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Borikenophis variegatus (SCHMIDT, 1926)

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Higher TaxaColubridae (Dipsadinae), Alsophiini, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesE: Mona Racer, Puerto Rican Racer 
SynonymDromicus variegatus SCHMIDT 1926: 160
Alsophis variegatus — GRANT 1932
Alsophis portoricensis variegatus — SCHWARTZ & HENDERSON 1991: 574
Borikenophis variegatus — HEDGES et al. 2009
Borikenophis variegatus — WALLACH et al. 2014: 109 
DistributionPuerto Rico (Isla Mona, Isla Desecheo?)

Type locality: Isla Mona  
Reproductionoviparous (not imputed, fide Zimin et al. 2022) 
TypesHolotype: FMNH 266 
DiagnosisDiagnosis: Allied to Dromicus portoricensis in scale characters, and distinguished chiefly by its coloration, in which the regular reticulation of black of the dorsal scales and the black borders of the ventrals are absent. (Schmidt 1926) 
  • Grant, C. 1932. The genus Alsophis in the Puerto Rico area,. J. Dept. Agric. Puerto Rico 16: 149-151
  • 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
  • KRYSKO, KENNETH L.; DAVID W. STEADMAN, LEROY P. NUÑEZ & DAVID S. LEE 2015. Molecular phylogeny of Caribbean dipsadid (Xenodontinae: Alsophiini) snakes, including identification of the first record from the Cay Sal Bank, The Bahamas. Zootaxa 4028 (3): 441–450 - get paper here
  • Schmidt, K. P. 1926. The amphibians and reptiles of Mona Island, West Indies. Field Mus. Nat. Hist. Ser. Zool. 12:149-163. - 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.
  • 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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