Archosauria: Crurotarsi to Crocodylia
2° Nominal Author
Sereno (1991:11) provided a node-based definition for Suchia. Parrish (1993:296) remarked that Suchia is “Crocodylotarsi less Parasuchia”, but did not provide a definition. The active definition is a first-order revision of the only existing definition (Sereno 1991) that includes specifiers for
and the clades most likely to be basal. In this manner, Suchia captures the concept first articulated by Krebs (1974) and put on a cladogram by Benton and Clark (1988). Ornithosuchidae is not included or excluded by definition. Should ornithosuchid relationships lie within Suchia as defined, they naturally would be regarded as suchians.
Inactive Taxon Status
Current Age Range
Anisian (245 Ma)
Basis for Range
The earliest record is
from Anisian-age beds in Germany (Krebs 1965). The latest record includes extant crocodylians. Dates are rounded to the nearest million, the earliest from the beginning of the stage and the latest from the end of the stage (Gradstein et al. 2004).
Definitional History #1
, Aetosauria, Rauisuchia, Poposauridae, Crocodylomorpha, and all descendants of their common ancestor.
, Aetosauria, Rauisuchia, Poposauridae, Crocodylomorpha