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Trachylepis albilabris (HALLOWELL, 1857)

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Higher TaxaScincidae, Mabuyinae (Mabuyini), Scincoidea, Sauria, Squamata (lizards)
Common NamesE: Guinea Mabuya 
SynonymEuprepes albilabris HALLOWELL 1857
? Euprepes frenatus HALLOWELL 1857
Mabuia raddoni — BOULENGER 1887 (part.)
Mabouia raddoni — GÜNTHER 1896: 264
Mabuia albilabris BOULENGER 1905
Mabuya raddoni — SCHMIDT 1919: 534 (part.)
? Mabuia Raddoni — CHABANAUD 1921 (part.)
Mabuya blandingii — LOVERIDGE 1936 (part.)
Mabuya albilabris — HOOGMOED 1974: 13
Mabuya albilabris — GREER et al. 2000
Euprepis albilabris — MAUSFELD et al. 2002
Trachylepis albilabris — BAUER 2003
Trachylepis albilabris — PAUWELS et al. 2004
Mabuya albilabris — BURGER et al. 2004
Trachylepis albilabris — SPAWLS et al. 2018: 133 
DistributionGuinea (Conakry), Ivory Coast, Ghana, Cameroon, Equatorial Guinea, Gabon, Uganda [HR 31: 254], Sierra Leone ?, Liberia ?, Togo ?, Benin ?, Nigeria ?, Democratic Republic of the Congo (Zaire).

Type locality: Gabon.

Euprepis frenatus Hallowell, 1857, type locality, “Liberia.”  
TypesHolotype: lost, was probably in ANSP, but now possibly lost (not mentioned by Malnate 1971), fide Glenn Shea, pers. comm., 19 May 2019 
DiagnosisDiagnosis. A medium-sized lizard with a moderately long tail. A pair of nuchals is present, the supranasals are usually separated, the prefrontals form a distinct suture in most specimens. Only one scale between the fourth supraocular and the anterior supratemporal. The posterior supratemporal is larger than the anterior one. Dorsals tricarinate. The number of lamellae under the fourth toe varies between 14 and 18, but mostly is 15 or 16. Under the fourth finger there are 11-15, mostly 11 or 12 lamellae. Brown above, flanks dark-brown, either ventrally bordered by a narrow white lateral line or not. Belly greenish-white, males with black spots on the throat. A light spot on the side of the neck in adult specimens (Hoogmoed 1974: 14).

The most constant character is the number of scales between the fourth supraocular and the anterior supratemporal. In albilabris this always is one, no specimens were found with two scales. In affinis the number is nearly always two, only exceptionally it may be one. Another important character in which the two species differ is the number of subdigital lamellae, low in albilabris, high in affinis. This is not a very clear-cut character because a certain amount of overlap occurs (Figs. 5, 16), but it is safe to say that specimens with 14 or 15 lamellae under the fourth toe and 11 or 12 lamellae under the fourth finger are M. albilabris. In life M. albilabris shows a wide yellow zone from the lips to the insertion of the forelimbs or a yellow spot just in front of the forelimbs. In M. affinis there never is any yellow on the dorsal and lateral surfaces, at most the upper lips are orange. In M. albilabris the throat in males has black spots more or less clearly arranged in longitudinal rows. In M. affinis the throat is nearly always immaculately white. The ventral surface in preserved M. albilabris is bluish white, whereas in M. affinis it is pure white or yellowish white. (Hoogmoed 1974: 23). 
CommentSynonymy after HOOGMOED 1974. Schmidt (1919) considered albilabris (as previous authors) as a synonym of blandingii (= affinis). Euprepes aureogularis MÜLLER 1885 has been removed from the synonymy of T. albolabris.

Distribution: Not listed in LeBreton 1999 for Cameroon.

Similar species: T. affinis (and others). See Diagnosis. 
EtymologyNamed after Latin “albus, -a, -um” = white and “labrum” = lip. 
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