Echinoidea - Irregularia - Nucleolitidae
Synonyms: Dochmostoma Duncan 1891, Trematopygus d'Orbigny 1857 [objective synonym]
Parent taxon: Nucleolitidae according to P. M. Kier 1966
See also Clark and Twitchell 1915, Cooke 1942, Kier 1962, Sepkoski 2002 and Smith 2009
Sister taxa: Clypeopygus, Hemicara, Heteronucleus, Hypopygurus, Nucleolites, Oolopygus, Phyllobrissus, Pseudonucleus, Pseudosorella, Pygaulus, Pygopistes, Pygorhynchus
Subtaxa: Plagiochasma cruciferum Plagiochasma lammersmaxi Plagiochasma olfersii Plagiochasma orientalis
Ecology: epifaunal grazer-deposit feeder
Distribution:
• Paleocene of Austria (1 collection), Denmark (1), United States (10: Alabama, Georgia, New Jersey)
• Cretaceous to Paleogene of the Netherlands (1)
• Cretaceous of Egypt (1), France (24), the Netherlands (1), Portugal (1), Switzerland (1)
Total: 41 collections including 42 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.