Alternative spelling: Leptonacea
Parent taxon: Veneroida according to R. Marquet 2005
See also Dockery 1982, Glenn 1904, Maxwell 1992, Nevesskaja 2009 and Newell 1965
Sister taxa: Adansonella, Aliodonax, Andrusovicardium, Aphaea, Arcticina, Bungoella, Carditacea, Carditellopsis, Caspimactra, Chartocardium, Chlamydoconchacea, Corbiculoidea, Corbuloidea, Cryptocoelopis, Cterocardia, Cypricardella, Cyrenoidoidea, Dacicardium, Dobrogimactra, Dreissenoitei, Ergenica, Farisia, Fischericardium, Fuscocardium, Geoffbondia, Glycydonta, Hubeiconcha, Kellielloidea, Korobkoviella, Leporimetus, Leukomoides, Leuroactis, Liromissus, Loxoglypta, Lucinina, Luniulicardia, Luxuridacna, Mancosinodia, Mesochione, Miricardium, Neotapes, Neovenerella, Nilobia, Nipponomarcia, Olssonella, Osoinia, Paraarctica, Patagocardia, Plicatiforma, Protagelus, Pseudoarcopagia, Pseudopermorphus, Rochella, Sarmaticardium, Sarmatidonax, Scrobicularioidea, Siungiudella, Sublandinia, Subvenericardia, Taiwancorbicula, Taiwanobarnea, Tancretella, Tentidonox, Tenuimactra, Tivellina, Tridacnoidea, Trigonocrassatella, Urbnisia, Venericardiella, Veneroitei, Verchojanogrammysia
Subtaxa: Erycinidae Kelliidae Montacutidae
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of Antarctica (3 collections), Argentina (2), Australia (2), Belgium (1), Canada (1: Quebec), Ecuador (1), Greenland (1), Japan (1), Jordan (1), Morocco (1), the Netherlands (3), New Zealand (1), the Philippines (1), South Africa (2), Thailand (1), the United Kingdom (8), United States (37: Alaska, California, Florida, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Virginia)
• Pliocene to Pleistocene of Ecuador (1)
• Pliocene of Belgium (6), Greece (1), Holy See (Vatican City State) (1), Indonesia (1), Italy (1), Jamaica (4), Panama (2), South Africa (1), the United Kingdom (3), United States (5: North Carolina, Virginia), Venezuela (3)
• Miocene of Australia (4), Belgium (2), Bulgaria (1), Denmark (1), the Dominican Republic (1), Ecuador (1), France (1), Germany (7), India (1), Indonesia (1), Italy (2), the Netherlands (2), New Zealand (3), Panama (2), Poland (2), United States (17: Florida)
• Oligocene to Miocene of United States (1: Florida)
• Oligocene of France (2), United States (6: Mississippi, Oregon)
• Eocene of Antarctica (2), Belgium (2), France (2), New Zealand (1), the United Kingdom (4), United States (17: Alabama, Georgia, Mississippi, Texas)
• Paleocene to Eocene of Australia (1)
• Paleocene of Australia (1), Belgium (1), Poland (1), United States (7: Alabama, Texas)
• Cretaceous of Denmark (1), New Zealand (2), United States (3: California)
Total: 198 collections including 304 occurrences