Teyumbaita

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Teyumbaita
Temporal range: Norian
~221.5–205.6 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: †Rhynchosauria
Family: †Hyperodapedontidae
Subfamily: †Hyperodapedontinae
Genus: †Teyumbaita
Montefeltro, Langer and Schultz, 2010
Species
  • †T. sulcognathus (Azevedo & Schultz, 1987) Montefeltro et al., 2010 (type)
Synonyms
  • Scaphonyx sulcognathus Azevedo & Schultz, 1987

Teyumbaita (meaning "lizard (teyú) and parrot (mbaitá)" in the Brazilian aborigine Tupi-Guaraní language) is an extinct genus of hyperodapedontine rhynchosaur from the Upper Triassic (early Norian age) epoch of Paleorrota, Rio Grande do Sul, southern Brazil. Its fossils, two nearly complete skulls and a partial skull were discovered in the lower part of the Caturrita Formation and was first assigned to a species of Scaphonyx (now considered to be a nomen dubium), Scaphonyx sulcognathus. This species was reassigned to its own genus by Felipe Chinaglia Montefeltro, Max Cardoso Langer and Cesar Leandro Schultz in 2010 and the type species is Teyumbaita sulcognathus.[1] Fossil material of a second, yet-unnamed species, is known from the Hoyada del Cerro Las Lajas site of the Ischigualasto Formation (Argentina).[2]

Phylogeny[]

Cladogram based on Montefeltro, Langer and Schultz (2010):[1]

Rhynchosauria
 

Mesosuchus

 
 
 

Howesia

 
Rhynchosauridae
 

Rhynchosaurus

 
 
 
 

Rhincossauro de Mariante

 
 

Stenaulorhynchus

 
 
 
 

Fodonyx

 
Hyperodapedontinae
 

Isalorhynchus

 
 
 

Hyperodapedon

 
 

Teyumbaita

 
 
 
 
 
 
 
 

Material[]

Many specimens of T. sulcognathus have been found to date:[1]

  • UFRGS-PV-0232T (holotype) – partial skeleton with nearly complete skull
  • UFRGS-PV-0298T – partial skeleton and nearly complete skull
  • UFRGS-PV-0290T – partial skeleton and skull
  • UFRGS-PV-0418T – partial right mandible
  • UFRGS-PV-0420T – partial right dentary and postcrania
  • UFRGS-PV-0445T – partial maxilla
  • MCP-683 – partial left dentary

References[]

  1. ^ a b c Felipe Chinaglia Montefeltro; Max Cardoso Langer & Cesar Leandro Schultz (2010). "Cranial anatomy of a new genus of hyperodapedontine rhynchosaur (Diapsida, Archosauromorpha) from the Upper Triassic of southern Brazil". Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 101: 27–52. doi:10.1017/S1755691010009060. S2CID 129472459.
  2. ^ Julia B. Desojo; Lucas E. Fiorelli; Martín D. Ezcurra; Agustín G. Martinelli; Jahandar Ramezani; Átila. A. S. Da Rosa; M. Belén von Baczko; M. Jimena Trotteyn; Felipe C. Montefeltro; Miguel Ezpeleta & Max C. Langer (2020). "The Late Triassic Ischigualasto Formation at Cerro Las Lajas (La Rioja, Argentina): fossil tetrapods, high-resolution chronostratigraphy, and faunal correlations". Scientific Reports. 10 (1): 12782. Bibcode:2020NatSR..1012782D. doi:10.1038/s41598-020-67854-1. PMC 7391656. PMID 32728077.


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