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Aspidoscelis neotesselatus (WALKER, CORDES & TAYLOR, 1997)

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Higher TaxaTeiidae, Teiinae, Gymnophthalmoidea, Sauria, Squamata (lizards)
Common NamesE: Colorado Checkered Whiptail, Triploid Checkered Whiptail 
SynonymCnemidophorus neotesselatus WALKER, CORDES & TAYLOR 1997
Cnemidophorus neotesselatus — CROTHER 2000
Aspidoscelis neotesselata — REEDER et al. 2002
Aspidoscelis neotesselatus — PYRON & BURBRINK 2013 
DistributionUSA (SE Colorado, Pueblo County; introduced to Washington, Grant county).

Type locality: juniper/grass-weed habitat with sandy soil in City of Pueblo, Pueblo Lake State Park, in Juniper Breaks
Campground, Pueblo County, Colorado.
ReproductionOviparous. A. (Cnemidophorus) neotesselatus is a triploid parthenogenetic species. Aspidoscelis neotesselata is a parthenogenetic species that originated as the result of hybridization between a diploid unisexual Common Checkered Whiptail (Aspidoscelis tesselata), and a diploid sexual species, Six-lined Racerunner (A. sexlineata viridis). The result of reproduction between a unisexual and a sexual species is an extra set of chromosomes possessed by A. neotesselata, resulting in triploidy. WALKER et al. (2012) reported tetraploid hybrids of A. neotesselata x A. sexlineata viridis. 
TypesHolotype: AMNH 141904, mature female 
DiagnosisDiagnosis:-A parthenogenetic species of Cnemidophorus with the following dorsal color pattern features: SCPV, gray, not interrupted, straight, often fused with spots; CNVL, gray and relatively straight on the neck if present or stripe on neck followed by spots in one form; SCLS, gray, relatively straight, frequently interrupted by narrow areas of black ground color, usually fused with some spots and/or bars; PSDL, linear series of spots some fused with stripes; PDST, numerous spots often fused into a reticulum; PST, unbroken irregular streak on posterior surface of either one or both thighs; and TP, black spots (scales) arranged in the appearance of extensions of the dorsolateral and vertebral fields (in two pattern classes) well past the base of the tail. Meristically distinct, in the context of the preceding features of color pattern, as follows: PABS, slightly enlarged; MS, enlarged at the edge of the gular fold; COS, usually character state I; and LSG, count < 30. (Walker et al. 1997)

Description of the holotype: Walker et al. 1997: 250 
CommentSynonymy: Specimens of Cnemidophorus neotesselatus have previously called C. tesselatus. 
EtymologyNamed after Latin neo = new and tesselatus = tiled or checkered, apparently in reference to A. tesselatus. 
  • Aubry, Lise M.; Douglas Eifler, Kaera Utsumi, and Susannah S. French 2019. Demographic Assessment of the Triploid Parthenogenetic Lizard Aspidoscelis neotesselatus at the Northern Edge of its Range. Herp. Conserv. Biology 14 (2): - get paper here
  • Bezy, Robert L. 2020. John William Wright— Recollections of Juan Siempre Correcto. Sonoran Herpetologist 33 (3): 83-92
  • Collins, J.T. and T. W. Taggart 2009. Standard Common and Current Scientific Names for North American Amphibians, Turtles, Reptiles, and Crocodilians, Sixth Edition. Center for North American Herpetology, 48 pp.
  • Cordes, James E. and James M. Walker 2006. Evolutionary and Systematic Implications of Skin Histocompatibility Among Parthenogenetic Teiid Lizards: Three Color Pattern Classes of Aspidoscelis dixoni and One of Aspidoscelis tesselata. Copeia, 2006 (1):14-26 - get paper here
  • Crother, B. I. 2000. Scientific and standard English names of amphibians and reptiles of North America north of Mexico, with comments regarding confidence in our understanding. Herpetological Circular 29: 1-82
  • Crother, B. I. (ed.) 2012. Standard Common and Current Scientific Names for North American Amphibians, Turtles, Reptiles, and Crocodilians, Seventh Edition. Herpetological Circular 39: 1-92
  • Jones, L.L. & Lovich, R.E. 2009. Lizards of the American Southwest. A photographic field guide. Rio Nuevo Publishers, Tucson, AZ, 568 pp. [review in Reptilia 86: 84] - get paper here
  • LIVO, L.J.; H. L. TAYLOR & T. L. WILCOX. 2022. Tests of Hypotheses Regarding Sources of Color-pattern Classes A and B in an Expanding Array of Aspidoscelis neotesselatus (Colorado Checkered Whiptail) in Metropolitan Denver, Colorado, USA. Herpetological Review 53(3): 385–392.
  • Pyron, R. Alexander; Frank T. Burbrink 2013. Early origin of viviparity and multiple reversions to oviparity in squamate reptiles. Ecology Letters 17 (1): 13–21 (published online 2013, in print 2014), DOI: 10.1111/ele.12168 - get paper here
  • REEDER, T.W.; CHARLES J. COLE AND HERBERT C. DESSAUER 2002. Phylogenetic Relationships of Whiptail Lizards of the Genus Cnemidophorus (Squamata: Teiidae): A Test of Monophyly, Reevaluation of Karyotypic Evolution, and Review of Hybrid Origins. American Museum Novitates 3365: 1-64 - get paper here
  • Taylor, Harry L., Lauren J. Livo, Daniel J. Martin, William R. Maynard, April Estep, Rick Clawges, Dick Roth, Joey Kellner and Tina Jackson. 2015. New northern distribution records for pattern classes A, B, and D of Aspidoscelis neotesselata (Colorado checkered whiptail) in Colorado, and biogeographic sources of northern colonists. Herpetological Review 46 (3): 312-319 - get paper here
  • Taylor, Harry L., Wilmes, Anthony J., Garey, Laura K., Montgomery, Chad E., Livo, Lauren J. and Walker, James M. 2016. Rare color-pattern misfits in indigenous arrays of parthenogenetic Aspidoscelis neotesselata (Colorado Checkered Whiptail). Herpetological Review 47 (4): 561-568 - get paper here
  • Taylor, Harry L.; James M. Walker, Charles J. Cole, and Herbert C. Dessauer 2015. Morphological Divergence and Genetic Variation in the Triploid Parthenogenetic Teiid Lizard, Aspidoscelis neotesselata. Journal of Herpetology Sep 2015, Vol. 49, No. 3: 491-501. - get paper here
  • Taylor, Harry L.; Rondeau, Renee J.; Sovell, John 2006. Alternative ontogenetic pathways to color pattern class b in a newly discovered population of parthenogenetic Aspidoscelis neotesselata (Squamata: Teiidae). Herpetological Review 37 (1): 40-44. - get paper here
  • Taylor-Young, M. 2011. The Guide to Colorado Reptiles and Amphibians. Fulcrum Publishing, Golden, Colorado, 169 pp.
  • Tucker, Derek B.; Guarino R. Colli, Lilian G. Giugliano, S. Blair Hedges, Catriona R. Hendry, Emily Moriarty Lemmon, Alan R. Lemmon, Jack W. Sites Jr., R. Alexander Pyron 2016. Methodological congruence in phylogenomic analyses with morphological support for teiid lizards (Sauria: Teiidae). Molecular Phylogenetics and Evolution 103: 75-84 - get paper here
  • Walker, J. M. 2012. Aspidoscelis neotesselata (Colorado checkered whiptail) fragmented habitat. Herpetological Review 43: 478-479 - get paper here
  • Walker, James M., James E. Cordes and Harry L. Taylor. 1997. Parthenogenetic Cnemidophorus tesselatus complex (Sauria: Teiidae): A neotype for diploid C. tesselatus (Say, 1823), redescription of the taxon, and description of a new triploid species. Herpetologica 53 (2): 233-259 - get paper here
  • WARFEL, TIMOTHY; JOSHUA WARFEL & HUNTER JOHNSON. 2021. Geographic distribution: ASPIDOSCELIS NEOTESSELATUS (Colorado Checkered Whiptail). USA: COLORADO. Herpetological Review 52 (1): 83–84. - get paper here
  • Weaver, Robert E.; Andy P. O'Connor, Joshua L. Wallace, Jeffrey M. King, and James M. Walker 2011. Discovery of the Parthenogenetic Colorado Checkered Whiptail, Aspidoscelis neotesselata (Squamata: Teiidae), In Washington State. Northwestern Naturalist 92 (3): 233-236. 2011. - get paper here
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