A diverse early Miocene (Burdigalian) turritelline-dominated gastropod assemblage from the Dwarka Basin of Kathiawar Peninsula, western India

Abstract A diverse early Miocene (Burdigalian) turritelline-dominated assemblage (TDA) is documented from a single bed of the Nandana Member of the Gaj Formation, Dwarka Basin, western India. This study reports 42 gastropod species, including the description of four new species: ? Clelandella saurashtraensis n. sp., Jujubinus dwarkaensis n. sp., Cerithium bardhani n. sp., and Nassarius anisi n. sp. In addition, 30 species are discussed under open nomenclature. The TDA assemblage is notable for the high diversity among turritelline gastropods, with eight species identified across two genera, Turritella and Haustator. Petrographic studies and the foraminifera associations of Lockhartia sp., Miogypsina sp., Operculina sp., Quinqueloculina sp., and Ammonia sp., along with other foraminiferal groups such as nodosariids, milliolids, and rotalids, suggest that the TDA bed was deposited in tropical, warm, nutrient-rich, well-oxygenated conditions in subtidal–intertidal conditions. UUID: http://zoobank.org/a12f5cac-1293-40c3-b0fb-a0147d657514