Uromastyx geyri MÜLLER, 1922
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| Higher Taxa | Agamidae (Uromastycinae), Sauria (lizards) |
| Subspecies | |
| Common Names | E: Geyr’s Spiny-tailed Lizard, Sahara Mastigure G: Geyrs Dornschwanzagame |
| Synonym | Uromastyx temporalis VALENCIENNES 1854 (?) Uromastix geyri MÜLLER 1922: 193 Uromastyx acanthinurus geyri — MERTENS 1962: 430 Uromastyx acanthinurus geyri — WERMUTH 1967: 101 Uromastyx (acanthinura) geyri — SCHLEICH, KÄSTLE & KABISCH 1996: 310 Uromastyx geyri — WILMS & BÖHME 2001 Uromastyx geyri — WILMS et al. 2009 |
| Distribution | South Algeria, Mali and Niger (Air and Hoggar Mountain area). Type locality: entre Aquebly et Djebbel-Hoggar, Sahara. Lectotype: Gara Djenoum, Ahaggar Mts. Algeria, S Algeria. Map legend:  - Region according to the TDWG standard, not a precise distribution map.NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it. |
| Types | Neotype: ZFMK 9230 (designated by MÜLLER 1951) |
| Comment | Status of Uromastyx temporalis unclear. Differential diagnosis: U. geyri is distinguished from U. thomasi and U. princepsby the longer and narrower tail (65.45–98.06 % of SVLin U. geyri vs. 25.00–36.16 % in U. thomasiand 34.62–52.55 % in U. princeps); from the species of the U. ocellata group and U. macfadyeniby the arrangement of the annuli of the tail: last 8–21 forming a continuous scale row each (U. ocellatagroup and U. macfadyeni) vs. 2–5 whorls forming a continuous scale row in U. geyri; from U. aegyptiaand U. occidentalisby the lower scale counts around midbody (238–322 in U. aegyptia, 297–301in U. occidentalis vs. 142–196 in U. geyri), from U. acanthinura, U. nigriventrisand U. dispar by its longer tail (65.45–98.06 % of SVLin U. geyri vs. 50.27–74.42 in U. acanthinura, 47.83–70 % in U. disparand 43.48–75.14 % in U. nigriventris). From U. alfredschmidtiit is distinguished by differences in the scalation of the flanks (enlarged triangular and imbricate scales in U. alfredschmidti vs. enlarged tubercular scales in U. geyri), as well as the complete black colouration of adult males in U. alfredschmidti. |
| Etymology | named after ornithologist H. Geyr von Schweppenburg who brought the first specimens of this species to Europe. |
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