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Lampropeltis ruthveni BLANCHARD, 1920

IUCN Red List - Lampropeltis ruthveni - Near Threatened, NT

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Higher TaxaColubridae, Colubrinae, Lampropeltini, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common NamesE: Ruthvens Kingsnake
G: Ruthvens Königsnatter 
SynonymLampropeltis ruthveni BLANCHARD 1920
Lampropeltis triangulum ruthveni
Lampropeltis ruthveni — LINER 1994
Lampropeltis ruthveni — MATTISON 2007: 30
Lampropeltis ruthveni — WALLACH et al. 2014: 359
Lampropeltis ruthveni — HANSEN & SALMON 2017: 739 
DistributionMexico (Michoacan, Querétaro, Jalisco, Hidalgo, Guanajuato)

Type locality: Poirenaro (= Patzcuaro), Michoacan, Mexico  
Reproductionoviparous 
TypesHolotype: USNM 46558 (said to be L. t. arcifera by Williams 1978: 187) 
DiagnosisDiagnosis: A moderate-sized (maximum TL = 1,295 mm) species of kingsnake most similar to nearby populations of L. polyzona (formerly L. triangulum arcifera; see Ruane et al., 2014) (Fig. 28). A tricolor pattern, a black head, and often lighter markings on the snout, are present in both species; however, in L. ruthveni the head is broader and distinct from the neck, whereas in L. polyzona the head is only slightly distinct from the neck (Fig. 29). The body of L. ruthveni is relatively more robust compared to the more slender habitus of L. polyzona, and it also differs by a lower number of ventral scales (182–195 vs. 204–222 in nearby L. polyzona). Although these two species have not been found in sympatry, apparently reflecting different habitat and elevation preferences, the range of L. ruthveni largely is circumscribed by that of L. polyzona. [ HANSEN & SALMON 2017: 739] 
CommentHybridization: L. alterna hybridizes with L. ruthveni in captivity (Hornig 2014). However, their ranges do not even closely approach one another in nature.

Distribution: see map in HANSEN & SALMON 2017: 722 (Fig. 17). 
EtymologyNamed after Alexander Grant Ruthven (1882-1971), American herpetologist. 
References
  • Augstenová, Barbora; Sofia MazzoleniOrcid, Lukáš Kratochvíl Orcid and Michail Rovatsos 2017. Evolutionary Dynamics of the W Chromosome in Caenophidian Snakes Genes 2018, 9(1), 5; doi:10.3390/genes9010005 - get paper here
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Blanchard, Frank N. 1920. Three new snakes of the genus Lampropeltis. Occasional Papers of the Museum of Zoology, University of Michigan (81): 1-10 - get paper here
  • Blanchard, Frank N. 1920. A synopsis of the king snakes: Genus Lampropeltis Fitzinger. Occasional Papers of the Museum of Zoology, University of Michigan (87): 1-7 - get paper here
  • Bryson Jr., Robert W.; Jennifer Pastorini, Frank T. Burbrink and Michael R.J. Forstner 2007. A phylogeny of the Lampropeltis mexicana complex (Serpentes: Colubridae) based on mitochondrial DNA sequences suggests evidence for species-level polyphyly within Lampropeltis. Molecular Phylogenetics and Evolution 43 (2): 674-684 - get paper here
  • Dixon, James R. and Julio A. Lemos-Espinal 2010. Amphibians and reptiles of the state of Queretaro, Mexico. Tlalnepantla UNAM, 428 pp.
  • Garstka,W.R. 1982. Systematics of the mexicana species group of the colubrid genus Lampropeltis, with an hypothesis [of] mimicry. Breviora (466): 1-35 - get paper here
  • Grünwald, Christoph Imre, Nadia Pérez-Rivera, Iván Trinidad Ahumada-Carrillo, Héctor Franz-Chávez and Brandon Thomas La Forest. 2016. New distributional records for the herpetofauna of Mexico. Herpetological Review 47 (1): 85-90
  • Hansen, R. W., and G. T. Salmon. 2017. Distribution analysis, taxonomic updates, and conservation status for the Lampropeltis mexicana group (Serpentes: Colubridae). Mesoamerican Herpetology 4(4): 700–758 - get paper here
  • Hansen, Robert W., Raúl Hernández Arciga and Ronald F. Savage. 2015. Geographic Distribution: Lampropeltis ruthveni (Ruthven's kingsnake). Herpetological Review 46 (4): 574
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • Hilken,G. & Schlepper,R. 1998. Der Lampropeltis mexicana-Komplex (Serpentes: Colubridae): Naturgeschichte und Terrarienhaltung. Salamandra 34 (2): 97-124 - get paper here
  • Hornig, Malte 2014. Echte Raritäten: Farbvarianten der Graugebänderten Königsnatter. Draco 16 (57): 74-79 - get paper here
  • Lemos-Espinal, Julio A., Geoffrey R. Smith 2015. Amphibians and reptiles of the state of Hidalgo, Mexico. Check List 11 (3): 1642 - get paper here
  • Lohrberg, B. 1991. Lampropeltis ruthveni (Blanchard, 1921) - Erfahrungen bei Haltung und Zucht. Sauria 13 (4): 27-30 - get paper here
  • Mattison, Chris 2007. The New Encyclopedia of Snakes. Princeton University Press
  • Roth-Monzón AJ, Mendoza-Hernández AA, Flores-Villela O. 2018. Amphibian and reptile biodiversity in the semi-arid region of the municipality of Nopala de Villagrán, Hidalgo, Mexico. PeerJ 6:e4202 - get paper here
  • Roth-Monzón, Andrea J.; Andrés Alberto Mendoza-Hernández, and Oscar A. Flores-Villela 2011. Lampropeltis ruthveni (Serpentes: Colubridae) from the State of Hidalgo, Mexico. Southwestern Naturalist 56 (3): 430-431. - get paper here
  • Thissen, R. & Hansen, H. 2001. Königsnattern - Lampropeltis. Natur und Tier Verlag (Münster), 172 pp. - 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.
  • Williams, K. L. 1978. Systematics and natural history of the American milk snake Lampropeltis triangulum. Milwaukee Publ. Mus. Publ. Biol. Geol. No. 2, 258 pp. - get paper here
  • Williams, K. L. 1988. Systematics and natural history of the American milk snake Lampropeltis triangulum. 2nd ed. Milwaukee Publ. Mus. Publ. Biol. Geol. - get paper here
 
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