Bivalvia - Pectinida - Pectinoidae

Full reference: L.B. Kellum. 1926. Paleontology and Stratigraphy of the Castle Hayne and Trent Marls in North Carolina. United States Geological Survey Professional Paper (143)1-56

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

Type specimen: Its type locality is USGS 10616 (Bourdeau tract), NE Cape Fear River, Pender Co., North Carolina, which is in an Eocene marine marl in the Castle Hayne Formation of North Carolina

Ecology: stationary epifaunal suspension feeder