Malacostraca - Decapoda - Mathildellidae
Full reference: H. Karasawa and H. Kato. 2003. The family Goneplacidae MacLeay, 1838 (Crustacea: Decapoda: Brachyura): Systematics, phylogeny, and fossil records. Paleontological Research 7(2):129-151
Parent taxon: Goneplacoidea according to C. E. Schweitzer et al. 2022
Sister taxa: Acidopsidae, Carinocarcinoididae, Chasmocarcinidae, Conleyidae, Euryplacidae, Goneplacidae, Litocheiridae, Magyarcarcinidae, Martinocarcinidae, Progeryonidae, Scalopidiidae, Vultocinidae
Subtaxa: none
Ecology: infaunal carnivore
Distribution:
• Oligocene to Miocene of United States (1: Washington collection)
• Oligocene of Canada (1: British Columbia), Italy (2), United States (4: Alaska, Oregon, Washington)
• Eocene of Italy (8), Japan (1), Mexico (1), the United Kingdom (4), United States (5: Oregon, Washington)
• Paleocene to Eocene of United States (1: Alaska)
• Paleogene of Hungary (1), Mexico (1)
• Paleocene of Mexico (1), United States (2: Texas)
• Cretaceous of Mexico (3), USSR (1), Uzbekistan (1)
Total: 38 collections including 44 occurrences