Bivalvia - Pectinida - Pectinoidae

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 Spondylus according to A. A. Olsson 1931

Sister taxa: Spondylus (Spondylus), Spondylus americanus, Spondylus aratus, Spondylus barbatus, Spondylus batequensis, Spondylus bifrons, Spondylus bostrychites, Spondylus buchi, Spondylus calcifer, Spondylus candidus, Spondylus carlosensis, Spondylus castus, Spondylus chipolanus, Spondylus chiriquiensis, Spondylus ciliatus, Spondylus cliffensis, Spondylus colombiensis, Spondylus concentricus, Spondylus crassicosta, Spondylus crassisquama, Spondylus decussatus, Spondylus dumosus, Spondylus fragum, Spondylus gaderopoides, Spondylus gaederopus, Spondylus gumanomocon, Spondylus lamellacea, Spondylus lucasi, Spondylus mucronatus, Spondylus olssoni, Spondylus ornatissimus, Spondylus ostreoides, Spondylus perrini, Spondylus princeps, Spondylus pseudoradula, Spondylus radula, Spondylus raoulensis, Spondylus regius, Spondylus rotundatus, Spondylus rugosus, Spondylus scotti, Spondylus sondeianus, Spondylus spectrum, Spondylus striatus, Spondylus tenella, Spondylus tenuispina, Spondylus victoriae, Spondylus wrightianus

Type specimen: Its type locality is Casa Saman, Chira Valley [Chira Fm], which is in an Eocene marine shale/ash in the Chira Formation of Peru

Ecology: stationary epifaunal suspension feeder