2003/01/01 by Benjamin P. Kear, Robert J Hamilton-Bruce, Brian J. Smith +1 · 4 citations
Earth and Planetary Sciences · Environmental Science · #Aquatic Invertebrate Ecology and Behavior #Geological Formations and Processes Exploration #Paleontology and Stratigraphy of Fossils
paper · doi:10.1071/mr03003
openalex publication_date 2003/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Viviparus (?) albascopularis Etheridge, 1902 is Australia's oldest documented fossil freshwater gastropod. The taxon was established on the basis of a single opalised shell from the Lower Cretaceous (Aptian) marine deposits of the Wallumbilla Formation (Doncaster Member) at White Cliffs, New South Wales. Reassessment indicates that original placement in the caenogastropod family Viviparidae is justified; however, the specimen is reassigned to the endemic Australian genus Notopala Cotton, 1935 on the basis of shell morphology and close morphometric similarity to extant species. Implications for the origins and current distribution of Australian viviparid taxa are discussed.