[MM] Arundelconodon hottoni
Eutriconodontans
DESCRIBER Cifelli, Lipka et al., 1999
TIME Cretaceous Early
Aptian
CLASS Mammalia
ORDER Eutriconodonta
FAMILY Triconodontidae
SUBFAMILY Alticonodontinae
FOSSILSITE Potomac Group, Patuxent Formation, Arundel Clay Facies, Maryland, United States
INFO
USNM 497730 Differs from Jurassic and earliest Cretacous members of the Triconodontidae family in having higher crowned lower molars with promary cusps (a-c) that are posteriorly recumbent and asymmetrical, with slightly curved labial and more angulate lingual facies, in having a cusp d that does not overhang the posterior root, and in having an extinsive interlocking system between molars, whereby mesial and distal faces have a groove and ridge, respectively, that extend from the crown along the lenght of the root. (Cifelli et. al., 1999)