Megadolodus McKenna, 1956

Carrillo, Juan D., Suarez, Catalina, Benites-Palomino, Aldo Marcelo, Vanegas, Andrés, Link, Andrés, Rincón, Aldo F., Luque, Javier, Cooke, Siobhán B., Tallman, Melissa & Billet, Guillaume, 2023, New remains of Neotropical bunodont litopterns and the systematics of Megadolodinae (Mammalia: Litopterna), Geodiversitas 45 (15), pp. 409-447 : 416

Genus Megadolodus McKenna, 1956

EMENDED DIAGNOSIS. — The dental formula is I?/2 C?/1 P 4 / 4 M 3/3. Large, brachydont and bunodont megadolodine litoptern. Robust mandible. It differs from non-megadolodine proterotheriids in having the following combination of characters: The distal-most lower incisor is tusk-like, and the lower canine is small. Paraconid absent on p3-m3. The p3-4 are molariform and lack a hypoconulid. P3-4 without hypocone and with paraconule and metaconule. Upper molars with hypocone. M2 larger than the M1 and M3. Limbs more robust and with shorter distal elements in comparison with other proterotheriids for which the skeleton is known ( Cifelli & Villarroel 1997). Megadolodus differs from Neodolodus in its larger size, the position of the posterior-most point of symphysis at the level of p3, and the hypoconid of the p4 located directly distal to the protoconid. It differs from Bounodus in having a proportionally larger P4 and M1, the latter and having an a quadrangular outline (not elongated mesiodistally) ( Carlini et al. 2006).