Common name	Scientific name	Family	Status	Weight	Countries
Clothed ark	Cucullaearca foliata	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca baudoni	Arcidae	Not recorded	Not recorded	Not recorded
Studded ark	Cucullaearca bullata	Arcidae	Not recorded	Not recorded	Not recorded
White bearded ark	Cucullaearca candida	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca cliffensis	Arcidae	Not recorded	Not recorded	Not recorded
Smoothed ark	Cucullaearca complanata	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca cuculloides	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca filigrana	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca grayana	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca kickapooensis	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca krishtofovichae	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca morieri	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca multivillosa	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca praerudis	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca reeveana	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca reklawensis	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca scabrosa	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca sculptata	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca supracretacea	Arcidae	Not recorded	Not recorded	Not recorded
Not recorded	Cucullaearca vincenti	Arcidae	Not recorded	Not recorded	Not recorded