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Ctenosaura pectinata (WIEGMANN, 1834)

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Higher TaxaIguanidae, Iguania, Sauria, Squamata (lizards)
Common NamesE: Guerreran Spiny-tailed Iguana, Western Spiny-tailed Iguana
S: Garrobo de Roca 
SynonymCyclura pectinata WIEGMANN 1834
Cyclura pectinata — DUMÉRIL & BIBRON 1837: 221
Ctenosaura pectinata — GRAY 1845
Ctenosaura brevirostris COPE 1886: 268
Ctenosaura teres brachylopha COPE 1886
Ctenosaura brachylopha — BAILEY 1928: 22
Ctenosaura pectinata — BAILEY 1928: 24
Ctenosaura brevirostris — BAILEY 1928: 27
Ctenosaura parkeri BAILEY 1928: 29
Ctenosaura pectinata — SMITH & TAYLOR 1950
Ctenosaura pectinata — CONANT & COLLINS 1991: 95
Ctenosaura pectinata — LINER 1994
Ctenosaura (Ctenosaura) pectinata — KÖHLER et al. 2000
Ctenosaura (Ctenosaura) pectinata — KÖHLER 2003
Ctenosaura pectinata — MATA-SILVA et al. 2015
Ctenosaura pectinata — ZARZA et al. 2019
Ctenosaura brachylopha — ZARZA et al. 2019 
DistributionUSA (introduced to Florida and southern Texas)

W Mexico (from just north of Culiacan, Sinaloa, southward to the Isthmus of Tehuantepec in SE Oaxaca, Isla de las Tres Marias, west of Nayarit, Durango, Jalisco, Colima, Michoacán, Morelos, Chiapas, Guerrero, Puebla, México, Aguascalientes)

Type locality: Restricted to Colima, Colima.

brachylopha: Mexico (Nayarit, Sinaloa, N Jalisco); Type locality: Mazatlan, Sinaloa, Mexico.  
TypesHolotype: ZMB 574, male
Syntypes: USNM 7180-7183 [brachylopha]
Holotype: USNM 18967 [parkeri]
Syntypes: USNM 24708-24709 [brevirostris] 
DiagnosisDiagnosis (brachylopha): Bailey 1928: 22

Bailey 1928 realized that C. brachylopha resembles C. pectinata but may be distinguished from it by having a median dorsal crest that does not extend over the sacral region and that it is formed by 65–75 scales. He also noticed that the first seven whorls of spinous caudal scales are separated from each other by three rows of small flat scales. In C. pectinata the first five whorls of spinous scales are separated from each other by three rows of small flat scales, but subsequent whorls of spinous scales are separated by two rows of flat scales up the middle of the length of the tail (Bailey, 1928, ). 
CommentDistribution: Erroneously reported from Guanajuato (SMITH & TAYLOR 1950: 74). The species introduced to Florida may be in fact C. similis (see TOWNSEND et al. 2003).

Synonymy: Smith & Taylor (1950) lumped C. brachylopha, C. brevirostris and C. parkeri with C. pectinata and restricted the name C. acanthura for iguanas from the Gulf of Mexico area. Zarza et al. 2019 suggested to resurrect Ctenosaura brachylopha for the northern populations of C. pectinata, although it seems that they investigated only 4 specimens (or specimens from 4 localities), one of which (from further south) appeared to be a hybrid of brachylopha and pectinata. 
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  • ZARZA, EUGENIA; Ricardo T. Pereyra; VICTOR H. REYNOSO and BRENT C. EMERSON 2009. Isolation and characterization of polymorphic microsatellite markers in the black spiny tailed iguana (Ctenosaura pectinata) and their cross-utility in other Ctenosaura. Molecular Ecology Resources 9: 117–119 - get paper here
  • ZARZA, EUGENIA; VICTOR H. REYNOSO and BRENT C. EMERSON 2008. Diversification in the northern neotropics: mitochondrial and nuclear DNA phylogeography of the iguana Ctenosaura pectinata and related species. Molecular Ecology 17: 3259–3275 - get paper here
  • Zarza, Eugenia; Víctor H. Reynoso, and Brent C. Emerson 2016. Genetic Tools for Assisting Sustainable Management and Conservation of the Spiny-Tailed Iguana,<br />Ctenosaura pectinata. Herp. Cons. Biol. 11 (Monograph 6) - get paper here
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