Family Iridinidae Swainson 1840 (clam)
Bivalvia - Unionida - Iridinidae
Synonym: Pleiodontidae Rochebrune 1904
Parent taxon: Mullerioidea according to J. G. Carter et al. 2011
See also Bieler and Mikkelsen 2006 and Bouchet et al. 2010
Sister taxa: Etheriidae, Mulleriidae
Subtaxa: Aspathariinae Iridininae Pleiodon
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of the Congo-Kinshasa (2 collections), Niger (3), Sudan (4)
• Pliocene to Pleistocene of the Congo-Kinshasa (7), Uganda (1)
• Pliocene of Malawi (1), Tanzania (1)
• Miocene to Pliocene of Tanzania (2)
• Cretaceous of United States (1: Montana)
Total: 22 collections including 36 occurrences