|Named By:||Ashmead in 1898|
|Time Period:||Early Eocene|
|Location:||Canada, British Columbia. USA, Colorado - Florissant Formation|
|Classification:||| Arthropoda | Insecta | Hymenoptera | Tenthredinidae ||
Pseudosiobla campbelli is an extinct species of sawfly in the family Tenthredinidae that is known from early Eocene Ypresian stage lake deposits near the unincorporated community of Horsefly, British Columbia.