Eastern long-necked turtle

Eastern long-necked turtle
Conservation status
Least Concern  (IUCN 2.3)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Sauropsida
Order:	Chelonia
Suborder:	Pleurodira
Family:	Chelidae
Subfamily:	Chelodininae
Genus:	Chelodina
Subgenus:	Chelodina
Species:	C. (C.) longicollis
Binomial name
Chelodina longicollis Shaw, 1794[2]
Synonyms[1]
Testudo longicollis Shaw, 1794[2] Chelodina novaehollandiae Duméril & Bibron, 1835[3] Chelodina sulcata Gray, 1856[4] Chelodina sulcifera Gray, 1856[5]

The eastern long-necked turtle (Chelodina longicollis)^[6][7] is an east Australian species of snake-necked turtle that inhabits a wide variety of water bodies and is an opportunistic feeder.^[7] It is a side-necked turtle (Pleurodire), meaning that it bends its head sideways into its shell rather than pulling it directly back.

Distribution

The species is found throughout south eastern Australia where it is found west of Adelaide (South Australia) eastwards throughout Victoria and New South Wales, and northwards to the Fitzroy River of Queensland. Where the species comes in contact with Chelodina canni they freely hybridise exhibiting hybrid vigor in the Styx River Drainage of Queensland.^[7][8]

Description

The carapace is generally black in color though some may be brown, it is broad and flattened with a deep medial groove. The scutes are edged in black in those individuals with a lighter background color.^[7] The plastron is also very broad and is cream to yellow in color with sutures edged in black.^[7] The neck is long and narrow, typical of the subgenus Chelodina, and reaches a length of approximately 60% of the carapace length. The neck has numerous small pointed tubercles and is grey to black in color dorsally, cream below, as is the narrow head.^[7] Females tend to grow to larger sizes and have deeper bodies. The maximum sizes recorded for females and males varies throughout the range, in river environments of the Murray it is 28.2 cm (11.1 in) and 24.9 cm (9.8 in) respectively, whereas in the Latrobe Valley it is 21.6 cm (8.5 in) and 18.8 cm (7.4 in) respectively.^[7] It is thought this is linked to productivity of the local environment.^[7]

When it feels threatened, this turtle will emit an offensive smelling fluid from its musk glands. This trait gives the turtle one of its other common names, "stinker".^[9]

The eastern long-necked turtle is carnivorous, eating a variety of animals. This includes insects, worms, tadpoles, frogs, small fish, crustaceans, and molluscs.

Reproduction

In early summer, the female will lay between 2 and 10 eggs in the banks of her aquatic habitat. Three to five months later the hatchlings break out of their shells. These young turtles often fall prey to predators such as fish and birds. Females will lay 1 to 3 clutches of eggs per year.

Gallery

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  At the Washington National Zoo

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  Neck bent back into its shell

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  In an aquarium

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  Covered in algae, Victoria, Australia.

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  Peering from its shell, Carnarvon National Park, Queensland, Australia.

References

1. Turtle Taxonomy Working Group [van Dijk, P.P., Iverson, J.B., Rhodin, A.G.J., Shaffer, H.B., and Bour, R.]. 2014. "Turtles of the world, 7th edition: annotated checklist of taxonomy, synonymy, distribution with maps, and conservation status". In: Rhodin, A.G.J., Pritchard, P.C.H., van Dijk, P.P., Saumure, R.A., Buhlmann, K.A., Iverson, J.B., and Mittermeier, R.A. (Eds.). Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group. Chelonian Research Monographs 5(7):000.329–479 doi:10.3854/crm.5.000.checklist.v7.2014
2. Shaw, G. (1794) Zoology of New Holland. Vol 1. Davis, London.
3. Duméril, André Marie Constant and Bibron, Gabriel (1835) Erpétologie Générale ou Histoire Naturelle Complète des Reptiles. Vol. 2. Paris: Roret.
4. Gray, John Edward. (1856). On some new species of freshwater tortoises from North America, Ceylon and Australia, in the collection of the British Museum. Proceedings of the Zoological Society of London 1855 (23):197–202. [Published Feb 1856].
5. Gray, John Edward. (1856). Catalogue of Shield Reptiles in the Collection of the British Museum. Part I. Testudinata (Tortoises). London: British Museum, [Published Mar 1856].
6. Kennett, R; Georges, A. (1990). "Habitat utilization and its relationship to growth and reproduction of the eastern long-necked turtle, Chelodina longicollis (Testudinata: Chelidae), from Australia". Herpetologica 46 (1): 22–33. JSTOR 3892599.
7. Kennett, R., Roe, J., Hodges, K., and Georges, A. 2009. Chelodina longicollis (Shaw 1784) – eastern long-necked turtle, common long-necked turtle, common snake-necked turtle. In: Rhodin, A.G.J., Pritchard, P.C.H., van Dijk, P.P., Saumure, R.A., Buhlmann, K.A., Iverson, J.B., and Mittermeier, R.A. (Eds.). Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group. Chelonian Research Monographs No. 5, pp. 031.1–031.8, doi:10.3854/crm.5.031.longicollis.v1.2009
8. McCord, William P.; Thomson, Scott A. (2002). "A new species of Chelodina (Testudines: Pleurodira: Chelidae) from northern Australia". Journal of Herpetology 36 (2): 255–267. doi:10.7717/peerj.170. JSTOR 1565998.
9. Eisner, T.; Jones, T.H.; Meinwald, J.; Legler, J.M. (1978). "Chemical composition of the odorous secretion of the Australian turtle, Chelodina longicollis". Copeia 1978: 714–715. doi:10.2307/1443705.