N'ime ụmụ anụmanụ, Castorocauda yiri ka o nwere ihe jikọrọ ya na Krusatodon na Simpsonodon, ụmụ anụmanụ Europe. Nke a nwere ike ịbụ ihe akaebe na Europe na Eshia nwere mgbanwe nke anụmanụ na Middle Jurassic. A ga-ekewa mpaghara abụọ ahụ site na Turgai Strait. Ajụjụ: Castorocauda nwere ihe jikọrọ ya na docodants abụọ?
Krusatodon na Simpsonodon