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Gymnodactylus geckoides SPIX, 1825

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Higher TaxaPhyllodactylidae, Gekkota, Sauria, Squamata (lizards: geckos)
Subspecies 
Common NamesE: Naked-toed Gecko
G: Brasilianischer Nacktfingergecko
Portuguese: Briba, Lagartinho, Lagartixa, Lagartixa-do-Cerrado 
SynonymGymnodactylus geckoides SPIX 1825: 17
Stenodactylus geckoides — FITZINGER 1826: 48
Ascalabotes geckoides — BOIE 1826: 119
Ascalabotes geckoides — FITZINGER 1827: 746
Gymnodactylus geckoides — CUVIER 1829: 58
Cyrtodactylus spixii GRAY 1831: 52 (substitute name for G. geckoides)
Gecko gymnodactylus SCHINZ 1833: 75 (substitute name for G. geckoides)
Gonyodactylus (Dasyderma) spinulosus FITZINGER 1843: 92 (subst. name)
Gymnodactylus geckoides — BOULENGER 1885: 39
Gymnodactylus conspicuus AMARAL 1933: 57
Gymnodactylus geckoides geckoides — VANZOLINI 1953: 252
Gymnodactylus geckoides geckoides — RÖSLER 2000: 85
Gymnodactylus geckoides — CASSIMIRO & RODRIGUES 2009 
DistributionBrazil (Ceará, Rio Parnahyba to Rio das Mortes, Goias, Bahia, Pernambuco, Alagoas, Sergipe, Espirito Santo, Rio de Janeiro, Sao Paulo, Paraiba, Villa Nova, Minas Gerais; “Caatinga in northeastern Brazil”, Rio Grande do Norte, Piauí), Trinidad ?

Type locality: Bahia, Brazil.  
Reproductionoviparous 
TypesHolotype: lost fide Hoogmoed and Gruber 1983: 392 
DiagnosisDiagnosis (genus): Gymnodactylus is characterized by gymnodactily, or the presence of free fingers without dilations, bearing wide, undivided subdigital lamellae; distal phalanges elevated above the basal ones; nail placed between two scales, the ventral scale indented; straight, vertical pupils, and an heterogeneous dorsal lepidosis, with granules and tubercles (Vanzolini 1968a; 1982). Except for the absence of bent fingers, Homonota is the only South American gekkonid sharing with Gymnodactylus all external characters mentioned above. Cacciali et al. (2007) erroneously considered Homonota as the only South American genus presenting fingers without dilations, overlooking its occurrence in Gymnodactylus and Garthia, as well as in some sphaerodactyls. Nevertheless, Gymnodactylus can be distinguished promptly from Homonota by having digits more angulated with large and distended proximal subdigital lamellae, by having a much larger mental, enlarged postmentals, and some myological and osteological differences in the skull and pectoral girdle (Abdala & Moro 1996; Kluge 1964). Garthia, on the other hand, presents an homogeneous dorsal lepidosis, lobate pupil (Vanzolini 1968a; Vanzolini & Donoso-Barros 1966), and double frontal bone (Abdala 1996). Other South American gekkonid genera with gymnodactily are Coleodactylus, Gonatodes, Lepidoblepharis and Pseudogonatodes that are presently included in a different tribe (Sphaerodactylini, according to Kluge 1967; 1987), or subfamily (Sphaerodactylinae, Underwood 1954; 1955), or family (Sphaerodactylidae, Gamble et. 2008). Externally they can be immediately separated from Gymnodactylus by presenting round pupils and homogeneous dorsal scales (Parker 1926; Vanzolini 1967; 1968a). Coleodactylus, Lepidoblepharis and Pseudogonatodes have a claw surrounded by four or more scales (Avila-Pires 1995; Kluge 1964; Vanzolini 1967; 1968a) [from CASSIMIRO & RODRIGUES 2009].


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CommentSynonymy after PETERS & DONOSO-BARROS 1970: 135.

Subspecies: Gymnodactylus geckoides amarali BARBOUR 1925 has been elevated to full species status.

Type species: Gymnodactylus geckoides SPIX 1825 is the type species of the genus Gymnodactylus SPIX 1825.

Distribution: amarali probably also in Bolivia (fide LANGSTROTH 2005). 
EtymologyNamed after Latin gecko, liard species due to Linnaeus, 1758 + Greek -oides (-οειδής), suffix indicating likeness. (Esteban Lavilla, pers. comm., April 2024)

The genus was named after Greek gymnos (γυμνός), naked; unarmed + Greek dactylos (δάκτυλος), finger, toe. 
References
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