Alopoglossus amazonius, RUTHVEN, 1924

Ribeiro-Júnior, Marco Antonio, Choueri, Erik, Lobos, Simon, Venegas, Pablo, Torres-Carvajal, Omar & Werneck, Fernanda, 2019, Eight in one: morphological and molecular analyses reveal cryptic diversity in Amazonian alopoglossid lizards (Squamata: Gymnophthalmoidea), Zoological Journal of the Linnean Society 190, pp. 227-270 : 241

ALOPOGLOSSUS AMAZONIUS RUTHVEN, 1924

[ FIGS 2–4 ( A. ANGULATUS ‘G. MIRIM’), FIGS 7B, C, 8, 9; TABLES 1 AND 2]

Pantodactylus amazonius Burt & Burt (1931: 358) .

Pantodactylus amazonicus Amaral (1937: 1741) .

Alopoglossus carinicaudatus Ruibal (1952: 508 , part); Peters & Donoso-Barros (1970: 15, part).

Alopoglossus angulatus Ávila-Pires (1995: 307 , part); Köhler et al. (2012: 176, part).

Holotype: UMMZ 5 6 8 5 3, male, Brazil, VILLA MURTINHO, MATTO GROSSO (= VILA MURTINHO, Nova Mamoré municipality, State of RONDÔNIA; 10°23 ′ 58.6 ″ S, 65°21 ′ 51.8 ″ W), 6 APRIL 1922, JESSE Williamson ( Figs 8, 9).

Material examined: Twenty-seven (N = 27) referred specimens for morphological analyses and one sample for molecular analyses from Brazil (see Supporting Information; Table S1 and Referred Specimens).

Diagnosis

Alopoglossus amazonius is distinguished from all other species of Alopoglossus by the combination of the following characters: (1) scales on sides of neck non-granular, keeled, imbricate (at least medial and posterior ones phylloid), in nine to 13 transverse rows; (2) four pairs of chin shields; (3) third pair of chin shields irregularly trapezoidal, separated from gulars by large scales; (4) absence 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 and medial ones varying from smooth to feebly keeled, phylloid; posterior ones varying from smooth to feebly keeled, almost rounded posteriorly, larger than lateral, anterior and medial ones; (6) ventral scales mucronate, imbricate, with bluntly pointed posterior margins (almost rounded), varying from smooth to feebly keeled; (7) total number of femoral pores in males 24–28.