Parent taxon: Scapharca according to E. J. Moore 1983
See also Dockery 1982 and Maury 1917
Sister taxa: Anadara (Anadara), Anadara (Lunarca), Anadara (Mabellarca), Anadara (Rasia), Anadara (Tegillarca), Anadara aequatorialis, Anadara aequicostata, Anadara baughmani, Anadara callicestosa, Anadara campsa, Anadara concinna, Anadara congesta, Anadara craticulata, Anadara crebricostata, Anadara cretacea, Anadara dasia, Anadara daviesi, Anadara fichteli, Anadara firmata, Anadara formosa, Anadara garoensis, Anadara gourae, Anadara guayubinica, Anadara halidonata, Anadara hermidermos, Anadara jacksoni, Anadara kroensis, Anadara macneili, Anadara magnoliana, Anadara molengraaffii, Anadara montereyana, Anadara mummi, Anadara nugax, Anadara nux, Anadara obesa, Anadara obliquidens, Anadara osmonti, Anadara panensis, Anadara perlabiata, Anadara preangerensis, Anadara prephina, Anadara protracta, Anadara quilonensis, Anadara reinharti, Anadara riogurabonica, Anadara suboblonga, Anadara trilineata, Anadara tuberculosa, Anadara uropigimelana, Anadara woodringi, Arca (Anadara) heterosculpta, Anadara (Sectiarca) inaequilateralis, Anadara (Sectiarca) marksi, Anadara (Sectiarca) margaretae, Anadara (Sectiarca) riogurabonica, Anadara (Sectiarca) henekeni, Anadara (Sectiarca) floridana, Scapharca vanwinkleae, Scapharca eusphaera, Scapharca tjilanangensis, Scapharca broughtoni, Arca (Scapharca) aguadica, Scapharca axelolssoni, Scapharca inaequivalvis, Scapharca satowi, Anadara (Scapharca) inaequivalvis, Anadara (Scapharca) labiosa, Arca (Scapharca) ecuadoriana, Scapharca sedanensis, Arca (Scapharca) wheeleri, Scapharca crassissima, Scapharca meroensis, Scapharca rustica, Anadara (Scapharca) cepoides, Scapharca cornea, Arca (Scapharca) collazica, Arca (Scapharca) sansebastiana, Scapharca pinguescens, Scapharca chemnitzii, Anadara (Scapharca) spiekeri, Scapharca terhaari, Scapharca zorritosensis, Scapharca pertenuicosta, Arca (Scapharca) weeksi, Arca (Scapharca) hopkinsi, Scapharca crashleyi, Anadara (Scapharca) aviculaeformis, Anadara (Cunearca) boggsi, Scapharca (Cunearca) hamelini, Anadara (Cunearca) brasiliana, Anadara (Cunearca) zorritoensis, Arca (Cunearca) cumanensis, Anadara (Cunearca) bifrons, Scapharca (Cunearca) vanderhoofi, Anadara (Cunearca) hindsi, Scapharca (Cunearca) rivulata, Scapharca (Cunearca) crandalli, Anadara (Cunearca) pittieri, Scapharca (Cunearca) rhombea, Anadara (Cunearca) berjadinensis, Anadara (Cunearca) telemba, Anadara (Cunearca) chemnitzioides, Anadara (Cunearca) lloydi, Scapharca (Cunearca) melloi, Scapharca (Cunearca) cumanensis, Anadara (Cunearca) rhombea, Arca (Cunearca) cacica, Anadara (Cunearca) buenavista, Cunearca lesueuri, Diluvarca (Cunearca) cardioides, Anadara (Cunearca) ferruginea, Scapharca (Cunearca) santaclarana, Anadara (Cunearca) caimitaca, Cunearca scalaris, Cunearca scalarina, Arca (Cunearca) esmeralda, Anadara (Cunearca) zorritensis, Anadara (Cunearca) melita, Anadara (Cunearca) cacica, Anadara (Cunearca) riocanensis, Anadara (Cunearca) corcupidonis, Cunearca silverdalensis, Anadara (Cunearca) inutilis, Anadara (Cunearca) hispaniolana, Imparilarca hubbardi, Larkinia multicostata, Anadara (Larkinia) sellardsi, Larkinia larkinii, Larkinia grandis, Larkinia camuloensis, Larkinia santana, Anadara (Larkinia) transversa, Anadara (Larkinia) notabilis, Anadara (Tosarca) columba, Anadara (Tosarca) campta, Anadara (Tosarca) veatchi, Anadara (Tosarca) tosaensis, Anadara (Grandiarca) patriarcha, Anadara (Grandiarca) usiacurii, Anadara (Grandiarca) chiriquiensis, Anadara (Grandiarca) garitensis, Anadara (Grandiarca) patricia, Potiarca bonplandiana, Anadara (Potiarca) saladillaensis, Arca (Senilia) senilis, Anadara (Caloosarca) crassicosta, Anadara (Caloosarca) biangulata, Anadara (Caloosarca) notoflorida, Anadara (Caloosarca) hoerleae, Anadara (Caloosarca) aequalitas, Anadara (Caloosarca) mompicha, Anadara (Caloosarca) rustica
Subtaxa: Scapharca (Scapharca) cordicosta Scapharca (Scapharca) delicatula Scapharca (Scapharca) diluvii Scapharca (Scapharca) gendinganensis Scapharca (Scapharca) geyleri Scapharca (Scapharca) hulshofi Scapharca (Scapharca) invidiosa Scapharca (Scapharca) multiformis Scapharca (Scapharca) obispoana
Ecology: facultatively mobile semi-infaunal suspension feeder
Distribution:
• Quaternary of Italy (3 collections), Spain (1)
• Pliocene of Algeria (2), Cyprus (1), Greece (3), Indonesia (3), Italy (3), the Philippines (1), Spain (4)
• Miocene to Pliocene of Indonesia (2)
• Miocene of Belgium (9), Brazil (1), Bulgaria (6), Cyprus (1), France (1), Germany (39), Greece (2), Indonesia (7), Italy (5), Morocco (5), the Netherlands (1), Poland (3), Romania (1), Slovakia (1), Spain (1), United States (7: California)
• Oligocene of Austria (1), Hungary (2), United States (23: Mississippi)
Total: 139 collections including 140 occurrences