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Alopoglossus collii RIBEIRO-JÚNIOR, CHOUERI, LOBOS, VENEGAS, TORRES-CARVAJAL & WERNECK, 2020

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Higher TaxaAlopoglossidae, Sauria, Gymnophthalmoidea, Squamata (lizards)
Subspecies 
Common Names 
SynonymAlopoglossus collii RIBEIRO-JÚNIOR, CHOUERI, LOBOS, VENEGAS, TORRES-CARVAJAL & WERNECK 2020 
DistributionBrazil (Rondônia, Mato Grosso)

Type locality: Brazil, State of Rondônia, Pimenta Bueno (11°51′45.2′′S, 60°56′18 ′′W).  
Reproduction 
TypesHolotype: CHUNB 18038, female, between 1 July and 24 August 2000, Guarino Colli, field number GRCOLLI 5572.
Paratypes: Brazil: State of Mato Grosso: UFMT 4105, PCH Ombreiras Margem direita do Rio Jauru (15°19′2.3′′S, 58°51′42.8′′W); State of Rondônia: CHUNB 18037, CHUNB 18039–18040 and CHUNB 18599, males, Pimenta Bueno (11°51′45.2′′S, 60°56′18 ′′W), between 1 July and 24 August 2000, Colli, field numbers GRCOLLI 5816, 5757, 5681 and 5684, respectively; CHUNB 11472, male, Vilhena (12°07′19.1′′S, 60°16′39.1′′W), between 20 August and 22 September 1999, Mesquita, field number GRCOLLI 4041. 
DiagnosisDiagnosis: Alopoglossus collii 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 eight or nine transverse rows; (2) three pairs of chin shields; (3) third pair of chin shields with rounded posterior margins, in direct contact with gulars or separated from them by small scales; (4) absence of a pair of medial enlarged pregular scales (see Remarks below); (5) scales on gular region varying in shape and size: lateral ones strongly keeled, pointed, phylloid (except the anterior ones); the first three anterior transverse rows with scales smooth, almost rounded, larger than those in the proceeding row (anteriormost row with the largest scales); medial and posterior ones smooth, almost rounded, bluntly pointed, larger than lateral ones; (6) ventral scales mucronate, imbricate, with bluntly pointed posterior margins, varying from smooth to feebly keeled; (7) total number of femoral pores in males 19–22.

Comparison with other species (excluding Ptychologlossus): Alopoglossus collii 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 collii differs from A. angulatus in having scales on medial and posterior gular regions bluntly pointed, almost rounded, larger than scales on lateral gular region (vs. scales on medial and posterior gular regions phylloid, subequal in size to lateral ones), scales in the first transverse row (anteriormost) of the gular region larger than those in proceeding rows on the anterior region [vs. scales in the first transverse row (anteriormost) of gular scales similar in size to, or slightly smaller than, those in proceeding rows], higher number of ventral scales (18 or 19 vs. 14–18) and a lower total number of femoral pores in males (19–22 vs. 20–29). Alopoglossus collii differs from A. amazonicus and A. meloi in having three pairs of chin shields (vs. four pairs), and the third pair of chin shields in direct contact with gulars or separated from them by a row of small scales (vs. third pair of chin shields separated from gulars by large scales). Alopoglossus collii differs from A. andeanus and A. avilapiresae in having scales on the sides of the neck in eight or nine transverse rows (vs. 11 or 12 in A. andeanus; 10–13 in A. avilapiresae), 19–22 total number of femoral pores in males (vs. 24–28 in A. andeanus; 23–29 in A. avilapiresae). Alopoglossus collii differs from A. carinicaudatus in having scales on the sides of the neck in eight or nine transverse rows (vs. 11 or 12), third pair of chin shields with rounded posterior margins, in direct contact with gulars or separated from them by small scales [vs. third pair of chin shields irregularly quadrangular (anterior and posterior margins almost parallel), with straight posterior margins, separated from gulars by a row of small scales], and scales on the medial gular region bluntly pointed, almost rounded (vs. scales on medial gular region strongly keeled, phylloid). 
CommentHabitat: leaf litter in dry open forest. 
EtymologyThe specific epithet is a noun in the genitive case honouring herpetologist Guarino Rinaldi Colli in recognition of his valuable contribution to the knowledge on the lizards of the Cerrado, especially in the State of Rondônia, Brazil. 
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
  • Ribeiro-Júnior, Marco Antônio; Shai Meiri, Antoine Fouquet 2020. A New Species of Alopoglossus Boulenger (1885) (Squamata, Alopoglossidae) from the Lowlands of the Eastern Guiana Shield, with Assessment of the Taxonomic Status of A. copii surinamensis. Journal of Herpetology 54 (4): 427-445 - get paper here
 
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