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Dendrophidion clarkii DUNN, 1933

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Higher TaxaColubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Clark's Forest Racer 
SynonymDendrophidion clarkii DUNN 1933: 78
Dendrophidion dendrophis — TAYLOR 1951: 92 (part)
Dendrophidion nuchalis — SAVAGE 1973: 17 (part.)
Dendrophidion nuchale — SCOTT et al. 1983: 372 (part.)
Dendrophidion clarkii — MCCRANIE 2011
Dendrophidion clarkii — CADLE & SAVAGE 2012
Dendrophidion clarkii — WALLACH et al. 2014: 224 
DistributionCosta Rica, Panama, Colombia (incl. Valle del Cauca), Ecuador; elevation <100-1800 m.

Type locality: El Valle de Antón, Panama  
Reproductionoviparous (not imputed, fide Zimin et al. 2022) 
TypesHolotype: MCZ 34878 
DiagnosisDiagnosis: Dendrophidion clarkii is characterized by (1) Dorsocaudal reduction from 8 to 6 occurring posterior to subcaudal 25 (range, 27–65); (2) anal plate usually divided (single in 8 of 45 specimens, partially divided in 1); (3) subcaudal counts > 135 in males and females; (4) head and anterior body of adults bright green, grading to brown posteriorly; (5) blackish or dark brown nuchal collar present in adults (less distinct or absent in juveniles); (6) posterior body brownish and having dark crossbands with embedded pale ocelli; tail brown to deep reddish, and either uniform (without crossbands) or with crossbands similar in overall pattern to posterior body; (7) ventral scutes in adults marked with narrow dark brown transverse lines across the anterior edge of each scute (Fig. 4); (8) total number of enlarged spines on the hemipenis relatively few (< 60); spines in the distal row uniform in size and numbering 15 (10–15).


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CommentSynonymy partly after CADLE & SAVAGE 2012.

Distribution: Not in Honduras fide McCranie 2015 (checklist Honduras, snakes of Honduras). See maps in Figures 12, 13, 20 in Cadle & Savage 2012.

Habitat: partly arboreal (Harrington et al. 2018). 
EtymologyDendrophidion clarkii is named after Herbert C. Clark, first director of the Gorgas Memorial Laboratory in Panama and overseer of the Panamanian Snake Census, which contributed immensely to knowledge of the snake fauna of Panama (see Dunn 1949, Myers 2003). 
References
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  • CADLE, JOHN E. & JAY M. SAVAGE 2012. Systematics of the Dendrophidion nuchale complex (Serpentes: Colubridae) with the description of a new species from Central America. Zootaxa 3513: 1–50 - get paper here
  • Carrera, C. et al. 2009. Guía de Campo de los Pequeños Vertebrados del Distrito Metropolitano de Quito (DMQ). Publicación Miscelánea N° 5. Serie de Publicaciones del Museo Ecuatoriano de Ciencias Naturales (MECN) – Fondo Ambiental del MDMQ. 1-89 pp. Imprenta Nuevo Arte. Quito-Ecuador.
  • Castro-Herrera, F. & Vargas-Salinas, F. 2008. Anfibios y reptiles en el departamento del Valle del Cauca, Colombia. Biota Colombiana 9 (2): 251 - 277 - get paper here
  • Cortés Gómez, Angela María; Anyelet Valencia Aguilar, Diana Marcela Torres Domínguez, Lina María García Calderón, Diego Fernando Villaquirán Martínez, Andrea del Pilar Cáceres Franco, Fernando Castro Herrera 2010. Guía de los anfibios y reptiles. Área en conservación de la microcuenca Quebrada Pericos. [Valle de Cauca, Colombia]. Corporación Autónoma Regional del Valle del Cauca, Santiago de Cali: CVC, 37 pp. - get paper here
  • Doody, J S; Zamala, G E; Osterman, E; Coleman, L & Clulow, S 2018. Dendrophidion clarkii (Painted Forest-Racer) and Atractus dunni (Sleepy Goundsnake) Communal nesting. Herpetological Review 49 (2): 339-340 - get paper here
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  • Kornacker, P. & Natera-Mumaw, M. 2008. Feldherpetologische Daten zu einigen Amphibien- und Reptilienarten im Wolkenwald des “Parque Nacional Henri Pittier”, Rancho Grande, Venezuela. Sauria 30 (3): 21-37 - get paper here
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  • Stafford, P. J. 2002. Record of the colubrid snake Dendrophidion nuchale (Peters) from Nicaragua. Southwestern Naturalist 47(4): 615-616. - get paper here
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  • Valencia-Zuleta A, Jaramillo-Martínez AF, Echeverry-Bocanegra A, Viáfara-Vega R, Hernández-Córdoba O, Cardona-Botero VE, Gutiérrez-Zúñiga J, Castro-Herrera F. 2014. Conservation status of the herpetofauna, protected areas, and current problems in Valle del Cauca, Colombia. Amphibian & Reptile Conservation 8 (2): 1–18 (e87) - get paper here
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  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
 
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