(Protoascus) (Protoascus) is a biological genus in the family Typhloplanidae and order Neoophora.
Protoascus wisconsinensis
Acrochordonoposthia
Adenocerca
Adenoplea
Amphibolella
Archopistomum
Ascophora
Bockia
Bothromesostoma
Bryoplana
Carcharodopharynx
Castrada
Cephalopharynx
Chorizogynopora
Dochmiotrema
Gullmariella
Haloplanella
Haplorhynchella
Hoplopera
Jovanella
Kambanella
Krumbachia
Limnoruanis
Lioniella
Lutheria
Macrophysaliophora
Magnetia
Marcomesostoma
Mesocastrada
Mesophaenocora
Mesostoma
Metamesostoma
Microcalyptorhynchus
Notomonoophorum
Olisthanella
Olisthanellinella
Olisthanelliola
Opistomum
Papiella
Perandropora
Phaenocora
Pratoplana
Proamphibolella
Prorhynchella
Protoascus
Protopharyngiella
Protoplanella
Pseudobockia
Pseudophaenocora
Rhomboplanilla
Rhynchomesostoma
Ruanis
Sphagnella
Strongylostoma
Stygoplanellina
Syringoplana
Taborella
Tauridella
Tetracelis
Thalassoplanina
Typhloplana
Typhloplanella
Vranjella
Yagua