Bivalvia - Pectinida - Pectinoidae

Full reference: A. P. Brown and H. A. Pilsbry. 1913. Fauna of the Gatun Formation, Isthmus of Panama: II. Proceedings of the Academy of Natural Sciences of Philadelphia 64:500-519

Belongs to Spondylus according to W. P. Woodring 1982

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 mimus, 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 sondeianus, Spondylus spectrum, Spondylus striatus, Spondylus tenella, Spondylus tenuispina, Spondylus victoriae, Spondylus wrightianus

Type specimen: ANSP 3863, a shell

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 65.0 x 51.0