Dryptosaurus aquilunguis (Cope, 1866)

Holtz, TR jr., 2004, Tyrannosauroidea, The Dinosauria, University of California Press, pp. 111-136 : 8

Dryptosaurus aquilunguis

is known from fragments of the skull, caudal vertebrae, a humerus, a partial manus, incomplete pubes and ischia, and much of the hindlimb ( fig. 5.24; Cope 1866); it was recently redescribed by Carpenter et al. (1997). Denton (1990) suggested that this dinosaur was a coelurosaur; a subsequent phylogenetic analysis by Holtz (1998a) supported this suggestion. However, Currie (2000) and Carr et al. (in press) considered this taxon to be a tyrannosauroid; the latter authors note the presence of a greatly enlarged caudal surangular foramen, a semicircular scar on the dorsal margin of the ischium, bipartite longitudinal ridges on the cranial edge of the fibula, and other synapomorphies shared with Tyrannosauridae .