Reiszerpeton

Reiszerpeton is an extinct genus of dissorophid temnospondyl known from the Early Permian Archer City Formation of Texas. It is known solely from the holotype, MCZ 1911, a complete skull. This specimen was originally referred to the amphibamiform Tersomius texensis.[1] A reappraisal of the holotype of T. texensis and a number of other referred specimens by Maddin et al. (2013)[2] noted a number of differences from both T. texensis and amphibamiforms more broadly that suggested affinities with the Dissorophidae. This was confirmed by a phylogenetic analysis, which placed it as the sister taxon to the Eucacopinae (Cacops + Zygosaurus + Kamacops). Reiszerpeton is known only from the type species, R. renascentis, which was named for Canadian paleontologist Robert Reisz. The species name refers to the recognition of Reisz as a "renaissance paleontologist." It is differentiated from other dissorophids by its small size, small and more numerous maxillary teeth, smooth cranial ornamentation, and greater distance between the orbit and the otic notch.

Reiszerpeton
Temporal range: Early Permian
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: †Temnospondyli
Family: †Dissorophidae
Genus: †Reiszerpeton
Maddin et al., 2013
Type species
†Reiszerpeton renascentis
Maddin et al., 2013

Phylogeny

Below is the 50% majority rule consensus tree from Maddin et al. (2013):

 
 
 

Micromelerpeton

 
 
 
 
 

Platyrhinops

 
 

Doleserpeton

 
 
 
Trematopidae
 

Fedexia

 
 
 

Ecolsonia

 
 
 

Tambachia

 
 

Anconastes

 
 
 

Phonerpeton

 
 

Acheloma

 
 
 
 
 
Dissorophidae
 

Platyhystrix

 
 
 

Aspidosaurus

 
 
 
 

Conjunctio

 
 
 

Dissorophus

 
 
 

Broiliellus olsoni

 
 
 

Broiliellus texensis

 
 
 

Broiliellus brevis

 
 

Broiliellus reiszi

 
 
 
 
 
 
 
 

Brevidorsum

 
 
 

Rio Arriba taxon

 
 
 

Admiral taxon

 
 
 

Reiszerpeton renascentis

 
 
 

Cacops aspidephorus

 
 

Cacops morrisi

 
 
 

Kamacops

 
 

Zygosaurus

 
 
 
 
 
 
 
 
 
 
 
 
 

References

  1. Carroll, Robert L. (1964). "Early evolution of the dissorophid amphibians". Bulletin of the Museum of Comparative Zoology. 131 (7): 161–250 – via Biodiversity Heritage Library.
  2. Maddin, H. C.; Fröbisch, N. B.; Evans, D. C.; Milner, A. R. (2013). "Reappraisal of the Early Permian amphibamid Tersomius texensis and some referred material". Comptes Rendus Palevol. 12 (7–8): 447–461. doi:10.1016/j.crpv.2013.06.007.


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