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Clade
Subclade

Taxon
Taxon
Protosuchia
Nominal Author
Mook 1934
2nd Nominal Author
Taxon Status ACTIVE
Comments
Coined by Mook (1934), this taxon has been used variously: (1) to unite Spehnosuchidae and Protosuchidae as a basal grade of crocodylomorphs (Steel 1973) (2) as a redundant higher taxon for Protosuchidae (= Notochampsidae; Romer 1956, Busbey and Gow 1984) (3) abandoned altogether in favor of Protosuchidae (Clark 1994). There is clearly a fairly diverse clade of small-bodied crocodilians most closely related to Protosuchus richardsoni in nearly all cladistic analyses. The active definition seeks to identify that calde and is a textual variant of that proposed by Sereno et al. (2001).
Potential Synonomy

Active Phylogenetic Definition
Active Definition
The most inclusive clade containing Protosuchus richardsoni (Brown 1933) but not Crocodylus niloticus (Laurenti 1768).
Shorthand
> Protosuchus richardsoni but not Crocodylus niloticus.
Definitional Author
Sereno et al. 2001
Definition Status TEXTUAL SUBSTITUTION
Definition Type STEM
Node-Stem Triplet STEM
Other Triplet Taxa
Crocodyliformes, Mesoeucrocodylia
Specifiers
Specifier(s) A
Protosuchus richardsoni
Specifier(s) B
Specifier(s) C
Crocodylus niloticus
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
2001

Inactive Taxon Status
Rejection Criteria
Critique
 

Definitional History #1
Earliest Record
All crocodyliforms more closely related to Protosuchus richardsoni than to Crocodylus niloticus.
Latest Record
Sereno et al. 2001:1519
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Protosuchus richardsoni, Crocodylus niloticus
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