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Sceloporus scalaris WIEGMANN, 1828

IUCN Red List - Sceloporus scalaris - Least Concern, LC

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Higher TaxaPhrynosomatidae, Sceloporinae; Iguania, Sauria, Squamata (lizards) 
SubspeciesSceloporus scalaris scalaris WIEGMANN 1828
Sceloporus scalaris unicanthalis SMITH 1937
Sceloporus scalaris brownorum SMITH et al. 1997 
Common NamesE: Light-bellied Bunch Grass Lizard
S: Lagartija Escamosa
E: Brown’s Bunchgrass Lizard [brownorum]
S: Escamosa de Brown [brownorum]
E: Southwestern Bunchgrass Lizard [unicanthalis]
S: Escamosa de Pastizal Sureña [unicanthalis] 
SynonymSceloporus scalaris WIEGMANN 1828: 370
Tropidolepis scalaris — DUMÉRIL & BIBRON 1837: 310
Tropidolepis Scalaris — DUMÉRIL, BIBRON & DUMÉRIL 1854: 271
Sceloporus scalaris — BOULENGER 1885: 234
Sceloporus scalaris scalaris — SMITH & TAYLOR 1950: 137
Sceloporus scalaris unicanthalis — SMITH & TAYLOR 1950: 138
Sceloporus scalaris — STEBBINS 1985: 125
Sceloporus scalaris — LINER 1994
Sceloporus scalaris scalaris — BELL et al. 2003

Sceloporus scalaris brownorum SMITH et al. 1997
Sceloporus scalaris brownorum — BELL et al. 2003
Sceloporus brownorum — GRUMMER et al. 2014

Sceloporus scalaris unicanthalis SMITH 1937
Sceloporus scalaris unicanthalis — BELL et al. 2003
Sceloporus unicanthalis — GRUMMER et al. 2014 
DistributionMexico (Morelos, Durango, Aguascalientes, Jalisco, Zacatecas, Nayarit [HR 27: 153], Distrito Federal, Guanajuato, Hidalgo, Jalisco, México, Michoacán, Puebla, Zacatecas, San Luis Potosí, Tamaulipas, Quéretaro)

brownorum: C Durango, adjacent parts of Aguascalientes, Jalisco and Zacatecas, Nayarit [HR 30: 110]. Type Locality: 22 mi NE El Salto, Durango, Mexico.

scalaris: C Durango, southward over the central and southern parts of the Mexican Plateau except (apparently) Guerrero. Distrito Federal, Guanajuato, Hidalgo, Jalisco, México, Michoacán, Puebla, Zacatecas. Type locality: Mexico. Restricted to México, Distrito Federal, by SMITH & TAYLOR 1950.

unicanthalis: southern border of the Mexican plateau in C Jalisco, eastern border of Lake Chapala westward to Nayarit. Type locality: Magdalena, Jalisco. Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
 
Reproductionoviparous. 
TypesSyntypes: ZMB 654-656 (fide Taylor, 1969), collected by Ferdinand Deppe (scalaris)
Holoype: FMNH 100101, formerly EHT-HMS 7699, collected by H. M. Smith, 30 June 1935 [unicanthalis]
Holotype: CAS 48013 [slevini]
Holotype: BCB (Strecker Museum, Baylor University, Waco, Texas) 11847, taken by B. C. Brown, B.A. Brown, L D. Brown, A.A. Brown, R.B. Brown, E. Mitchell, and J. Wotring, 6 June 1961 [brownorum]. 
CommentTaxonomy: The S. scalaris species group includes five monotypic species, S. slevini, S. samcolemani, S. chaneyi, S. goldmani, and S. bicanthalis, and two polytypic species, S. scalaris (S. s. scalaris, S. s. unicanthalis, S. s. brownorum) and S. aeneus (S. a. aeneus, S. a. subniger).

Subspecies: Sceloporus scalaris slevini and S. s. samcolemani have been elevated to species status. 
EtymologyEtymology (scalaris): The Latin scalaris, "of a ladder," refers to the successive transverse dorsal dark lines resembling a ladder.

Etymology (brownorum): S. s. brownorum has been n amed for Dr. Bryce C. Brown, Director Emeritus of the Strecker Museum, Baylor University, Texas and his family, all of whom aided in collecting the largest series of this subspecies in any museum.

Etymology (unicanthalis): The Latin unus, "one," the Greek canthus, "corner," and the Latin suffix -alis, "pertaining to," refer to the distinctive single canthal scale. 
References
  • Ballinger, R. E.;Congdon, J. D. 1981. Population ecology and life history of a montane lizard (Sceloporus scalaris) in southeastern Arizona. Journal of Natural History 15: 213-222
  • Ballinger, R. E.;Congdon, J. D. 1996. Status of the bunch grass lizard, Sceloporus scalaris, in the Chiricahua Mountains of southeastern Arizona. Bull. Maryland Herp. Soc. 32: 67-69
  • Bell, E.L.; Smith, H.M. & Chiszar, D. 2003. AN ANNOTATED LIST OF THE SPECIES-GROUP NAMES APPLIED TO THE LIZARD GENUS SCELOPORUS. Acta Zoologica Mexicana (n.s.) 90: 103-174
  • Benabib, Miriam;Kjer, Karl M.;Sites, Jack W., Jr 1997. Mitochondrial DNA sequence-based phylogeny and the evolution of viviparity in the Sceloporus scalaris group (Reptilia, Squamata). Evolution 51 (4): 1262-1275 - get paper here
  • Blackburn, D.G. 1993. STANDARDIZED CRITERIA FOR THE RECOGNITION OF REPRODUCTIVE MODES IN SQUAMATE REPTILES. Herpetologica 49 (1): 118-132 - get paper here
  • Boulenger, G.A. 1885. Catalogue of the lizards in the British Museum (Natural History). Vol. 2, Second edition. London, xiii+497 pp. - get paper here
  • Bryson, Robert W.; Uri Omar García-Vázquez, Brett R. Riddle 2011. Relative roles of Neogene vicariance and Quaternary climate change on the historical diversification of bunchgrass lizards (Sceloporus scalaris group) in Mexico. Molecular Phylogenetics and Evolution 62 (1): 447-457 - get paper here
  • Carbajal-Márquez, Rubén A. and Gustavo E. Quintero-Díaz. 2013. Sceloporus scalaris (light-bellied bunchgrass lizard) clutch size. Herpetological Review 44 (4): 683
  • Carbajal-Márquez, Rubén A., Christian M. García-Balderas, Gustavo E. Quintero-Díaz, Ana G. Pérez-Delgadillo and Raramuri Reyes-Ardit. 2013. Sceloporus scalaris (light-bellied bunchgrass lizard) mating behavior. Herpetological Review 44 (4): 683-684
  • Castro Franco, R. & M. G. Bustos-Zagal 2003. Lagartijas de Morelos, México: distribución, hábitat y conservación. Acta Zoológica Mexicana (n.s.) 88:123-142
  • Castro-Franco, Rubén, María Guasalupe Bustos-Zagal 1994. List of reptiles of Morelos, Mexico, and their distribution in relation to vegetation types. Southwestern Naturalist 39 (2): 171-175 - get paper here
  • Cobarrubias, Edgar Flores; Daniel Cruz-Sáenz, and David Lazcano 2012. Notes on the Herpetofauna of Western Mexico 6: Amphibians and Reptiles of Hostotipaquillo, Jalisco, Mexico. Bull. Chicago Herp. Soc. 47 (2):21-26 - get paper here
  • Creer, Douglas A.;Kjer, Karl M.;Simmons, Daniel L.;Sites, Jack W., Jr 1997. Phylogenetic relationships of Sceloporus scalaris species group (Squamata). Journal of Herpetology 31 (3): 353-364 - get paper here
  • Degenhardt, William G.; C. W. Painter, and A. H. Price 1996. Amphibians and reptiles of New Mexico. Univ. New Mexico Press, 431 pp.
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  • Duméril, A. M.C., G. BIBRON & A. DUMÉRIL 1854. Erpétologie générale ou Histoire Naturelle complète des Reptiles. Vol. 9. Paris, XX + 440 S. - get paper here
  • Fitch, H. S. 1978. Sexual size differences in the genus Sceloporus. Univ. Kansas Sci. Bull. 51 (13): 441-461 - get paper here
  • Gravenhorst, J. L. C. 1838. Beiträge zur genaueren Kenntniss einiger Eidechsengattungen. Nova Acta Acad. Caes. Leop.-Carol. 18: 712-784 [1837]
  • GRUMMER, JARED A. & ROBERT W. BRYSON JR. 2014. A new species of bunchgrass lizard (Squamata: Phrynosomatidae) from the southern sky islands of the Sierra Madre Occidental, Mexico. Zootaxa 3790 (3): 439–450 - get paper here
  • Howland, Jeffrey M.;Whittinghill-Howland, Jan M. 1995. Sceloporus scalaris. Herpetological Review 26 (3): 155 - get paper here
  • Leaché, A.D. 2010. Species trees for spiny lizards (Genus Sceloporus): Identifying points of concordance and conflict between nuclear and mitochondrial data. Molecular Phylogenetics and Evolution 54: 162–171 - get paper here
  • Leaché, A.D. & J.W.Sites, Jr. 2009. Chromosome Evolution and Diversification in North American Spiny Lizards (Genus Sceloporus). Cytogenet Genome Res 127: 166-181 - get paper here
  • Lemos-Espinal, Julio A. and James R. Dixon 2013. Amphibians and Reptiles of San Luis Potosí. Eagle Mountain Publishing, xii + 300 pp.
  • 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
  • Leyte-Manrique, Adrian; Efrén M. Hernández Navarro y Luis A. Escobedo-Morales 2015. Herpetofauna de Guanajuato: Un análisis histórico y contemporáneo de su conocimiento Revista Mexicana de Herpetología 1(1): 1–14 - get paper here
  • Martin, Plul S. 1958. A biogeography of reptiles and amphibians in the Gomez Farias Region, Tamaulipas, Mexico. Miscellaneous publications, Museum of Zoology, University of Michigan (101): 1-102 + 7 plates - get paper here
  • Mink, Daniel G.;Sites, Jack W., Jr 1996. Species limits, phylogenetic relationships, and origins of viviparity in the scalaris complex of the lizard genus Sceloporus (Phrynosomatidae; Sauria). Herpetologica 52 (4): 551-571 - get paper here
  • Muñoz-Nolasco, Francisco Javier; Daniel Cruz-Sáenz, Oscar Jair Rodríguez-Ruvalcaba and Isaac Enrique Terrones-Ferreiro 2015. Notes on the Herpetofauna of Western Mexico 12: Herpetofauna of a Temperate Forest in Mazamitla, Southeastern Jalisco, Mexico. Bull. Chicago Herp. Soc. 50 (4):45-50
  • Ortega, Alfredo; Ricardo Rodriguez, Lucina Hernandez and Robert Barbault. 1984. Cycles Journaliers d’Activité chez deux Espèces Sympatriques de Sceloporus (Iguanidae), S. grammicus et S. scalaris Amphibia-Reptilia 5 (3-4): 347 - 354 - get paper here
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  • Smith H.M.; Bock C.E.; Bock J.H., 1990. Notes on reproduction and coloration in the bunchgrass lizard Sceloporus scalaris in southeastern Arizona USA. Bulletin of the Maryland Herp Soc: 64-67
  • Smith, H. M. 1939. The Mexican and Central American lizards of the genus Sceloporus. Field Mus. Nat. Hist., Zool. Ser. 26: 1-397. - get paper here
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  • Wiegmann,A.F.A. 1828. Beyträge zur Amphibienkunde. Isis von Oken 21 (4): 364-383 - get paper here
 
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