†Subdichotomoceras (Sphinctoceras) Neaverson 1925 (ammonite)
Cephalopoda - Ammonitida - Perisphinctidae
Parent taxon: Subdichotomoceras according to M. S. Mesezhnikov 1984
Sister taxa: Subdichotomoceras filiplex, Subdichotomoceras inversum, Subdichotomoceras latissimum
Subtaxa: Subdichotomoceras (Sphinctoceras) subcrassum
Ecology: fast-moving nektonic carnivore
Distribution: found only at Kheta River, outcrop 12 (Gavrilino Ulovo), Khatanga Basin (Jurassic of Russian Federation)