Alderina smitti Osburn, 1950 (original description)
Amastigia biseriata Osburn, 1950 (original description)
Anexechona Osburn, 1950 (original description)
Anexechona ancorata Osburn, 1950 (original description)
Aplousina major Osburn, 1950 (original description)
Beania alaskensis Osburn, 1950 (original description)
Caleschara mexicana Osburn, 1950 (original description)
Cellaria fissurifera Canu & Bassler, 1923 accepted as Cellaria diffusa Robertson, 1905 (source of synonymy)
Cellaria veleronis Osburn, 1950 (original description)
Copidozoum spinatum Osburn, 1950 (original description)
Cranosina colombiana Osburn, 1950 (original description)
Figularia hilli Osburn, 1950 (original description)
Hincksina pacifica Osburn, 1950 (original description)
Hincksina velata (Hincks, 1881) (new combination reference)
Membranipora pachytheca Osburn, 1950 (original description)
Membraniporella pulchra Osburn, 1950 (original description)
Membraniporidra porosa Osburn, 1950 (original description)
Reginella mattoidea Osburn, 1950 (original description)
Reginella nitida Osburn, 1950 (original description)
Retevirgula lata Osburn, 1950 (original description)
Sessibugula Osburn, 1950 (original description)
Sessibugula translucens Osburn, 1950 (original description)
Steginoporella cornuta Osburn, 1950 (original description)
Tegella magnipora Osburn, 1950 (original description)
Tricellaria praescuta Osburn, 1950 (original description)