|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Pecten (Lyropecten) pretiosus
Bivalvia - Pectinida - Pectinidae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|L. G. Hertlein 1925||Shell small. Right valve moderately arched, and orna- mented by about 17 or 18 rounded, radiating ribs, separated by somewhat narrower interspaces; ribs and interspaces sculptured by fine, radiating fines and crossed by fine, concentric lines of growth ; anterior and posterior margins turning down abruptly, and smooth except for incremental striae; ventral margin rounded and turned down abruptly ; anterior ear with a distinct byssal notch, and a slight groove also present between ear and margin of shell ; about five radiating riblets crossed by incremental lines ornament the ear; posterior ear sculptured by about six or seven radiating riblets, crossed by incremental striae, the ear sloping downward and slightly posteriorly from the hinge line. Left valve ornamented by about 14 or 15 radiating ribs, the whole surface with sculpture similar to that of right valve ; ears sculptured much as on right valve. Altitude 27 mm. ; longitude 29 mm. ; diameter of right valve approximately 10 mm. ; apical angle of right valve approximately 87°.|