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: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/geodivers…
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. This study presents detailed descriptions and images of fossil freshwater molluscan assemblage from Taiwan, providing insights into the origins of contemporary freshwater biodiversity in the subtropical West Pacific. Additionally, in several fossil S. quadrata specimens, juvenile shells were found within female shells, marking the second known case of child-carrying in fossil viviparids.
GBIF url: https://www.gbif.org/dataset/bc31c346-a5d1-4e3c-9cff-574f7c993517
Homepage: https://tb.plazi.org/GgServer/summary/FC23E85D223CBE67FFCA5A0349354F6D
Citation: Hsu C, Osipova D, Lin C, plazi (2025). Fossil freshwater mollusks from the Early Pleistocene (Calabrian) of northern Taiwan. Plazi.org taxonomic treatments database. Checklist dataset https://doi.org/10.15468/tsky5c accessed via GBIF.org on 2026-04-08.