Thick lucine

Phacoides pectinata

Family Lucinidae - lucines

Bivalve (2 shells); shell round, slightly inflated; color white to light orange, interior white to yellowish, may have slight bumps on interior; irregular concentric ridges, scaly, with concentric growth lines in between; ridges are pronounced and fluted in juveniles; strong ridge from beak to posterior edge, posterior edge slightly concave above ridge; ridge from beak to upper anterior end, margin between is double concave; anterior muscle scar elongate, parallel to pallial line.
Similar Species
The concave posterior margin and double concave anterior margin distinguishes this shell.
Gulf and bay
Maximum Size
6.4 cm (2 1/2 in)
Other Common Names
Previous Scientific Names
Lucina pectinata, L. pectinatus, L. jamaicensis