Parent taxon: Cassiduloida according to A. Kroh and A. B. Smith 2010
See also Grant and Hertlein 1938
Sister taxa: Astropygaulus, Bothryopneutes, Calilampus, Centropygus, Claviaster, Clypeanthus, Conoclypeus, Echinanthus, Eogaleropygus, Gitolampas, Harduinia, Laticlypus, Lovenilampas, Neolampadina, Ovulechinus, Platypygus, Procassidulus, Pygurostoma, Stegopygus
Subtaxa: Cassidulidae
Ecology: slow-moving semi-infaunal detritivore
Distribution:
• Quaternary of United States (4: Florida collections)
• Pliocene of United States (1: Florida)
• Hemphillian of United States (1: Alabama)
• Miocene to Pliocene of United States (1: Florida)
• Miocene of Brazil (2), Mexico (1), United States (2: Florida, North Carolina)
• Oligocene to Miocene of United States (2: Florida)
• Oligocene of Cuba (3), United States (29: Alabama, Florida, Georgia, North Carolina)
• Eocene of Colombia (1), Egypt (1), Germany (1), Peru (1), United States (29: California, Florida, Georgia, North Carolina, South Carolina)
• Paleocene of Denmark (1), Nigeria (1), United States (4: Alabama, Georgia)
• Cretaceous to Paleogene of the Netherlands (2)
• Cretaceous of Belgium (6), Brazil (1), Cuba (1), France (30), Jamaica (1), the Netherlands (7), Oman (4), Saudi Arabia (1), Spain (4), the United Kingdom (17), United States (12: California, Mississippi, New Jersey, Texas)
Total: 171 collections including 224 occurrences