Fossil freshwater mollusks from the Early Pleistocene (Calabrian) of northern Taiwan

This dataset contains the digitized treatments in Plazi based on the original journal article Hsu, Chia-Hsin, Osipova, Diana, Lin, Chien-Hsiang (2025): Fossil freshwater mollusks from the Early Pleistocene (Calabrian) of northern Taiwan. Geodiversitas 47 (20): 721-737, DOI: 10.5252/geodiversitas2025v47a20, URL: sciencepress.mnhn.fr/sites/default/files/articles/pdf/geodiversitas2025v47a20.pdf ABSTRACT Despite the extensive fossil mollusk records in Taiwan, over 99% are marine species.

Among the few freshwater deposits, the Tananwan Formation (1.46-1.24 Ma) in northern Taiwan has been recognized as one of the most prolific fossiliferous strata. In a 1-meter thick fossiliferous mudstone layer within the formation, we identified five molluscan taxa. The assemblage is primarily dominated by Sinotaia quadrata (Benson, 1842) and the less common Melanoides aff. tuberculata, which corresponds to the current freshwater ecosystem in northern Taiwan.