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Pseudalsophis thomasi ZAHER, YÁNEZ-MUÑOZ, RODRIGUES, GRABOSKI, MACHADO, ALTAMIRANO-BENAVIDES, BONATTO & GRAZZIOTIN, 2018

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common Names 
SynonymPseudalsophis thomasi ZAHER, YÁNEZ-MUÑOZ, RODRIGUES, GRABOSKI, MACHADO, ALTAMIRANO-BENAVIDES, BONATTO & GRAZZIOTIN 2018 
DistributionGalapagos Islands (Santiago = James, Rabida = Jervis), Ecuador

Type locality: Rabida Island (00°24’04’’S, 90°42’28’’W)  
Reproduction 
TypesHolotype: MECN (was DHMECN) 12694 (Field number 1073), an adult male, collected on 18 June 2008 (Fig. 5).
PARATYPES: MECN (was DHMECN) 12696 (Field number 1071)#, a male from Santiago Island, collected in the vicinities of Puerto Egas (001403300N 905103400W) on 17 June 2008; MZUSP 22557 (Field number 1065), a male from Santiago Island, collected in the vicinities of Puerto Egas (00 140 3200 N 90 510 1900 W) on 17 June 2008; MZUSP 22558 (Field number 1070), a female from Santiago Island, collected in the vicinities of Puerto Egas (00 140 3800 N 90 510 2500 W) on 17 June 2008; DHMECN 12695 (Field number 1074), a female from Rabida Island (00 230 5800 N 90 420 2300 W), collected on 18 June 2008; MZUSP 22556 (Field number 1072), a female from Rabida Island (00 240 0400 N 90 420 2800 W), collected on 18 June 2008. 
DiagnosisDIAGNOSIS: A large insular species of Pseudalsophis that differs from all other species of the genus by the following unique combination of characters: ventral counts in females 215–228 and males 212–224; subcaudal counts in males 97–108 and females 94–108; base of the lobular crest on the lobular crotch only slightly expanded when compared with P. occidentalis and P. dorsalis. 
CommentDiet: one paratype regurgitated an adult female Microlophus jacobi 
EtymologyNamed after Robert A. Thomas for expanding our knowledge of the systematics and taxonomy of New World snakes. See Laver & Daza 2021 for some biographical info on Richard Thomas. 
References
  • Kwet, A. 2019. Liste der im Jahr 2018 neu beschriebenen Reptilien. Elaphe 2019 (3): 52-72
  • Laver, R. J., & Daza, J. D. 2021. Blind snakes beneath the surface: Continuing the legacy of Richard Thomas. The Anatomical Record - get paper here
  • Ortiz-Catedral, Luis; Eli Christian, Michael J. A. Skirrow, Danny Rueda, Christian Sevilla, Kumar Kirtana, Enzo MR Reyes, Jennifer C. Daltry 2019. Diet of six species of Galapagos terrestrial snakes (Pseudalsophis spp.) inferred from fecal samples. Herpetology Notes 12: 701-704 - get paper here
  • Torres-Carvajal O, Pazmiño-Otamendi G, Salazar-Valenzuela D. 2019. Reptiles of Ecuador: a resource-rich portal, with a dynamic checklist and photographic guides. Amphibian & Reptile Conservation 13 (1): [General Section]: 209–229 (e178) - get paper here
  • Zaher, Hussam; Mario H. Yánez-Muñoz, Miguel T. Rodrigues, Roberta Graboski, Fabio A. Machado, Marco Altamirano-Benavides, Sandro L. Bonatto & Felipe G. Grazziotin 2018. Origin and hidden diversity within the poorly known Galápagos snake radiation (Serpentes: Dipsadidae),. Systematics and Biodiversity, DOI: 10.1080/14772000.2018.1478910 - get paper here
 
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