Nützel, A.; Pan Hua-Zhang. (2005). Late Paleozoic evolution of the Caenogastropoda: Larval shell morphology and implications for the Permian/Triassic Mass Extinction Event. Journal of Paleontology. 79(6): 1175-1188.
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Nützel, A.; Pan Hua-Zhang
2005
Late Paleozoic evolution of the Caenogastropoda: Larval shell morphology and implications for the Permian/Triassic Mass Extinction Event