Archosauria: Crurotarsi to Crocodylia
2° Nominal Author
Although the name was used by Clark (in Benton and Clark 1988) as a clade, it was first defined as a node-based taxon by Sereno et al. (2001:1519). The taxon has been used in this manner even after splitting various basal genera once regarded as “protosuchids” (Clark and Norell 2002). The active definition is a textual variant of the original definition.
Crocodylia, Crocodiliformes (Hay 1930, spelling variant)
Inactive Taxon Status
Current Age Range
Carnian (228 Ma)
Basis for Range
The earliest records are protosuchids from late Carnian or early Norian beds of the petrified Forest Member of the Chinle Formation(Clark et al. 2000). The latest records are extant crocodilians. Dates are rounded to the nearest million, the earliest from the beginning of the stage (Gradstein et al. 2004).
Definitional History #1
, and all descendants of their common ancestor.
Sereno et al. 2001:1519