Onychodectes tisonensis (Cope 1888, earliest Paleocene, 64mya) was considered a taeniodont, but here nests basal to Carpolestes and the Rodentia + Multituberculata, all derived from the tree shrews, and Ptilocercus, as well as Microysops.
Conoryctella dragonensis (Gazin 1939; Paleocene; holotype USNM 15704) is a traditional taeniodont, but here nests with Onychodectes, sharing most of its traits. Traditionally this genus is identified by its teeth, which tend to converge in Mammalia, rather than in a cladogram which tests all available traits. Note the flat to cup-shaped molars and the long premaxilla.
Cope ED 1876. On the Taeniodonta, a new group of Eocene Mammalia. Proceedings of the Academy of Natural Science. Philadelphia 28:39.
Cope ED 1888. The vertebrate fauna of the Puerco epoch. Am. Nat. 22:161-63.
Cope ED 1888. Synopsis of the vertebrate fauna of the Puerco series. Trans. Am. Philos. Soc. n.s., 16:298-361.
Gazin CL 1939. A further contribution to the Dragon Paleocene fauna of central Utah. Journal of Washington Academy of Sciences 29(7):273-286.
Schoch RM and Lucas SG 1981. A new species of Conoryctella (Mammalia: Taeniodonta) from the Paleocene of the San Juan Basin, New Mexico, and a revision of the genus. Postilla 185: 23pp.
