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Ialtris agyrtes SCHWARTZ & ROSSMAN, 1976

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Higher TaxaColubridae (Dipsadinae), Alsophiini, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Barahona Red-headed Racer, Barreras Fanged Snake 
SynonymIaltris agyrtes SCHWARTZ & ROSSMAN 1976: 90
Ialtris agyrtes — SCHWARTZ & HENDERSON 1991: 614
Alsophis agyrtes — CROTHER 1999
Ialtris agyrtes — HEDGES et al. 2009
Ialtris agyrtes — WALLACH et al. 2014: 347 
DistributionHispaniola (SW Dominican Republic)

Type locality: Barreras, Azua Province, República Dominicana.  
Reproductionoviparous 
TypesHolotype: LSUM 28564. 
DiagnosisDESCRIPTION: Maximum SVL 576 mm; 19 scale rows at midbody; dorsal scales smooth; ventrals 160-175 in females (males unknown); subcaudals 57--63 in females; anal divided; 1 loreal; 1 preocular, usually 2 postoculars; supralabials usually 7, infralabials usually 9. Dorsum brown to tan without pattern in adults; a cream to white line from angle of jaws completely around snout, bordered above by dark brown (less well bordered below); venter patternless or with moderately heavy stippling, white anteriorly grading to pale buffy posteriorly and on underside of tail; chin and throat longitudinally streaked with brown; in juveniles, upper surface of head rich brown; dorsal ground dull tan with 40 (on each side) vertically elongate bars each about 3 scales high and 1 scale long, more or less symmetrically arranged and continuing onto upper surface of tail; lower 3 scale rows grayish and paler than rest of dorsum; white postocular line; subcaudals immaculate pale gray (Schwartz & Henderson 1991: 614). 
Comment 
References
  • Crother, Brian I. 1999. PHYLOGENETIC RELATIONSHIPS AMONG WEST INDIAN XENODONTINE SNAKES (SERPENTES; COLUBRIDAE) WITH COMMENTS ON THE PHYLOGENY OF SOME MAINLAND XENODONTINES. Contemporary Herpetology 2 - get paper here
  • Hedges, S. Blair; Arnaud Couloux; Vidal, Nicolas 2009. Molecular phylogeny, classification, and biogeography of West Indian racer snakes of the Tribe Alsophiini (Squamata, Dipsadidae, Xenodontinae). Zootaxa 2067: 1-28 - get paper here
  • Powell R; Henderson R W 1994. Ialtris Cope. Catalogue of American Amphibians and Reptiles 590: 1-2 - get paper here
  • Powell, R. and R. W. Henderson. 1994. Ialtris agyrtes. Catalogue of American Amphibians and Reptiles (591) - get paper here
  • Powell, Robert, José A. Ottenwalder, Sixto J. Incháustegui, Robert W. Henderson and Richard E. Glor. 2000. Amphibians and reptiles of the Dominican Republic: Species of special concern. Oryx 34 (2): 118-128 - get paper here
  • Schwartz, A. & Henderson, R.W. 1991. Amphibians and Reptiles of the West Indies. University of Florida Press, Gainesville, 720 pp.
  • Schwartz, A. and D. A. Rossman 1976. A review of the Hispaniolan colubrid snake genus Ialtris. Stud. Fauna Curacao Carib. IsI. 50: 76-102. - 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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