Alternative combinations: Arca (Scapharca) costaricensis, Arca costaricensis
Full reference: A. A. Olsson. 1922. The Miocene of Northern Costa Rica. Bulletins of American Paleontology 9(39):1-309
Belongs to Anadara (Rasia) according to A. J. W. Hendy et al. 2008
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) dariensis, Anadara (Rasia) democraciana, Anadara (Rasia) emarginata, Anadara (Rasia) fissicosta, 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
Ecology: facultatively mobile epifaunal suspension feeder