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Higher TaxaTeiidae, Tupinambinae, Gymnophthalmoidea, Sauria, Squamata (lizards) 
Common NamesS: Mato de agua, mato pollero, mato real
E: Cryptic golden tegu 
DistributionVenezuela (west to Falcon), French Guiana, Guyana, Suriname, Brazil (south to the confluence of the Rio Negro and Rio Branco), Colombia (into the Andes in the vicinity of Bucaramango)

Type locality: Dubulay Ranch on the Berbice River, elevation 200 ft asl, 5.681944–57.533333, Guyana.  
TypesHolotype: AMNH 140937, male. Size SVL 323 mm, tail broken. Collected 5 March 1994 by Charles J. Cole and Carol R. Townsend. 
CommentSize. The largest Tupinambis cryptus sp. n. measured was a male 391 mm SVL with a 53 mm tail. The smallest was a neonate that was 85 mm SVL and a 42 mm tail. Fourteen males SVL 216–391 mm, x = 281.71 mm, SD = 41.11; seven had undamaged tails 463–635, X = 448.56 mm, SD = 6.62. Eleven female SVLs 183–284 mm, X = 231. mm, SD = 39.73; only three had unbroken tails 384–65, X = 481. mm, SD = 79.87. Smallest individual mea- sured 85 mm SVL.

Comparisons. Tupinambis cryptus sp. n. can be distinguished from the sometimes sympatric and syntopic T. teguixin by its lower number of vertebral rows (average 16 vs 116); three supratemporals (T. teguixin usually has two); one occipital contacting the interparietal (T. teguixin usually has three); three ciliaries contacting the last supraocular (T. teguixin has two); the dorsal surface of the hind legs is uniform in older adults with younger animals having irreg- ular vermiculations (T. teguixin has light colored round spots—but may also show reticula- tions); This species can be distinguished from T. cuzcoensis sp. n., by its lower vertebral scale row count (means 14 vs 119 in T. cuzcoensis); its longest supraocular is the first (in T. cuzcoen- sis sp. n. the second is longest); the species has a higher average number of scale rows around mid-body (16) compared to 98 in T. cuzcoensis; and the first pair of chin shields are longer than the postmental (T. cuzcoensis sp n has the first pair of chin shields shorter or about equal to the postmental in length). It can be distinguished from T. zuliensis sp. n. by having the first supraocular longer than the second.

Distribution: see map in Murphy et al. 216: 12 (Fig. 7). 
  • Kwet, Axel 2017. Neue Arten: Liste der im Jahr 2016 neu beschriebenen Reptilien Terraria-Elaphe 2017 (3): 54-70 - get paper here
  • Murphy JC, Jowers MJ, Lehtinen RM, Charles SP, Colli GR, Peres AK Jr, Peres Jr AK, Hendry CR, Pyron RA 2016. Cryptic, Sympatric Diversity in Teg Lizards of the Tupinambis teguixin Group (Squamata, Sauria, Teiidae) and the Description of Three New Species. PLoS One 11 (8): e0158542.doi:10.1371/journal.pone.0158542 - get paper here
  • RIBEIRO-JÚNIOR, MARCO A., SILVANA AMARAL 2016. Catalogue of distribution of lizards (Reptilia: Squamata) from the Brazilian Amazonia. III. Anguidae, Scincidae, Teiidae Zootaxa 4205 (5): 401–430
  • Señaris, J. Celsa; María Matilde Aristeguieta Padrón, Haidy Rojas Gil y Fernando J. M. Rojas-Runjaic 2018. Guía ilustrada de los anfibios y reptiles del valle de Caracas, Venezuela. Ediciones IVIC, Instituto Venezolano de Investigaciones Científicas (IVIC). Caracas, Venezuela. 348 pp.
  • Silva, Marcélia B.; Marco A. Ribeiro-Júnior, and Teresa C. S. Ávila-Pires 2018. A New Species of Tupinambis Daudin, 1802 (Squamata: Teiidae) from Central South America. Journal of Herpetology 52 (1): 94-110 - get paper here
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