†family Oligopygidae Duncan 1889 (sand dollar)

Echinoidea - Clypeasteroida - Oligopygidae

Alternative spelling: Oligopyginae

Full reference: P. M. Duncan. 1889. A revision of the genera and great groups of the Echinoidea. Journal of the Linnean Society, Zoology 23:1-311

Parent taxon: Clypeasteroida according to A. Kroh and A. B. Smith 2010

See also Wagner and Durham 1966

Sister taxa: Botriopygus, Clypeasterina, Conoclypeidae, Durhamella, Faujasiidae, Hesperaster, Laganina, Leniechinus, Lenita, Pentedium, Plesiolampadidae, Proescutella, Prowillungaster, Rotulina, Runa, Scutellina, Tournoueraster, Willungaster

Subtaxa: Haimea Microlampas Oligopygus Protolampas

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Type: Oligopygus

Ecology: slow-moving semi-infaunal detritivore

Distribution:

• Miocene of Cuba (1 collection)

• Oligocene of Cuba (1)

• Eocene of Colombia (1), Cuba (6), Mexico (1), United States (16: Alabama, Florida, Georgia), Venezuela (1)

Total: 27 collections including 34 occurrences

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