Acanthocercus guentherpetersi LARGEN & SPAWLS, 2006
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Acanthocercus guentherpetersi
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| Higher Taxa | Agamidae (Agaminae), Sauria, Iguania, Squamata (lizards) |
| Subspecies | |
| Common Names | E: Peter’s Ridgeback Agama |
| Synonym | Acanthocercus guentherpetersi LARGEN & SPAWLS 2006: 28 |
| Distribution | Ethiopia Type locality: ca 40 km E of Harar on the road to Jigjiga, Ethiopia (09°12’N 42°22’E, elevation 1500 m). |
| Reproduction | oviparous |
| Types | Holotype: BMNH 1969.1254, adult male, collected 21 September 1968 by the Great Abbai Expedition. Paratypes. female (BM 1969.1253), ca 20 km E of Harar on the road to Jigjiga, Ethiopia (09°12’N 42°15’E, 1500 m), 21 September 1968, Great Abbai Expedition; female, 3 juveniles (BM 1970.1449-1452), “dakhato” (= dacata) River, between Harar and Jigjiga, Ethiopia (09°12’N 42°25’E, ca 1400 m), 30 September 1934, R.H.R. Taylor; male (ZMB 36922), “Abessinien” (= Ethiopia), E. Wache; male, female (ZFMk 19450-19451), Af Abed, Eritrea (16°14’N 38°46’E ), 7 Febru- ary 1938, von Saalfeld; male (BM 1915.3.9.1), Habesch (region), Eritrea (ca 15°40’N 39°00’E), G. Schroeder; 3 males (ZMB 18428, 54567-54568), Eritrea, G. Schrader (= Schroeder?) |
| Diagnosis | Diagnosis: Similar to A. phillipsii in habitus and probably coloration, but sig- nificantly larger, the snout-vent length of males 77-102 (mean 88.8) mm, n = 7 and of females 72-81 (77.7) mm, n = 3 [in A. phillipsii males 77-10262-85 (71.5) mm, n = 9 and females 55-70 (64.3) mm, n = 12]; enlarged, keeled and mucronate scales on the flanks gen- erally few in number, widely dispersed or in weak and isolated transverse rows [in A. phillipsii such scales are closely compacted into a series of distinct transverse rows occupying a restricted area at mid-flank]; posterodorsal face of the thigh with a few large, keeled and mucronate scales irregularly arranged and intermingled with numerous smaller ones [in A. phillipsii this region of the femur has only large, regularly arranged scutes that are clearly separated from the small scales of the underside]; caudal scale rows (at a distance behind the vent equivalent to the maxi- mum breadth of the tail) 20-29 (mean 23.8), n = 13 [in A. phillipsii: caudal scale rows only 16-21 (18.1), n = 28]. Further information may be obtained from PeterS (1982) [from LARGEN & SPAWLS 2006: 29]. |
| Comment | Similar species: has been confused with Agama cyanogaster phillipsi (not Boulenger 1895); KLAUSEWITZ 1954: 145 and Agama phillipsii (not Boulenger 1895); PETERS 1982: 266-268. Genome: Colston et al. 2025. |
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