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Alopoglossus andeanus (RUIBAL, 1952)

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Higher TaxaAlopoglossidae, Sauria, Gymnophthalmoidea, Squamata (lizards)
Subspecies 
Common Names 
SynonymAlopoglossus andeanus RUIBAL 1952: 510
Alopoglossus andeanus — RIBEIRO-JÚNIOR et al. 2020: 20 
DistributionPeru (Puno, Madre de Dios)

Type locality: La Pampa, Dpto. Puno, Peru, 760 m elevation, (13°39′S, 69°36′W)  
Reproductionoviparous 
TypesHolotype: MCZ 45590, adul male 
DiagnosisDiagnosis: Alopoglossus andeanus is distinguished from all other species of Alopoglossus by the combination of the following characters: (1) scales on the sides of the neck non-granular, keeled, imbricate (at least medial and posterior ones phylloid), in 11 or 12 transverse rows; (2) three pairs of chin shields; (3) third pair of chin shields with rounded posterior margins, in direct contact with gulars; (4) presence of a pair of medial enlarged pregular scales; (5) scales on gular region varying in shape and size: lateral ones strongly keeled, pointed, phylloid; anterior, medial and posterior ones varying from smooth to feebly keeled, bluntly pointed; medial and posterior ones larger than anterior and lateral ones; (6) ventral scales smooth, mucronate, imbricate, with bluntly pointed posterior margins; (7) total number of femoral pores in males 24–28 (RIBEIRO-JÚNIOR et al. 2020: 20).

Comparison with other species: Alopoglossus andeanus differs from A. atriventris, A. buckleyi, A. copii, A. embera, A. festae, A. lehmanni and A. viridiceps (in parentheses) in having scales on the sides of the neck similar in shape to dorsals, non-granular, keeled, imbricate (granular in A. atriventris and A. buckleyi; mostly granular in A. embera, A. festae, A. lehmanni and A. viridiceps; conical with apparent bare skin between conical scales in A. copii); it also differs from A. embera, A. festae and A. viridiceps in not having gulars arranged in two longitudinal rows (vs. a double longitudinal row of widened gular scales); from A. lehmanni in having dorsal scales rhomboidal, in oblique rows (vs. dorsal scales hexagonal with parallel lateral edges, in transverse rows). Alopoglossus andeanus differs from A. angulatus, A. amazonius, A. avilapiresae, A. carinicaudatus and A. meloi in having a pair of medial enlarged pregular scales (vs. absent). It also differs from A. angulatus in having scales on sides of neck in 11 or 12 transverse rows (vs. six to nine), and scales on medial and posterior gular regions larger than anterior and lateral ones (vs. scales on medial and posterior gular regions subequal in size to anterior and lateral ones); from A. carinicaudatus in having the third pair of chin shields in direct contact with gulars (vs. third pair of chin shields separated from gulars by a row of small, granular scales), anterior ventral scales smooth (vs. anterior ventral scales strongly keeled), and scales on medial gular region larger than scales on lateral gular region, varying from smooth to feebly keeled, bluntly pointed (vs. scales on medial gular region subequal in size to scales on lateral gular region, strongly keeled, pointed). Alopoglossus andeanus also differs from A. amazonius and A. meloi in having three pairs of chin shields (vs. four pairs), and third pair of chin shields with rounded posterior margins, in direct contact with gulars (vs. third pair of chin shields irregularly trapezoidal, separated from gulars by large scales). It differs from A. collii in having scales on the sides of the neck in 11 or 12 transverse rows (vs. eight or nine) and the total number of femoral pores 24–28 in males (vs. 19–22) (RIBEIRO-JÚNIOR et al. 2020: 20).
 
CommentSynonymy: Alopoglossus andeanus RUIBAL 1952 has been synonymized with A. angulatus by KÖHLER et al. 2012 but revalidated by RIBEIRO-JÚNIOR et al. 2020.

Distribution: see maps in KÖHLER et al. 2012, RIBEIRO-JÚNIOR 2018: 33 (Fig. 5), RIBEIRO-JÚNIOR et al. 2020: 39 (Fig. 20).

Habitat: montane Amazonian forest. 
References
  • Ribeiro-Junior, M. A., Choueri, E., Lobos, S., Venegas, P., Torres-Carvajal, O. and Werneck, F. 2020. Eight in one: morphological and molecular analyses reveal cryptic diversity in Amazonian alopoglossid lizards (Squamata: Gymnophthalmoidea). Zoological Journal of the Linnean Society - get paper here
  • Ruibal, R. 1952. Revisionary notes of some South American Teiidae. Bull. Mus. Comp. Zool. Harvard 106: 475-529 (477?)-529. - get paper here
 
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