On the nature of the holotype of Nipterella paradoxica (Billings) Fieldiana, Geology, Vol.16, No.11
The holotype of Nipterella paradoxica (Billings), based on Calathium paradoxicum Billings, 1865, is not a sponge but a cherty concretion. The name Nipterella paradoxica is thus a nomen nudum and should be rejected Includes bibliographical references (p. 295) The holotype of Nipterella paradoxica (Billings), based on Calathium paradoxicum Billings, 1865, is not a sponge but a cherty concretion. The name Nipterella paradoxica is thus a nomen nudum and should be rejected Fieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Museum (1945-1966) and Field Museum of Natural History (1966-)
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