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Abstract ▼ AI-Helper

More than 500 specimens of fossil scallops were collected from the Hagjeon Formation and the Duho Formation, Pohang Basin, Korea. The fossils were found as original calcareous shells, and internal and external molds. Most of them were a single separated shell, and specimens with two shells attached ...

More than 500 specimens of fossil scallops were collected from the Hagjeon Formation and the Duho Formation, Pohang Basin, Korea. The fossils were found as original calcareous shells, and internal and external molds. Most of them were a single separated shell, and specimens with two shells attached were also sporadically found. The scallop fossils from the two formations differ each other in composition of species and fossilization types, and they were classified into three groups (small, middle and large scallops) based on the size of the scallop fossils. Two species, Propeamussium tateiwai and Delectopecten peckham, were identified from the small scallop group, and Patinopecten sp. and Patinopecten kimurai ugoensis from the middle and large groups, respectively. Patinopecten kimurai ugoensis and P. tateiwai were interpreted as shallow and a little deep nectonic species, respectively based on the analysis of relationship between scallop morphology and paleoecology. The specimens of P. tateiwai (the most abundant species), despite of a same species, show different morphologies and structures depending on fossilization types, which requires careful understanding on fossilization types and morphological variation.

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