Alternative spelling: Grandiarca
Parent taxon: Anadara according to J. A. Todd 2001
See also Coan et al. 2000, Moore 1983 and Sepkoski 2002
Sister taxa: Anadara (Anadara), Anadara (Caloosarca), Anadara (Cunearca), Anadara (Diluvarca), Anadara (Esmerarca), Anadara (Larkinia), Anadara (Lunarca), Anadara (Mabellarca), Anadara (Potiarca), Anadara (Rasia), Anadara (Sectiarca), Anadara (Tegillarca), Anadara (Tosarca), 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
Subtaxa: Anadara (Grandiarca) chiriquiensis Anadara (Grandiarca) garitensis Anadara (Grandiarca) patriarcha Anadara (Grandiarca) patricia Anadara (Grandiarca) usiacurii
Ecology: facultatively mobile semi-infaunal suspension feeder
Distribution:
• Pliocene of Colombia (6 collections), the Dominican Republic (2)
• Miocene to Pliocene of the Dominican Republic (1)
• Miocene of Colombia (12), the Dominican Republic (1), Ecuador (2), Haiti (2), Panama (15), Peru (4), Trinidad and Tobago (2), Venezuela (1)
• Oligocene to Miocene of Haiti (1)
• Oligocene of Haiti (1)
Total: 50 collections including 58 occurrences