Coleopora gigantea Osburn, 1952 (original description)
Cystisella bicornis Osburn, 1952 (original description)
Emballotheca altimuralis Osburn, 1952 accepted as Calyptotheca altimuralis (Osburn, 1952) (original description)
Emballotheca latifrons Osburn, 1952 accepted as Calyptotheca latifrons (Osburn, 1952) (original description)
Emballotheca obscura Osburn, 1952 accepted as Calyptotheca obscura (Osburn, 1952) (original description)
Gemelliporella aviculifera Osburn, 1952 (original description)
Gemelliporella globulifera Osburn, 1952 (original description)
Gemelliporella inflata Osburn, 1952 (original description)
Gemelliporidra colombiensis Osburn, 1952 (original description)
Gemelliporidra lata Osburn, 1952 (original description)
Hippaliosina costifera Osburn, 1952 (original description)
Hippaliosina inarmata Osburn, 1952 (original description)
Hippomenella flava Osburn, 1952 (original description)
Hippomonavella parvicapitata (Canu & Bassler, 1930) (new combination reference)
Hippopodina californica Osburn, 1952 (original description)
Hippopodinella turrita Osburn, 1952 accepted as Abditoporella turrita (Osburn, 1952) (original description)
Hippoporella rimata Osburn, 1952 (original description)
Hippoporina ampla Osburn, 1952 (original description)
Hippothyris Osburn, 1952 (original description)
Hippothyris emplastra Osburn, 1952 (original description)
Microporella cribrosa Osburn, 1952 (original description)
Microporella pontifica Osburn, 1952 (original description)
Parasmittina Osburn, 1952 (original description)
Parasmittina alaskensis Osburn, 1952 (original description)
Parasmittina fraseri Osburn, 1952 (original description)
Parasmittina tubulata Osburn, 1952 (original description)
Phylactella alulata Osburn, 1952 (original description)
Phylactella aperta Osburn, 1952 (original description)
Porella patens Osburn, 1952 (original description)
Reteporellina bilabiata Osburn, 1952 (original description)
Rhamphostomella gigantea Osburn, 1952 (original description)
Rhamphostomella townsendi Osburn, 1952 (original description)
Rhynchozoon grandicella Canu & Bassler, 1923 (additional source)
Rhynchozoon spicatum Osburn, 1952 (original description)
Schizomavella acuta Osburn, 1952 (original description)
Schizotheca umbonata Osburn, 1952 (original description)
Smittina altirostris Osburn, 1952 (original description)
Smittina cordata Osburn, 1952 (original description)
Smittina maccullochae Osburn, 1952 (original description)
Smittina retifrons Osburn, 1952 (original description)
Smittoidea Osburn, 1952 (original description)
Smittoidea prolifica Osburn, 1952 (original description)
Stomachetosella abyssicola Osburn, 1952 (original description)
Stomachetosella distincta Osburn, 1952 (original description)
Tetraplaria veleroae Osburn, 1952 (original description)
Umbonula alvareziana (d'Orbigny, 1842) (basis of record)
Veleroa Osburn, 1952 (original description)
Veleroa veleronis Osburn, 1952 (original description)