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Pseudalsophis dorsalis (STEINDACHNER, 1876)

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Higher TaxaColubridae (Dipsadinae), Alsophiini, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common Names 
SynonymDromicus chamissonis var. dorsalis STEINDACHNER 1876: 306
Dromicus chamissonis var. Habelii STEINDACHNER 1876: 306
Dromicus dorsalis — VAN DENBURGH 1912: 341
Dromicus dorsalis dorsalis — MERTENS 1960: 137
Alsophis biserialis dorsalis — THOMAS 1997: 32
Alsophis dorsalis dorsalis — SWASH & STILL 2000
Pseudalsophis dorsalis — ZAHER et al. 2009
Pseudalsophis dorsalis — WALLACH et al. 2014: 595 
DistributionEcuador: Galapagos Islands (Baltra, Bartólome, Rábida, Santiago, Santa Cruz, Santa Fé).

Type locality: “Galapagos-Inseln” [= Galapagos Islands]. Restricted to Santa Cruz Island fide R.A. Thomas (1997: 36).  
Reproduction 
TypesSyntypes: NMW 25168.1–2 
DiagnosisDiagnosis [dorsalis]: Scale-pits present; scales in 19 rows; gastrosteges 213 to 236; urosteges 95 to 119, usually some unpaired; postoculars two, rarely one; temporals usually 1+2 or 1+1; usually striped, sometimes spotted (on Barrington and Indefatigable) [from VAN DENBURGH 1912]. 
Comment 
Etymology 
References
  • Günther,A. 1860. On a new snake from the Galapagos islands. Ann. Mag. Nat. Hist. (3) 6: 78-79 - get paper here
  • Heller, Edmund 1901. Papers from the Hopkins Stanford Galapagos Expedition, 1898-1899. WIV. Reptiles. Proc. Biol. Soc. Washington 14: 39-98 - get paper here
  • Mertens, Robert 1960. Über die Schlangen der Galapagos Inseln. Senckenbergiana Biologica 41 (3/4): 133-141
  • Steindachner, F. 1876. Die Schlangen und Eidechsen der Galapagos-Inseln. Festschr. zool.-bot. Ges., Wien 1876: 303-329 - get paper here
  • Swash, A. & Still, R. 2000. Birds, Mammals and Reptiles of the Galapagos Islands. Pica Press, 168 pp.
  • Thomas, Robert A 1997. Galapagos terrestrial snakes: biogeography and systematics. Herpetological Natural History 5 (1): 19-40
  • Van Denburgh, John 1912. Expedition of the California Academy of Sciences to the Galapagos Islands, 1905-1906. IV. The snakes of the Galapagos Islands. Proc. Cal. Acad. Sci. (Ser. 4) 1: 323-374 - 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.
  • Zaher, Hussam; Grazziotin, Felipe Gobbi; Cadle, John E.; Murphy, Robert W.; Moura-Leite, Julio Cesar de; Bonatto, Sandro L 2009. Molecular phylogeny of advanced snakes (Serpentes, Caenophidia) with an emphasis on South American Xenodontines: a revised classification and descriptions of new taxa. Pap. Avulsos Zool. (São Paulo) 49 (11): 115-153 - get paper here
 
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