Alopoglossus theodorusi RIBEIRO-JÚNIOR, MEIRI & FOUQET, 2020
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Alopoglossus theodorusi
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| Higher Taxa | Alopoglossidae, Sauria, Gymnophthalmoidea, Squamata (lizards) |
| Subspecies | |
| Common Names | |
| Synonym | Alopoglossus theodorusi RIBEIRO-JÚNIOR, MEIRI & FOUQET 2020 Alopoglossus angulatus — DEWYNTER et al. 2020 (part) Alopoglossus ‘‘French Guiana lineage’’ — RIBEIRO-JÚNIOR et al. 2020 |
| Distribution | French Guiana, Brazil (Amapá state) Type locality: Saut Maripa, St. Georges, French Guiana (38º48’40.17”N, 51º53’22.72”W) |
| Reproduction | |
| Types | Holotype: MNHN-RA-2020.0019, Adult female, collected on 03 May 2012, by A. Fouquet, field number AF740. Paratypes (n = 2): MNHN-RA-2020.0020, adult females, from Armontabo, French Guiana, collected on 30 August 2003, by P. Gaucher, field number PG172, and MNHN-RA-2020.0021, from Mont Galbao, French Guiana, collected on 19 October 2018, by E. Courtois & M. Dewynter, field number AF4793. |
| Diagnosis | Diagnosis: (1) Scales on sides of neck keeled, imbricate (at least medial and posterior ones phylloid), in 9–10 transverse rows; (2) prefrontals separated from each other by the contact between frontonasal and frontal, or prefrontals with a short contact between them; (3) three pairs of chin shields; (4) third pair of chin shields with rounded posterior margins, in direct contact with gulars; (5) scales of the third pair of chin shields in contact with each other anteriorly, and separated from each other by small scales posteriorly; (6) temporal scales smooth or feebly keeled (temporal region with a smooth general aspect). Comparisons: Alopoglossus theodorusi differs from A. atriventris, A. buckleyi, A. copii, A. embera, A. festae, A. lehmanni, and A. viridiceps (in parenthesis) in having scales on sides of neck similar in shape to dorsals, nongranular, 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 having gulars not 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); from A. atriventris and A. buckleyi in having three pairs of chin shields (vs. four pairs). In the Alopoglossus angulatus species group, Alopoglossus theodorusi differs from A. meloi (also distributed in the Guiana Shield lowlands) and A. amazonius 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 irregularly trapezoidal, separated from gulars by large scales); it also differs from A. meloi in having scales on sides of neck in 9–10 transverse rows (vs. 6–8), and from A. amazonius in having lower number of femoral pores in males (22 vs. 24–28). Alopoglossus theodorusi differs from A. angulatus (distributed in eastern Amazonia, and occurring in sympatry with Alopoglossus theodorusi in the eastern Guiana Shield) in having prefrontals widely separated from each other by the contact between frontonasal and frontal or prefrontals with a short contact with each other (vs. prefrontals with a long contact with each other medially), scales of the third pair of chin shields in contact with each other anteriorly (vs. scales of the third pair of chin shields completely separated from each other by small scales), temporal scales smooth or weakly keeled, with a smooth general aspect (vs. temporal scales strongly keeled), and a higher number of transverse rows of scales on sides of neck (9–10 vs. 6–9). Alopoglossus theodorusi differs from A. avilapiresae (the closest related species) in having prefrontals widely separated from each other by the contact between frontonasal and frontal or prefrontals with a short contact with each other (vs. prefrontals with a long contact with each other medially), lower number of transverse rows of scales on sides of neck (9–10 vs. 10–13), and lower number of femoral pores in males (22 vs. 23–29). Alopoglossus theodorusi differs from A. andeanus and A. carinicaudatus in having lower number of transverse rows of scales on sides of neck (9–10 vs. 11–12), and lower number of femoral pores in males (22 vs. 24–28 in A. andeanus and 22–26 in A. carinicaudatus); it also differs from A. andeanus by absence of a distinct, enlarged medial pair of pregular scales, and from A. carinicaudatus by having third pair of chin shields rounded posteriorly (vs. third pair of chin shields irregularly quadrangular, with anterior and posterior margins almost parallel, straight). It differs from A. colli in having smooth general aspect of temporals (vs. strongly keeled temporals), higher number of transverse rows of scales on sides of neck (9–10 vs. 8–9), and higher number of femoral pores in males (22 vs. 19–22). |
| Comment | Sympatry: Alopoglossus angulatus. Similar species: A. avilapiresae |
| Etymology | The specific epithet is a noun in the genitive case honoring herpetologist Theodorus Willem van Lidth de Jeude, in recognition of his valuable contribution to the knowledge of the reptiles, especially from the Guiana Shield and Caribbean Islands. |
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