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Dryophylax dixoni BAILEY & THOMAS, 2007

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common Names 
SynonymThamnodynastes dixoni BAILEY & THOMAS 2007
Thamnodynastes dixoni — WALLACH et al. 2014: 717
Thamnodynastes dixoni — TREVINE et al. 2021
Dryophylax dixoni — TREVINE et al. 2022 
DistributionVenezuela (Apure), SE Colombia

Type locality: Hato La Guanota, 4 km west of San Fernando, Apure State, Venezuela.  
TypesHolotype: TCWC 44896, collected 17 October 1973, by James R. Dixon and Mark A. Staton. 
DiagnosisDiagnosis: A Thamnodynastesof typical pattern with smooth or weakly keeled scales in 19-19-15 rows; cloacal plate divided; chin with distinct but not strong chin stripes (as the dark markings characteristic of T. paraguanae); ventrals in males 152-160, females 141-150; maxillary teeth 12-15+2G (about 70% have 13-14+2G). A very slender spineless hemipenis.

Character table: Franco et al. 2017, Trevine et al. 2021: 238 (Table 1) 
EtymologyNamed after James R. Dixon (1 August 1928 – 10 January 2015), American herpetologist who spent most of his academic life at Texas A&M University. 
  • Bailey, J.R.; R.A. Thomas 2007. A revision of the South American snake genus Thamnodynastes Wagler, 1830 (Serpentes, Colubridae, Tachymenini). II. Three new species from northern South America, with further descriptions of Thamnodynastes gambotensis Pérez-Santos and Moreno and Tha Memoria de la Fundación La Salle de Ciencias Naturales 166: 7-27 [2006]
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Forstner, Michael R.J.; David Lazcano, and Robert A. Thomas 2015. In Memoriam: James Ray Dixon. Southwestern Naturalist Mar 2015, Vol. 60, No. 1: 132-138. - get paper here
  • Hibbitts, T.J., Vaughn, R.K., Sites, J.W., Jr. & Fitzgerald, L.A. 2018. Obituary: James Ray Dixon (1928-2015). Herpetological Review 49 (1): 168-174. - get paper here
  • Natera-Mumaw, Marco; Luis Felipe Esqueda-González & Manuel Castelaín-Fernández 2015. Atlas Serpientes de Venezuela. Santiago de Chile, Dimacofi Negocios Avanzados S.A., 456 pp. - get paper here
  • Pedroza-Banda, Raúl; Jhon Jairo Ospina-Sarria, Teddy Angarita-Sierra, Marvin Anganoy-Criollo, John D. Lynch 2014. Estado de la fauna de anfibios y reptiles del Casanare Ciencias naturales Estado del conocimiento de la fauna de anfibios y reptiles del departamento de Casanare, Colombia. Rev. Acad. Colomb. Cienc. 38 (146): 17-34 - get paper here
  • RIVAS, GILSON A.; CÉSAR R. MOLINA, GABRIEL N. UGUETO, TITO R. BARROS, CÉSAR L. BAR- RIO-AMORÓS & PHILIPPE J. R. KOK 2012. Reptiles of Venezuela: an updated and commented checklist. Zootaxa 3211: 1–64 - get paper here
  • Rojas-Morales, J. A., Ramirez-Chaves, H. E. and Guedes, T. B. 2020. New record for Colombia, updated distribution map, and comments on the defensive behavior of Thamnodynastes dixoni Bailey & Thomas, 2007 (Serpentes, Dipsadidae, Xenodontinae). Check List 16: 169-175. - get paper here
  • Trevine, V. C., Grazziotin, F. G., Giraudo, A., Sallesbery‐Pinchera, N., Vianna, J. A., & Zaher, H. 2022. The systematics of Tachymenini (Serpentes, Dipsadidae): An updated classification based on molecular and morphological evidence. Zoologica Scripta - get paper here
  • TREVINE, VIVIAN C.; JOSÉ RANCÉS CAICEDO-PORTILLA, MARINUS HOOGMOED, ROBERT A. THOMAS, FRANCISCO L. FRANCO, GIOVANNA G. MONTINGELLI, MARIELA OSORNO-MUÑOZ, HUSSAM ZAHER 2021. A new species of Thamnodynastes Wagler, 1830 from western Amazonia, with notes on morphology for members of the Thamnodynastes pallidus group (Serpentes, Dipsadidae, Tachymenini). Zootaxa 4952 (2): 235–256 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
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