Echinoidea - Spatangoida - Paleopneustidae
Full reference: A. Agassiz. 1904. The Panamic Deep Sea Echini. Memoirs of the Museum of Comparative Zoology at Harvard College 31:1-243
Parent taxon: Paleopneustidea according to A. Kroh and A. B. Smith 2010
See also Grant and Hertlein 1938
Sister taxon: Pericosmidae
Subtaxa: Nacospatangus Paleopneustes Pericosmus
Ecology: slow-moving shallow infaunal deposit feeder-detritivore
Distribution:
• Pliocene of United States (1: California collection)
• Miocene of Australia (1), Austria (1), Costa Rica (1), Cuba (3), Egypt (1), Indonesia (3), Italy (3), Japan (1), New Zealand (8)
• Oligocene of Australia (1), Japan (1)
• Whaingaroan of New Zealand (2)
• Eocene of Cuba (1), New Zealand (1)
• Paleocene of United States (1: California)
Total: 30 collections including 33 occurrences