Acteocina puruha Pilsbry & Olsson, 1941 † (original description)
Aesopus (Glyptaesopus) Pilsbry & Olsson, 1941 accepted as Glyptaesopus Pilsbry & Olsson, 1941 (original description)
Cancellaria (Tribia) bahia Pilsbry & Olsson, 1941 † (original description)
Cantharus elegans avus Pilsbry & Olsson, 1941 (original description)
Chione (Lirophora) gorgona Pilsbry & Olsson, 1941 accepted as Lirophora mariae (A. d'Orbigny, 1846) (original description)
Chione jamaniana Pilsbry & Olsson, 1941 accepted as Chionopsis amathusia (R. A. Philippi, 1844) (original description)
Chione manabia Pilsbry & Olsson, 1941 accepted as Chionopsis gnidia (Broderip & G. B. Sowerby I, 1829) (original description)
Chione traftoni Pilsbry & Olsson, 1941 accepted as Chionopsis ornatissima (Broderip, 1835) (original description)
Corbula ecuabula Pilsbry & Olsson, 1941 accepted as Caryocorbula biradiata (G. B. Sowerby I, 1833) (original description)
Crassinella clementia Pilsbry & Olsson, 1941 accepted as Crassinella nuculiformis S. S. Berry, 1940 (original description)
Crassinella haylocki Pilsbry & Olsson, 1941 accepted as Crassinella varians (P. P. Carpenter, 1857) (original description)
Crenella ecuadoriana Pilsbry & Olsson, 1941 accepted as Crenella decussata (Montagu, 1808) (original description)
Crucibulum alloplyptum Pilsbry & Olsson, 1941 † (original description)
Donax punaensis Pilsbry & Olsson, 1941 accepted as Donax gracilis Hanley, 1845 (original description)
Lucina (Lucinisca) fausta Pilsbry & Olsson, 1941 accepted as Lucinisca fenestrata (Hinds, 1845) (original description)
Macoma (Macoploma) ecuadoriana Pilsbry & Olsson, 1941 accepted as Macoploma ecuadoriana (Pilsbry & Olsson, 1941) (original description)
Mactra (Micromactra) atacama Pilsbry & Olsson, 1941 accepted as Mactrotoma angusta (Reeve, 1854) (original description)
Mitra (Tiara) gigantea polystira Pilsbry & Olsson, 1941 † accepted as Panamitra polystira (Pilsbry & Olsson, 1941) † (original description)
Mulinia camina Pilsbry & Olsson, 1941 accepted as Mulinia pallida (Broderip & G. B. Sowerby I, 1829) (original description)
Onoba fortis Pilsbry & Olsson, 1941 † (original description)
Pitar (Lamelliconcha) salanga Pilsbry & Olsson, 1941 accepted as Lamelliconcha concinna (G. B. Sowerby I, 1835) (original description)
Porphyrobaphe iostoma bilabrata Pilsbry, 1899 accepted as Porphyrobaphe iostoma (G. B. Sowerby I, 1824) (additional source)
Semele jaramija Pilsbry & Olsson, 1941 accepted as Semele verrucosa Mörch, 1860 (original description)
Strombinophos Pilsbry & Olsson, 1941 (original description)
Strombinophos loripanus Pilsbry & Olsson, 1941 † (original description)
Teinostoma ecuadorianum Pilsbry & Olsson, 1941 (original description)
Tellina (Eurytellina) ecuadoriana Pilsbry & Olsson, 1941 accepted as Eurytellina regia (Hanley, 1844) (original description)
Tellina (Eurytellina) laplata Pilsbry & Olsson, 1941 accepted as Eurytellina eburnea (Hanley, 1844) (original description)
Tellina aequizonata Pilsbry & Olsson, 1941 † (original description)
Tellina laplata Pilsbry & Olsson, 1941 accepted as Eurytellina eburnea (Hanley, 1844) (original description)
Terebra armillata sheppardi Pilsbry & Olsson, 1941 † (original description)
Terebra elena Pilsbry & Olsson, 1941 † (original description)

Ecuador for Mitra (Tiara) gigantea polystira Pilsbry & Olsson, 1941 † 
Ecuador for Onoba fortis Pilsbry & Olsson, 1941 † 
Ecuador for Teinostoma ecuadorianum Pilsbry & Olsson, 1941 

Holotype ANSP 13660, identified as Tellina aequizonata Pilsbry & Olsson, 1941
Holotype ANSP 13661, identified as Crucibulum alloplyptum Pilsbry & Olsson, 1941
Holotype ANSP 13671, identified as Strombinophos loripanus Pilsbry & Olsson, 1941
Holotype ANSP 13681, identified as Cantharus elegans avus Pilsbry & Olsson, 1941
Holotype ANSP 13688, identified as Onoba fortis Pilsbry & Olsson, 1941

 Type locality

 for Cancellaria (Tribia) bahia Pilsbry & Olsson, 1941 †

Canoa formation, Punta Blanca (Ecuador) [details]

 Type locality

 for Cantharus elegans avus Pilsbry & Olsson, 1941

Puna Island, Ecuador [details]

 Type locality

 for Crucibulum alloplyptum Pilsbry & Olsson, 1941 †

Canoa formation, Punta Blanca (Ecuador) [details]

 Type locality

 for Onoba fortis Pilsbry & Olsson, 1941 †

Canoa formation, Punta Blanca (Ecuador) [details]

 Type locality

 for Strombinophos loripanus Pilsbry & Olsson, 1941 †

Canoa formation, Punta Blanca (Ecuador) [details]

 Type locality

 for Tellina aequizonata Pilsbry & Olsson, 1941 †

Jama formation, Puerto Jama (Ecuador) [details]