Bivalvia - Pectinida - Pectinoidae

Alternative combinations: Chlamys (Aequipecten) uselmae, Chlamys (Plagioctenium) uselmae, Pecten uselmae, Plagioctenium uselmae

Synonyms: Chlamys (Plagioctenium) concinnata Woodring 1925, Chlamys (Plagioctenium) gonioides Woodring 1925, Chlamys (Plagioctenium) mansfieldi Woodring 1925, Pecten (Chlamys) costaricensis Olsson 1922

Belongs to Argopecten according to T. R. Waller 2011

Sister taxa: Argopecten ameleus, Argopecten anteamplicostata, Argopecten demiurgus, Argopecten eboreus yorkensis, Argopecten eccentricus, Argopecten gibbus, Argopecten gilbertharrisi, Argopecten gratus, Argopecten inaequalis, Argopecten insuetus, Argopecten irradians, Argopecten levicostatus, Argopecten nerterus, Argopecten parathetidis, Argopecten purpuratus, Argopecten thetidis, Argopecten venezualanus, Argopecten ventricosus, Argopecten woodringi, Chlamys (Argopecten) agronomica, Chlamys (Argopecten) daideleus, Chlamys (Plagioctenium) reedsi, Chlamys (Plagioctenium) diprosopa, Pecten (Plagioctenium) operculiformis, Pecten (Plagioctenium) callidus, Pecten (Plagioctenium) diminutivus, Pecten (Plagioctenium) evermanni, Pecten (Plagioctenium) cristobalensis, Pecten (Plagioctenium) hakei, Pecten (Plagioctenium) invalidus, Pecten (Plagioctenium) mendenhalli, Pecten (Plagioctenium) subdolus

Type specimens:

• Argopecten uselmae: ANSP 11124, a shell
• Chlamys (Plagioctenium) concinnata:
• Chlamys (Plagioctenium) gonioides:
• Chlamys (Plagioctenium) mansfieldi:
• Pecten (Chlamys) costaricensis:

Average measurements (in mm): shell length 27.3