was named by Marshall (1976)
[Holotype- UCMP no. 37960 (Loc. V-4521, the Lone Tree Locality), partial cranium; right maxillary with alveolus for C, roots of p1, P2 complete, P3 broken, M1 complete, M2 broken, M3-4 complete; left maxillary with alveolus for C, roots of P1-2, P3 complete, M1 complete, M2 missing metacone and metastylar region, M3 complete, M4 missing stylar shelf; greater part of right mandibular ramus with alveoli for 11-4, base of C, P1 complete, posterior half of P2, alveoli for P:-M:, M2 alveoli restored, M3 missing tip of protoconid, M4 complete; greater part of left femur; proximal half of left radius; glenoid region of left scapula; greater part of atlas;
one thoracic (?) vertebra, and numerous cranial and postcranial fragments representing a single young individual.
Paratype-UCMP 39251]. It is considered to be a form taxon. Its type specimen is UCMP 37960, a partial skeleton, and it is a 3D body fossil. It is the type species of Hondadelphys