Bivalvia - Ostreida - Malleidae
Alternative spellings: Isognomidae, Isognomonidae
Synonyms: Pedalionidae Stephenson 1923, Pernidae Bohm 1926
Parent taxon: Malleidae according to J. G. Carter et al. 2011
See also Bieler and Mikkelsen 2006, Bohm 1926, Bouchet et al. 2010, Chiesa et al. 1995, Coan et al. 2000, Fraser et al. 2004, Hickman 2023, Nevesskaja 2009, Newell 1965, Ros-Franch et al. 2014, Scholz et al. 2008, Spencer et al. 2004, Stilwell 1998, Vokes 1980 and Ward 1992
Sister taxa: Aviculovulsa, Bouleigmus, Chalmasia, Heligmina, Heligmopsis, Malleinae, Malleus, Malvufundus, Nayadina, Ostreinella, Pseudoheligmus, Pulvinitinae, Vulsella, Vulsellina, Stefaniniella, Euphenax, Heligmus
Subtaxa: Bathyisognomon Crenatula Crenatulinae Gervilleioperna Isognomon Leproconcha Linsdallia Lithiotis Melininae Mytiloperna Pedalion Pernariinae Rostroperna Waagenoperna Yunshanoperna
Distribution:
• Quaternary of Cuba (2 collections), Ecuador (1), Jamaica (2), Japan (2), Mexico (1), Panama (1), South Africa (2), United States (6: Florida, Hawaii)
• Pliocene to Pleistocene of United States (1: Florida)
• Pliocene of Colombia (1), the Dominican Republic (1), Jamaica (2), Panama (2), South Africa (6), United States (3: Virginia)
• Miocene to Pliocene of Chile (1)
• Miocene of Algeria (4), Argentina (5), Austria (8), Chile (1), France (2), Greenland (1), Japan (1), Morocco (2), New Zealand (1), Panama (1), Peru (1), Poland (3), United States (55: California, Delaware, Florida, Maryland, New Jersey, North Carolina, Virginia)
• Oligocene to Miocene of Argentina (1)
• Oligocene of Austria (2), Germany (3), United States (3: Oregon)
• Eocene of Argentina (1), France (1), Japan (8), United States (8: California, Washington)
• Paleocene to Eocene of Pakistan (1)
• Paleogene of Japan (1)
• Paleocene of Belgium (1), China (1), France (1), United States (4: Alabama, South Carolina, Texas)
• Cretaceous of Argentina (3), Bulgaria (1), Chile (1), China (1), Germany (2), India (1), Italy (1), Japan (14), Lebanon (1), Madagascar (1), Mexico (1), New Zealand (5), Nigeria (1), Peru (1), the Russian Federation (5), Serbia and Montenegro (1), South Africa (2), Spain (1), Sweden (3), Turkmenistan (1), USSR (1), the United Kingdom (5), United States (20: Alabama, Alaska, California, Georgia, North Carolina, Tennessee)
• Heterian of New Zealand (1)
• Temaikan of New Zealand (1)
• Jurassic of Algeria (1), Argentina (22), Canada (5: British Columbia), Chile (32), China (7), France (28), Germany (5), Greenland (84), Hong Kong (1), India (9), Indonesia (2), Iran (3), Italy (4), Japan (3), Luxembourg (1), Madagascar (1), Mexico (1), Morocco (1), Oman (1), Poland (1), Portugal (56), Romania (4), the Russian Federation (2), Saudi Arabia (1), Slovenia (3), Spain (5), Switzerland (2), Tunisia (21), the United Kingdom (51), United States (27: California, Nevada, Oregon, Utah, Wyoming)
• Triassic of Austria (5), Germany (1), Hungary (4), Iran (2), Italy (5), Japan (4), Spain (1)
• Permian of China (3)
Total: 639 collections including 684 occurrences