Plaesiomys is a genus of extinct lamp shells belonging to the family Plaesiomyidae.
Fossil record
Fossils of Plaesiomys are found in marine strata of the Ordovician (age range: from 466.0 to 443.7 years ago.) of Canada, China, Europe and United States.
Species
†Plaesiomys anticostiensis (Shaler, 1865)
†Plaesiomys bellistriatus Wang, 1949
†Plaesiomys carletona Twenhofel, 1928
†Plaesiomys fidelis Popov et al., 2000
†Plaesiomys iphigenia (Billings, 1865)
†Plaesiomys multiplicata Bancroft, 1945
†Plaesiomys porcata (McCoy, 1846)
†Plaesiomys proavitus Winchell and Schuchert, 1892
