Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk).
Latest update: October 31st, 2023.
 
|
Genus
Acanthocercus
 |
Ridgeback Agamas
|
 |
Keilrückenagamen
|
 |
Kølrygagamer
|
|
1843 |  |
Acanthocercus Fitzinger (type species: Stellio erythrogaster Nikolski 1896) |
Contents:
15 species, of which 1 (6.7%) is endemic.
Endemism: 0%  100%
Remarks:
Previously regarded as a synonym of Agama (e.g., Wermuth 1967).
Although the revalidation of Acanthocercus was suggested by Baig & Böhme (1991), the formal resurrection was made by Schätti & Gasparetti (1994) and
confirmed by Baig & Böhme (1997).
Distribution:
Angola,
Botswana,
Burundi,
Congo-Kinshasa,
Djibouti,
Eritrea,
Eswatini,
Ethiopia,
Kenya,
Malawi,
Mozambique,
Namibia,
Oman,
Rwanda,
Saudi Arabia,
Somalia,
South Africa
(Gauteng,
KwaZulu-Natal,
Limpopo,
Mpumalanga,
North West Province),
Tanzania,
Uganda,
Yemen,
Zambia,
Zimbabwe.
| |
|
Acanthocercus adramitanus
|
Hadhramaut Ridgeback Agama, (Anderson's Rock Agama)
|
|
Hadhramaut-Keilrückenagame, (Jemen-Agame)
|
|
Hadhramaut-kølrygagam
|
|
1896 | |
Agama adramitana Anderson |
|
| |
Agama cyanogaster adramitana Klausewitz 1954 |
|
| |
Stellio adramitana Joger 1987 |
|
| |
Laudakia adramitana Manthey & Schuster 1992 |
|
| |
Acanthocercus adramitanus Schätti & Gasparetti 1994 |
Distribution:
Oman,
Saudi Arabia,
Yemen.
|
|
|
Acanthocercus annectans
|
Eritrean Ridgeback Agama, Eritrean Rock Agama
|
|
Eritreische Keilrückenagame
|
|
Eritreisk Kølrygagam
|
|
1870 | |
Agama annectans Blanford |
|
| |
Agama cyanogaster annectens Klausewitz 1954 |
|
| |
Stellio annectens Lanza 1983 |
|
| |
Acanthocercus annectens Baig & Böhme 1997 |
Remarks:
Specific epithet often misspelled annectens.
Distribution:
Djibouti,
Eritrea,
Ethiopia,
Kenya,
Somalia.
|
|
|
Acanthocercus atricollis
|
Black-necked Ridgeback Agama, Black-necked Arboreal Agama, Black-necked Tree Agama, Black-necked Agama, Southern Tree Agama, South African Agama
|
|
Blaukehlagame
|
|
Sorthalset Kølrygagam, (Blåhovedet Agam)
|
|
1849 | |
Agama atricollis Smith |
|
| |
Stellio atricolis [sic] Bocage 1896 |
|
| |
Agama cyanogaster atricollis Klausewitz 1953 |
|
| |
Acanthocercus atricollis Baig & Böhme 1997 |
|
1851 | |
Stellio capensis Dumeril in Dumeril & Dumeril (Wagner, Greenbaum, Bauer, Kusamba & Leaché 2018) |
|
1866 | |
Stellio nigricollis Bocage (Wagner, Greenbaum, Bauer, Kusamba & Leaché 2018) |
Remarks:
Previously included or confused with cyanocephalus, gregorii, kiwuensis, margaritae, minutus, and ugandaensis.
Taxonomic history has been turbulent.
Many authors have confused atricollis and cyanogaster.
Boulenger (1896) regarded them as perhaps inseparable, and some authors have synonymised the two (e.g., Parker 1942; Loveridge 1957).
Klausewitz (1957) regarded them as distinct, and also Largen & Spawls (2006) and Wagner & Böhme (2007) regarded them as separate (although somewhat poorly differentiated) species.
Records of atricollis from Congo-Kinshasa refer to other species.
Distribution:
Botswana,
Eswatini,
Malawi,
Mozambique,
South Africa
(Gauteng,
KwaZulu-Natal,
Limpopo,
Mpumalanga,
North West Province),
Zimbabwe.
|
|
|
Acanthocercus branchi
|
Zambian Ridgeback Agama
|
|
Sambianische Keilrückenagame
|
|
Zambiansk Kølrygagam
|
|
2012 | |
Acanthocercus branchi Wagner, Greenbaum & Bauer |
Distribution:
Congo-Kinshasa,
Malawi,
Zambia.
|
|
|
Acanthocercus ceriacoi
|
Cangandala Ridgeback Agama, (Ceríaco's Tree Agama)
|
|
Cangandala-Keilrückenagame
|
|
Cangandala-kølrygagam
|
|
2022 | |
Acanthocercus ceriacoi Marques, Parrinha, Santos, Bandeira, Butler, Sousa, Bauer & Wagner |
Distribution:
Angola.
|
|
|
Acanthocercus cyanocephalus
|
Blue-headed Ridgeback Agama, Angolan Tree Agama
|
|
Blaukopfagame
|
|
Blåhovedet Kølrygagam
|
|
1925 | |
Agama cyanocephala Falk |
|
| |
Acanthocercus cyanocephalus Ceríaco, Bauer, Blackburn & Lavres 2014 |
Remarks:
Previously regarded as a synonym of atricollis (e.g., Wermuth 1967) or confused with margaritae.
Revalidated as a separate species by Ceríaco, Bauer, Blackburn & Lavres (2014), who referred to the then unpublished revisionary work by
Wagner, Greenbaum, Bauer, Kusamba & Leaché (2018).
Records from Namibia and western Angola refer to margaritae (Wagner, Butler, Ceríaco & Bauer 2021).
Distribution:
Angola,
Congo-Kinshasa,
Zambia.
|
|
|
Acanthocercus cyanogaster
|
Blue-bellied Ridgeback Agama, Blue-throated Agama, (Blue-headed Tree Agama)
|
|
Blaubäuchige Keilrückenagame
|
|
Blåbuget Kølrygagam
|
|
1835 | |
Stellio cyanogaster Rüppell |
|
| |
Agama cyanogaster Blanford 1870 |
|
| |
Acanthocercus cyanogaster Baig & Böhme 1997 |
Remarks:
Previously confused with atricollis.
According to Largen & Spawls (2006), cyanogaster is currently known with certainty only from Ethiopia and Eritrea.
Following these authors, all records of cyanogaster from other than these two countries are regarded herein as representing various other species of the
atricollis complex.
However, the distribution of the many species of this group is unclear (Wagner, Greenbaum, Bauer, Kusamba & Leaché 2018).
Previously included adramitana, annectens, phillipsi, yemenensis (e.g., Wermuth 1967), and the populations now assigned to margaritae.
The type locality is Jeddah (Saudi Arabia), but should be Massawa (Eritrea) (Anderson 1896).
Distribution:
Eritrea,
Ethiopia.
|
|
|
Acanthocercus gregorii
|
Kenyan Ridgeback Agama, (Gregory's Blue-headed Tree Agama)
|
|
Kenianische Keilrückenagame
|
|
Kenyansk Kølrygagam
|
|
1894 | |
Agama gregorii Günther (Wermuth 1967) |
|
| |
Agama atricollis gregorii Klausewitz 1957 |
|
| |
Acanthocercus atricollis gregorii Wagner, Greenbaum & Bauer 2012 |
|
| |
Acanthocercus gregorii Wagner, Greenbaum, Bauer, Kusamba & Leaché 2018 |
|
1957 | |
Agama atricollis loveridgei Klausewitz (Wagner, Greenbaum, Bauer, Kusamba & Leaché 2018) |
|
| |
Acanthocercus atricollis loveridgei Wagner, Greenbaum & Bauer 2012 |
Remarks:
Previously regarded as a subspecies of atricollis (e.g., Klausewitz 1957).
Revalidated as a separate species by Wagner, Greenbaum, Bauer, Kusamba & Leaché (2018).
Distribution:
Burundi,
Ethiopia,
Kenya,
Malawi,
Mozambique,
Rwanda,
Tanzania,
Zambia.
|
|
|
Acanthocercus guentherpetersi
|
Harar Ridgeback Agama, (Peters' Ridgeback Agama)
|
|
Harar-Keilrückenagame
|
|
Harar-kølrygagam
|
|
2006 | |
Acanthocercus guentherpetersi Largen & Spawls |
Distribution:
Eritrea,
Ethiopia.
|
|
|
Acanthocercus kiwuensis
|
Kivu Ridgeback Agama
|
|
Kivu-Keilrückenagame
|
|
Kivu-kølrygagam
|
|
1957 | |
Agama atricollis kiwuensis Klausewitz |
|
| |
Acanthocercus atricollis kiwuensis Wagner, Greenbaum & Bauer 2012 |
|
| |
Acanthocercus kiwuensis Wagner, Greenbaum, Bauer, Kusamba & Leaché 2018 |
Remarks:
Previously regarded as a subspecies of atricollis (e.g., Klausewitz 1957).
Raised to species status by Wagner, Greenbaum, Bauer, Kusamba & Leaché (2018).
Distribution:
Congo-Kinshasa,
Rwanda,
Uganda.
|
|
|
Acanthocercus margaritae
|
Kunene Ridgeback Agama
|
|
Kunene-Keilrückenagame
|
|
Kunene-kølrygagam
|
|
2021 | |
Acanthocercus margaritae Wagner, Butler, Ceríaco & Bauer |
Remarks:
Previously regarded as populations of atricollis (e.g., Bocage 1895; Monard 1931, 1937; Branch 1998),
cyanogaster (e.g., Loveridge 1957),
or cyanocephalus (e.g., Wagner, Greenbaum, Bauer, Kusamba & Leaché 2018; Branch, Vaz Pinto, Baptista & Conradie 2019).
Distribution:
Angola,
Namibia.
|
|
|
Acanthocercus minutus
|
Shewa Ridgeback Agama, Ethiopian Tree Agama
|
|
Shewa-Keilrückenagame
|
|
Shewa-kølrygagam
|
|
1957 | |
Agama atricollis minuta Klausewitz |
|
| |
Acanthocercus atricollis minuta Wagner, Greenbaum & Bauer 2012 |
|
| |
Acanthocercus minutus Wagner, Greenbaum, Bauer, Kusamba & Leaché 2018 |
Remarks:
Previously regarded as a subspecies of atricollis (e.g., Klausewitz 1957).
Raised to species status by Wagner, Greenbaum, Bauer, Kusamba & Leaché (2018).
Distribution:
Ethiopia,
Kenya,
Somalia.
|
|
|
Acanthocercus phillipsii
|
Somaliland Ridgeback Agama, (Phillips' Ridgeback Agama)
|
|
Somalische Keilrückenagame
|
|
Somalisk Kølrygagam
|
|
1895 | |
Agama phillipsii Boulenger |
|
| |
Agama cyanogaster phillipsi Klausewitz 1954 |
|
| |
Stellio phillipsi Lanza 1983 |
|
| |
Acanthocercus phillipsi Baig & Böhme 1997 |
|
1982 | |
Agama trachypleura Peters (Largen & Spawls 2006) |
|
| |
Stellio trachypleurus Ananjeva, Peters, Macey & Papenfuss 1990 |
|
| |
Acanthocercus trachypleurus Baig & Böhme 1997 |
Remarks:
Presence in Eritrea needs verification.
There is a single, but imprecise record from the country (the holotype of Agama trachypleura), but it probably does not occur there (Largen & Spawls 2010; Spawls, Mazuch & Mohammad 2023).
Distribution:
Ethiopia,
Somalia.
|
|
|
Acanthocercus ugandaensis
|
Uganda Ridgeback Agama
|
|
Ugandische Keilrückenagame
|
|
Ugandisk Kølrygagam
|
|
1957 | |
Agama atricollis ugandaensis Klausewitz |
|
| |
Acanthocercus atricollis ugandaensis Wagner, Greenbaum & Bauer 2012 |
|
| |
Acanthocercus ugandaensis Wagner, Greenbaum, Bauer, Kusamba & Leaché 2018 |
Remarks:
Previously regarded as a subspecies of atricollis (e.g., Klausewitz 1957).
Raised to species status by Wagner, Greenbaum, Bauer, Kusamba & Leaché (2018).
Distribution:
Kenya,
Rwanda,
Tanzania,
Uganda.
|
|
|
Acanthocercus yemenensis
|
Yemen Ridgeback Agama, Yemen Agama
|
|
Jemenitische Keilrückenagame
|
|
Yemenitisk Kølrygagam
|
|
1954 | |
Agama cyanogaster yemenensis Klausewitz |
|
| |
Agama yemenensis Peters 1982 |
|
| |
Stellio yemenensis Joger & Arano 1987 |
|
| |
Acanthocercus yemenensis Schätti & Gasparetti 1994 |
Distribution:
Saudi Arabia,
Yemen.
|
|
|