Subfamily Dactylomyinae Tate 1935 (spiny rat)
Mammalia - Rodentia - Echimyidae
Parent taxon: Echimyidae according to B. Patterson and R. Pascual 1968
Sister taxa: Adelphomyinae, Carterodon, Chaetomyinae, Clyomys, Dactylomys, Dicolpomys, Diplomys, Echimyinae, Eumysopinae, Eumysops, Euryzygomatomys, Gaimanomys, Haplostropha, Heteropsomyinae, Hoplomys, Isothrix, Lonchothrix, Maruchito, Mesomys, Myocastor, Pampamys, Paradelphomys, Proatherura, Quebradahondomys, Reigechimys, Theridomysops, Thrichomys, Trinomys
Subtaxa: Thrinacodus
Ecology: scansorial herbivore
Distribution: found only at Mene de Inciarte Tar Seep (Quaternary of Venezuela)