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Higher TaxaTropiduridae, Iguania, Sauria, Squamata (lizards)
Common NamesPortuguese: Dragãozinho, Iguaninha-Azul, Lagarto-das-Pedras 
Stenocercus caducus – SILVA et al., 2010
Stenocercus sinesaccus – NOGUEIRA & RODRIGUES 2006 – part
Stenocercus sinesaccus – TORRES-CARVAJAL 2007 – part
Stenocercus sp. – SILVA, 2007 – part 
DistributionBrazil (Mato Grosso)

Type locality: Brazil: Mato Grosso: municipality of Vale de São Domingos, UHE Guaporé hydroelectric dam (approximate coordinates 15070S, 58570W).  
Reproductionoviparous (manual imputation, fide Zimin et al. 2022) 
TypesHolotype: MZUSP 97964, adult male. Collected by the rescue team during lake filling in 2002. Paratypes: Brazil: Mato Grosso: UHE Guaporé: MZUSP 97956– 97963, MZUSP 97965, UFMT 3076–3114, UFMT 3510–3511, UFMT 6277–6280, UFMT 7268; same data as the holotype. 
DiagnosisDiagnosis: Data from species in comparison are given in paren- theses. The new species differs from all other species of Stenocercus except S. caducus, S. dumerilii, S. prionotus, S. quinarius, S. sinesaccus, S. squarrosus and S. tricristatus by having strongly keeled and mucronate body scales, laterally oriented nostrils, and lacking a postfemoral mite pocket.

It differs from Stenocercus caducus and S. prionotus by lacking a posthumeral mite pocket (present). It can be distinguished from S. dumerilii, S. tricristatus, S. quinarius and S. squarrosus by lacking triangularly enlarged horn-like post-supraciliaries (present). From S. caducus it can be further distinguished by the presence of com- plete dorsolateral crests (incomplete) and higher number of scales along the white line on forelimb, 4–10 (1–5) (Supplementary Fig. S5). From S. sinesaccus, the new species differs by having a higher number of vertebral scales, 32–45 (26–34), paravertebrals, 36–53 (32–41), scales around body, 31–41 (27–36), transverse dorsals between dorsolateral crests, 11 in 75% of the individuals (9 in 88% of the individuals), scales along the white line on forelimb, 4–10 (1–5) (Supplementary Fig. S5) and ventrals, 19–27 (16–21). Furthermore, S. albolineatus sp. nov. lacks a complex pattern of markings over the shoulder (present in S. caducus) and a whitish scale on the anterior border of the ear (present in S. sinesaccus).
The new species is currently known to be sympatric with Stenocercus roseiventris. Besides overall body color and enlarged scales on tail, which produce a spiny shape in S. roseiventris, the new species can be distinguished by lower number of vertebral scales 32–45 (50–59), paravertebrals, 36–53 (64–75), scales around body, 31–41 (59–64), gulars, 11–20 (30–35), and transverse dorsals between dorsolateral crests, 9–13 (15–19), as well as higher number of lamellae under the fourth toe, 21–30 (17–20) and caudal scales, 111–136 (49–52). 
CommentThe description was apparently published in lates 2015, although the final pdf says “2016”.

Similar species: S. sinesaccus, with which it may have been confused before.

Distribution: Map: see TEIXEIRA et al. 2016: 417. 
EtymologyThe specific epithet albolineatus is derived from the Latin words albus (=white) and linea (=line) and atus (=that bears), as all members of the new species present a whitish line on the anterior surface of the forelimbs, characteristic of this species. 
  • Gonzalez R. C. et al. 2020. Lista dos Nomes Populares dos Répteis no Brasil – Primeira Versão. Herpetologia Brasileira 9 (2): 121 – 214 - get paper here
  • Ribeiro-Júnior, Marco A. & Silvana Amaral 2016. Diversity, distribution, and conservation of lizards (Reptilia: Squamata) in the Brazilian Amazonia. Neotropical Biodiversity, 2:1, 195-421 - get paper here
  • Teixeira, Mauro; Ivan Prates, Carolina Nisa, Nathalia Suzan Camarão Silva-Martins, Christine Strüssmann, Miguel Trefaut Rodrigues 2015. Molecular data reveal spatial and temporal patterns of diversification and a cryptic new species of lowland Stenocercus Duméril & Bibron, 1837 (Squamata: Tropiduridae). Molecular Phylogenetics and Evolution 94: 410-423 (2016), doi:10.1016/j.ympev.2015.09.010 - get paper here
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
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