Full reference: A. A. Olsson. 1931. Contributions to the Tertiary Paleontology of Northern Peru: Part 4, The Peruvian Oligocene. Bulletins of American Paleontology 17(63)
Belongs to Scapharca according to A. A. Olsson 1931
Sister taxa: Arca (Scapharca) aguadica, Arca (Scapharca) collazica, Arca (Scapharca) ecuadoriana, Arca (Scapharca) hopkinsi, Arca (Scapharca) sansebastiana, Arca (Scapharca) weeksi, Arca (Scapharca) wheeleri, Scapharca (Scapharca), Scapharca axelolssoni, Scapharca broughtoni, Scapharca cornea, Scapharca crashleyi, Scapharca crassissima, Scapharca eusphaera, Scapharca inaequivalvis, Scapharca pertenuicosta, Scapharca pinguescens, Scapharca rustica, Scapharca satowi, Scapharca sedanensis, Scapharca terhaari, Scapharca tjilanangensis, Scapharca vanwinkleae
Type specimen: Its type locality is Basal Heath or Caleto Mero Shales, which is in an Oligocene shoreface sandstone/shale in the Heath Formation of Peru
Ecology: facultatively mobile epifaunal suspension feeder