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Sceloporus bimaculosus PHELAN & BRATTSTROM, 1955

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Higher TaxaPhrynosomatidae, Sceloporinae, Iguania, Sauria, Squamata (lizards)
Subspecies 
Common NamesE: Twin-spotted Spiny Lizard
S: Cachora 
SynonymSceloporus magister bimaculosus PHELAN & BRATTSTROM 1955
Sceloporus magister bimaculosus — TANNER 1987
Sceloporus magister bimaculosus — CONANT & COLLINS 1991: 105
Sceloporus magister bimaculosus — LINER et al. 1993
Sceloporus magister bimaculosus — SMITH 1994: 115
Sceloporus magister bimaculosus — BELL et al. 2003
Sceloporus bimaculosus — SCHULTE et al. 2006
Sceloporus bimaculosus — LEMOS-ESPINAL & SMITH 2007
Sceloporus bimaculosus — CROTHER et al. 2012
Sceloporus bimaculosus — CROTHER et al. 2017
Sceloporus bimaculosus — HEIMES 2022
Sceloporus magister — PAVÓN-VÁZQUEZ et al. 2024 
DistributionUSA (New Mexico, Texas, Arizona), Mexico (Coahuila, Chihuahua, Durango).

Type locality: "6.6 miles east of San Antonio, Socorro, New Mexico").  
Reproductionoviparous (not imputed, fide Zimin et al. 2022) 
TypesHolotype: CAS 91199 
Diagnosis 
CommentHistorically, S. magister, including magister bimaculosus may have been confused with S. clarkii (STEJNEGER 1893).

Synonymy: Sceloporus magister bimaculosus was elevated to full species by Schulte et al. 2006 but returned to the synonymy of S. magister by Leaché and Mulcahy (2007). Recent authors have alternatively treated it as full species or synonym (e.g. Laczano et al. 2019 in whose list it does not occur in Coahuila). Pavón-Vázquez et al. 2024 do not recognize bimaculosus as valid species or even subspecies. 
EtymologyThe name S. m. bimaculosus is a Latin adjective based upon bis-, "two" or "twice," and maculosus, "spotted," and refers to a series of paired brown blotches on dorsum. 
References
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