum Bouchet and Cosel, 2004

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 : 595

Meganodontia acetabulum Bouchet and Cosel, 2004

Fig. 6 .

2004 Meganodontia acetabulum sp. nov.; Bouchet and Cosel 2004: 706, figs. 1–3.

Material.— Five specimens from the Pleistocene of Antipolo Point ( NMNS PM 28107 , 28110 , 28112 , 28166 , 28167 ) .

Dimensions (in mm).— NMNS PM 28167 (largest specimen), L = 132.2, H = 120.6.

Remarks.—There is some variation among the available specimens. Whereas specimens NMNS PM 28166 and 28167 are indistinguishable from the holotype of Meganodontia acetabulum , specimens NMNS PM 28110 and 28112 have a slightly more truncate anterodorsal margin, a slightly straighter posterodorsal margin, and a slightly more pointed beak than the holotype. However, we consider all specimens to belong to the extant Meganodontia acetabulum .

Stratigraphic and geographic range.—Early Pleistocene: Leyte, Philippines. Recent: Taiwanese waters.

Figures

Fig. 6. The lucinid bivalve Meganodontia acetabulum Bouchet and Cosel, 2004 from the Pleistocene Antipolo Point seep deposit in Leyte, Philippines. A. NMNS PM 28166, disarticulated left valve; dorsal view (A1), inner (A2) and external (A3) shell surface, close-up on hinge (A4). B. NMNS PM 28107, internal mold; view on left valve showing the elongate adductor muscle scar. C. NMNS PM 28167, articulated specimen; view on outer shell surface of left valve (C1), dorsal view (C2).