Rhynchonellata - Terebratulida - Megathyrididae
Parent taxon: Megathyridoidea according to M. A. Bitner and A. Müller 2017
See also Emig et al. 2013 and Williams et al. 2006
Sister taxa: Praeargyrothecidae, Thaumatosiidae
Subtaxa: Argyrotheca Borellithyris Bronnothyris Joania Megathiris Phragmothyris
Type: Megathiris
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Quaternary of Barbados (3 collections), France (1), Greece (1), Italy (6), Jamaica (4)
• Pliocene of Algeria (1), Cuba (1), the Dominican Republic (14), Spain (4)
• Miocene of Algeria (5), Austria (2), Bulgaria (3), Cuba (4), Cyprus (1), the Czech Republic (6), Germany (3), Hungary (3), Indonesia (1), Iran (2), Italy (8), Malta (2), Morocco (2), New Zealand (5), Poland (39), Romania (1), Slovenia (1), Syria (1)
• Oligocene of Antigua and Barbuda (1), Cuba (2), France (5), Germany (9), Iran (1), Puerto Rico (2)
• Eocene of Austria (10), Cuba (10), France (14), Germany (2), Hungary (6), New Zealand (2), North Atlantic (1), Peru (1), Spain (4), Tonga (1), Ukraine (1), the United Kingdom (3), United States (6: North Carolina, South Carolina)
• Paleocene of Denmark (17), France (1), Germany (1), Spain (3), United States (4: Alabama, New Jersey, Texas)
• Cretaceous of Belgium (33), Cuba (1), Denmark (7), Germany (2), the Netherlands (2), Poland (4), the United Kingdom (20)
• Jurassic of United States (1: California)
Total: 301 collections including 509 occurrences