Alternative combination: Arca (Scapharca) fissicosta
Belongs to Anadara (Rasia) according to W. P. Woodring 1973
Sister taxa: Anadara (Rasia) actinophora, Anadara (Rasia) andrewsi, Anadara (Rasia) athroa, Anadara (Rasia) bravardi, Anadara (Rasia) carmenensis, Anadara (Rasia) cercadica, Anadara (Rasia) charcoazulensis, Anadara (Rasia) concinna, Anadara (Rasia) corcupidonis, Anadara (Rasia) cornellana, Anadara (Rasia) costaricensis, Anadara (Rasia) dariensis, Anadara (Rasia) democraciana, Anadara (Rasia) emarginata, Anadara (Rasia) formosa, Anadara (Rasia) golfoyaquensis, Anadara (Rasia) guayubinica, Anadara (Rasia) honensis, Anadara (Rasia) inaequilateralis, Anadara (Rasia) lienosa, Anadara (Rasia) lita, Anadara (Rasia) medioamericana, Anadara (Rasia) mirandana, Anadara (Rasia) mississippiensis, Anadara (Rasia) sechurana, Anadara (Rasia) springvalensis, Anadara (Rasia) tamarana, Anadara (Rasia) tirantensis, Anadara (Rasia) wiedenmayeri, Anadara (Rasia) zuliana, Rasia arata
Type specimen: USNM 562365, a shell
Ecology: facultatively mobile epifaunal suspension feeder