Propeamussiidae Abbott, 1954

Kiel, Steffen, Hybertsen, Frida, Hyžný, Matúš & Klompmaker, Adiël A., 2020, Mollusks and a crustacean from early Oligocene methane-seep deposits in the Talara Basin, northern Peru, Acta Palaeontologica Polonica 65 (1), pp. 109-138 : 112

Family Propeamussiidae Abbott, 1954 Propeamussiidae indet.

Fig. 2D .

Material.— One specimen ( NRM Mo187004) from the Oligocene Cerro La Salina block 6, northern Peru .

Remarks.—The single specimen lacks ears and cannot be determined to the genus-level. Propeamussiids, also known as mud pecten”, are common dwellers of muddy sediments in deeper water and have been reported from several fossil seep deposits ( Kelly et al. 2000; Kiel et al. 2008; Kiel 2010) and wood falls ( Kiel and Goedert 2006a, b; Amano et al. 2018a).

Figures

Fig. 2. Protobranch and pteriomorph bivalves from early Oligocene seep deposits from the Cerro La Salina (block 1, A; block 6, D; block 9, C) and Belén seep deposit (B), Talara Basin, northern Peru. A. Malletiid Neilo altamirano sp. nov. (NRM Mo187001, holotype), internal mold in lateral view (A1); external mold in lateral view (A2), arrows indicating the posterior ridge; view on the dorsal side (A3); close-up on the taxodont hinge dentition (A4). B. The possible nuculid Acila? sp. (NRM Mo187002), external mold of outer shell surface. C. The bathymodiolin Idas sp. (NRM Mo187003), internal mold of the entire specimen (C1), arrow indicating the taxondont teeth; close-up on taxodont teeth on posterodorsal shell margin (C2). D. Propeamussiidae indet. (NRM Mo187004), uncoated specimen showing internal radial ridges (D1); specimen coated with ammonium-chloride, highlighting external sculpture (D2).