Petasosella lata is found from the Late Eocene to Miocene of Victoria, Australia.
Original description: Selenaria alata var. lata Tenison-Woods, 1880
Locality: Muddy Creek, Australia
Lectotype: SAM T1452A
Reference: Bock, P.E. & Cook, P.L., 1998. Otionellidae, a new family including five genera of free-living lunulitiform Bryozoa (Cheilostomatida). Memorie di Scienze Geologiche 50: 195-211.