Trigonodactylus arabicus HAAS, 1957
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Trigonodactylus arabicus
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| Higher Taxa | Gekkonidae, Gekkota, Sauria, Squamata (lizards: geckos) |
| Subspecies | |
| Common Names | E: Arabian Short-fingered Gecko, Arabian Sand Gecko |
| Synonym | Trigonodactylus arabicus HAAS 1957: 51 Stenodactylus arabicus — KLUGE 1967 Stenodactylus arabicus — KLUGE 1993 Stenodactylus arabicus — RÖSLER 2000: 115 Stenodactylus arabicus — FUJITA & PAPENFUSS 2011 Stenodactylus arabicus — GARDNER 2013 Trigonodactylus arabicus — NAZAROV et al. 2018 Stenodactylus arabicus — KAMALI 2020 |
| Distribution | Saudia Arabia, Qatar, United Arab Emirates, S Oman, Bahrain, Kuwait, Iran, Jordan Type locality: Trucial Coast, Saudi Arabia (24° 10’ N, 53° E). |
| Reproduction | oviparous |
| Types | Holotype: CAS 84321; paratypes: CAS, FMNH |
| Diagnosis | Diagnosis (genus): Ground-dwelling, psammophilous, small-sized geckos (SVL less than 40 mm versus SVL more than 40 mm in Stenodactylus and Pseudoceramodactylus). Habitus very slender. Head and body strongly flattened (as compared with massive head and round body in Stenodactylus and Pseudoceramodactylus). Head elongated and relatively narrow as opposed to large, well-defined head in Stenodactylus and Pseudoceramodactylus. Edges of fingers and toes with large elongated triangular scales that form a fringed edge. Claws thin and long, significantly compressed. Minute, imbricate, triangular scales cover undersides of fingers; only a few transversely widened scales at their tips (usually three). Upper surface of hands covered with keeled, imbricate, rather elongated scales. Toes elongated, slender, with strongly compressed long claws; margins of toes fringed; web between fingers present in some species. Dorsal scales flat, juxtaposed with each other, slightly keeled, elliptic. Ventral scales slightly keeled. Contracted pupil forms a vertical slit. No precloacal or femoral pores (present in some Stenodactylus). Moderate hemipenial swellings; two-three precloacal spurs on each side at basis of tail. Tail round in cross-section, tapering uniformly; length equal to that of body. Prefrontal relatively small with rounded distal surface; no prefrontal projection; postorbitofrontal relatively small with rounded distal edge; nasal relatively small, of same size as premaxillary (versus relatively larger prefrontal often with apical growth, relatively larger posterior frontal with elongated distal edge, which are typical for representatives of Stenodactylus and Pseudoceramodactylus. Locomotion of this group of geckos is very distinctive. Trigonodactylus move pressing their body to the surface of the substrate, where Stenodactylus keep their body raised high above the surface (from Nazarov et al. 2018; original diagnosis in Haas 1957: 51). |
| Comment | Synonymy: WERMUTH 1965 gives “Stenodactylus arabicus” also as original name. Trigonocephalus HAAS 1957 was resurrected from synonymy of Stenodactylus by Nazarov et al. 2018 (note that Nazarov et al. mis-spelled Haas as “Hass” more often than it was spelled correctly as “Haas”). Distribution: See map in SMID et al. 2014 for distribution in Iran. See map in Burriel-Carranza et al. 2019 for map in UAE. Type species: Trigonodactylus arabicus HAAS 1957 is the type species of the genus Trigonodactylus HAAS 1957. |
| Etymology | Named after the type locality. |
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