Plagiochasma (sea urchin)

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: Catopygus, Clypeopygus, Hemicara, Heteronucleus, Hypopygurus, Nucleolites, Oolopygus, Phyllobrissus, Pseudonucleus, Pseudosorella, Pygaulus, Pygopistes, Pygorhynchus

Subtaxa: Plagiochasma cruciferum Plagiochasma lammersmaxi Plagiochasma olfersii

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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 France (24), the Netherlands (1), Portugal (1), Switzerland (1)

Total: 40 collections including 41 occurrences

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Specimen images are retrieved through the ePANDDA API.


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