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Thamnodynastes pallidus (LINNAEUS, 1758)

IUCN Red List - Thamnodynastes pallidus - Least Concern, LC

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common NamesAmazon Coastal House Snake (pallidus), Northern Coastal House Snake (strigilis) 
SynonymColuber pallidus LINNAEUS 1758: 221
Coluber strigilis THUNBERG 1787 (fide CEI 1993)
Natrix punctatissima WAGLER 1824: 39
Coluber nattereri MIKAN 1828 (fide WALLACH et al. 2014: 718)
Thamnodynastes punctatissimus — WAGLER 1830: 182
Dipsas punctatissima — SCHLEGEL 1837: 292
Sibon punctatissimus — BERTHOLD 1840: 900
Dipsas punctatissima — DUMÉRIL & BIBRON 1854: 1151
Thamnodynastes pallidus — ANDERSSON 1899: 17
Dryophylax pallidus — AMARAL 1930: 103
Thamnodynastes pallidus — PETERS & OREJAS-MIRANDA 1970: 300
Thamnodynastes pallidus — MYERS & DONNELLY 1996: 46
Dryophylax pallidus — JAUCH 1979
Dryophylax pallidus strigilis — JAUCH 1979
Thamnodynastes strigilis — MYERS & DONNELLY 1996: 46
Thamnodynastes strigilis — STARACE 1998: 338
Thamnodynastes strigilis — GORZULA & SEÑARIS 1999
Thamnodynastes pallidus — GORZULA & SEÑARIS 1999
Thamnodynastes cf. pallidus — RIVAS & BARRIO 2005
Thamnodynastes strigilis — RODRIGUES 2003
Thamnodynastes strigilis — BLANCO-TORRES et al. 2013
Thamnodynastes pallidus — WALLACH et al. 2014: 718 
DistributionGuyana, Surinam, French Guiana, Brazil (Amapá, Bahia etc), Peru, Venezuela (Cojedes), Colombia, Bolivia, Ecuador

strigilis: Colombia, Venezuela, Guyana, Surinam, French Guiana, Brazil (Rio Grande do Sul), Argentina; Type locality: unknown (fide KORNACKER 1999).

Type locality: “Indiis” [in error] Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
 
ReproductionViviparous. 
TypesHolotype: NRM = Royal Museum Stockholm (mislabelled as Coluber mycterizans fide BAILEY et al. 2005); neotype: ZMUU 292 (previously the lectotype of T. strigilis), designated by Bailey et al. 2005
Lectotype: ZSM 2043/0, male [Natrix punctatissima] 
CommentNot listed by GASC & RODRIGUES 1980.

Synonymy partly after CEI 1993 and BAILEY et al (2005). AMARAL 1926 and BAILEY (2005) synonymized Thamnodynastes strigilis with T. pallidus.

Diagnosis: Thamnodynastes pallidus has smooth dorsal scales, usually 17-17-13 or -11 (rarely 19 at midbody); cloacal scale usually single; maxillary teeth 16-20+2G; eye very large; ventrals, males 149-163, females 136-149; subcaudals, males 85-100, females 78-97; hemipenis about 6-8 SC long, moderately stout,finely spinous, unforked and with sulcus simple; posterior ventral pattern of three sets of quadruple lines (or approximated pairs).

The following characters may be used to separate T. pallidus from sympatric congeners that have been described (characters are given for the sympatric species, followed parenthetically by characters of T. pallidus): T lanei has keeled (vs. smooth) dorsal scales, dorsal scales 17-17-15 (vs. 17-17-13 or less), and a divided (vs. single) cloacal scale; T. chaquensis with slightly keeled scales (vs. smooth), dorsal scales 19-19-15 (vs. 17-17- 13 or less), divided (vs. single) cloacal scale, and venter heavily suffused with dark pigment (vs. pale); T. attenuata has dorsal scale rows 19-19-15 (vs. 17-17-13 or less) and a divided (vs. single) cloacal scale.

Distribution: Not in Paraguay (fide Paul Smith, pers. comm., 27 Apr 2014). Not in Uruguay fide CARREIRA et al. (2005); note that KORNACKER (1999) listed strigilis for Uruguay too.

Type species: Coluber pallidus LINNAEUS 1758: 221 is the type species of the genus Thamnodynastes WAGLER 1830. 
EtymologyNamed after Latin “pallidus” = pale or yellow(ish). 
References
  • Amaral,A. do 1926. Notas de ophiologia. I. Sobre a invalidez de um genero e algumas especies de ophidios Sul-Americanos. Rev. Mus. Paulista 14: 17-33
  • Andersson, L.G. 1899. Catalogue of Linnean type-specimens of snakes in the Royal Museum in Stockholm. Bihang till Konglika Svenska Vetenskaps-Akademiens. Handlingar, Stockholm. 24: 1-34
  • Bailey, J.R.; R.A. Thomas, R.A.; Jorge da Silva Jr., N. 2005. A revision of the South American snake genus Thamnodynastes Wagler, 1830 (Serpentes, Colubridae, Tachymenini). I. Two new species of Thamnodynastes from Central Brazil and adjacent areas, with a redefinition of and neotype designation for Thamnodynas Phyllomedusa 4 (2): 83-102 - get paper here
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  • Gorzula, Stefan & Senaris, J. Celsa 1999. In: Contribution to the herpetofauna of the Venezuelan Guayana. I: a data base. Scientia Guaianae, Caracas, No. 8 [1998], 269+ pp.; ISBN 980-6020-48-0
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  • Marques, Ricardo, Érica Fonesca and Moacir Santos Tinôco. 2014. Thamnodynastes pallidus (Amazon coastal house snake) reproduction. Herpetological Review 45 (4): 714
  • Marques, Ricardo; Moacir S. Tinôco, Dennis Rödder, Henrique C. Browne-Ribeiro. 2013. Distribution extension of Thamnodynastes pallidus and new records within the distribution of Erythrolamprus reginae, Imantodes cenchoa and Siphlophis compressus (Serpentes, Dipsadidae) for the north coast of Bahia, Brazil. Herpetology Notes 6: 529-532. - get paper here
  • Myers, C. W. & M. A. DONNELLY 1996. A New Herpetofauna from Cerro Yaví, Venezuela: First results of the Robert G. Goelet American-Terramar Expedition to the Northwestern Tepuis. American Museum Novitates 3172: 1-56. - get paper here
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