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Kinixys

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Genus of tortoises

Kinixys
Kinixys nogueyi
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Superfamily: Testudinoidea
Family: Testudinidae
Genus: Kinixys
Bell, 1827

Kinixys is a genus of turtles in the family Testudinidae. The genus was erected by Thomas Bell in 1827. The species in the genus Kinixys are native to Sub-Saharan Africa and Madagascar and commonly known as hinged tortoises or hinge-back tortoises.

Most of the Kinixys species are omnivores. They feed mainly on a wide range of different leaves, weeds, roots, flowers and fruits. However, they also eat worms, insects and other small invertebrates.

Species

The following species are recognised in the genus Kinixys:

Three species of Kinixys: K. nogueyi, K. erosa, K. homeana. (Illustration G. Aeschimann).
Image Species Common name
Kinixys belliana

(Gray, 1830)

Bell's hinge-back tortoise
Kinixys erosa

(Schweigger, 1812)

forest hinge-back tortoise
Kinixys homeana

Bell, 1827

Home's hinge-back tortoise
Kinixys lobatsiana

(Power, 1927)

Lobatse hinge-back tortoise
Kinixys natalensis

Hewitt, 1935

Natal hinge-back tortoise
Kinixys nogueyi

Hewitt, 1935

Western hinge-back tortoise
Kinixys spekii

Gray, 1863

Speke's hinge-back tortoise
Kinixys zombensis

Hewitt, 1931

Eastern hinge-back tortoise

Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Kinixys.

Distribution and habitat

The several species of the genus Kinxys are found across much of tropical and sub-tropical sub-Saharan Africa, ranging as far south as KwaZulu-Natal in South Africa, and as far north as the fringes of the Sahel and Sahara. However, individuals are often very scarce within this range, and several species are threatened.

Though the species' wide geographic ranges overlap considerably, they are separated from each other by favouring different habitats within this range. Some species (such as K. belliana) favour open savannah or grasslands, others (such as K. homeana) favour rainforest.

Parasites

Species of tortoises in the genus Kinixys play host to a number of ectoparasites (external) and endoparasites (internal). A survey (by Alan Probert & Clive Humphreys) of mixed captive K. spekii and K. belliana (mostly K. spekii) in Zimbabwe showed that the following parasites were known to infest/infect this species. This had been observed and published by others too. However some of the tiny roundworms (photographed under scanning electron microscope) are very likely new species and as yet remain undescribed.

  • Ticks (Arachnida)
  • Roundworms (Nematoda) – Angusticium, Atractis and Tachygontria

References

  1. ^ Kinixys at the Reptarium.cz Reptile Database. Accessed 30 September 2022.
  2. ^ Kindler, Carolin; Branch, William R.; Hofmeyr, Margaretha D.; Maran, Jérôme; Široký, Pavel; Vences, Miguel; Harvey, James; Hauswaldt, J. Susanne; Schleicher, Alfred; Stuckas, Heiko & Fritz, Uwe (2012). "Molecular phylogeny of African hinge-back tortoises (Kinixys): implications for phylogeography and taxonomy (Testudines: Testudinidae): Molecular phylogeny of hinge-back tortoises". Journal of Zoological Systematics and Evolutionary Research. 50 (3): 192–201. doi:10.1111/j.1439-0469.2012.00660.x.
  3. Branch, Bill (2012). Tortoises, Terrapins & Turtles of Africa. Penguin Random House South Africa.
  4. Kirkpatrick, D. (1998). "African Hingeback Tortoises of the Genus Kinixys". Reptile & Amphibian Magazine. 54: 32-37. Archived 2012-10-21 at the Wayback Machine
  5. "The Hinge-Back Tortoises". britishcheloniagroup.org.uk.
  6. "Natural History and Care of Bell's Hinged Tortoise". kingsnake.com.

Further reading

  • Bell, T. (1827). "On two new Genera of Land Tortoises". The Transactions of the Linnean Society of London. 15: 392–401. (Kinixys, new genus, p. 398). (in English and Latin).
Tortoise family
Genera
Species of the tortoise family
Agrionemys
Aldabrachelys
Astrochelys
Centrochelys
Chelonoidis
Galápagos tortoise
Chelonoidis complex
Cheirogaster
Chersina
Chersobius
Cylindraspis
Geochelone
Gopherus
Hadrianus
Hesperotestudo
Homopus
Indotestudo
Kinixys
Malacochersus
Manouria
Megalochelys
Psammobates
Pyxis
Stigmochelys
Stylemys
Testudo
Phylogenetic arrangement of turtles based on turtles of the world 2017 update: Annotated checklist and atlas of taxonomy, synonymy, distribution, and conservation status. Key: †=extinct.
Testudines
Suborder
Superfamily
Family
Genus
Cryptodira
Chelonioidea
(Sea turtles)
Cheloniidae
Dermochelyidae
 
Kinosternoidea
Dermatemydidae
Kinosternidae
Testudinoidea
Emydidae
Geoemydidae
 Platysternidae
Testudinidae
Trionychia
Carettochelyidae
Trionychidae
 
 
Chelydridae
Nanhsiungchelyidae
Protostegidae
 
Pleurodira
 
Araripemydidae
Bothremydidae
Chelidae
Pelomedusidae
Podocnemididae
Sahonachelyidae
 
 
 
Taxon identifiers
Kinixys
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