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Chelodina longicollis (SHAW, 1794)

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Higher TaxaChelidae, Chelodininae, Pleurodira, Testudines (turtles)
Common NamesE: Common Snake-necked Turtle
G: Glattrücken-Schlangenhalsschildkröte 
SynonymTestudo longicollis SHAW 1794: 19
Emys longicollis
Chelodina longicollis — GRAY 1831
Chelodina novae-hollandiae DUMÉRIL & BIBRON 1835: 443 (nomen subst.)
Chelodina longicollis — BELL 1836-1842
Chelodina sulcifera GRAY 1855
Chelodina sulcata GRAY 1856: 267
Chelodina longicollis — GRAY 1857: 486
Chelodina longicollis — BOULENGER 1889
Chelodina longicollis — SIEBENROCK 1905
Chelodina longicollis — COGGER 2000: 190
Chelodina longicollis — GEORGES & THOMSON 2010
Chelodina (Chelodina) longicollis — TTWG 2014
Chelodina (Chelodina) longicollis — SHEA et al. 2020
Chelodina longicollis — TTWG 2021 
DistributionAustralia (New South Wales, Queensland, South Australia, Victoria)

Type locality: New Holland (= Australia), by implication.  
Reproductionoviparous. FRITZ & BAUR (1995) report vital hybrids between Emydura subglobosa and Chelodina longicollis. 
TypesHolotype: BMNH 1947.3.5.86. Holotype presumed to be that specimen on which Shaw based a subsequent description of this species (Shaw 1802), fide Cogger, 1983: 61 and King et al. 1989, but P. Campbell / BMNH catalogue says the specimen is the type of [sulcifera] 
DiagnosisDiagnosis (genus): Medium to large freshwater turtles with exceptionally long necks; head and neck, when extended, typically of similar length to, or longer than, the carapace; gular scutes meet in front of intergular scute, or if not, barely separated by intergular (common variant in C. burrungandjii); skull anteriorly elongated; frontal bones fused into a single unit; parietal arch absent; atlas elements (intercentrum, centrum, lamina) fused into a single unit;
four claws on front and back feet (from Shea et a. 2020).

Diagnosis (subgenus Chelodina): Medium sized semi-aquatic turtles; length of head and neck equal to, or slightly less than, length of carapace; dorsum of neck with many blunt conical tubercles. Carapace oblong to oval, often flattened dorsoventrally when compared to other subgenera, often with reticulated ornamentation of scutes. Plastron broad, flaring anteriorly at pectoral scutes and posteriorly at femoral scutes; covers or almost covers anterior orifice of shell in ventral view. Intergular scute posteriorly tapered; length approximately twice that of suture between pectoral scutes. Dentary bones enlarged with a larger triturating surface area than in other subgenera; no dorsoventral flattening of skull. Atlas (C1) not elongated substantially; moderate elongation of cervical vertebrae 2–4 (centra about twice as long as wide). Transverse processes of cervical vertebrae thin and bladelike. Ilium in contact with 8th pleural only, from anterior to posterior internal surface. Hyolaryngeal complex modified; some elongation of corpus hyoideum, though cornubranchiale only slightly enlarged and cylindrical in cross section, epibranchials cartilaginous throughout life. Anterior bridge struts small; suture with pleurals does not significantly encroach upon pleural 1; posterior bridge strut small, barely contacts pleurals. Exposed neural bones typically absent (occasional single exposed neurals in large adults). Fluid with a pungent odour secreted from ducts in the inguinal and axillary pockets when distressed (from Shea et a. 2020). 
CommentSynonymy mostly after Cogger 1983 and GEORGES & THOMSON 2010.

Type species: Testudo longicollis SHAW 1794 is the type species of the genus Chelodina FITZINGER 1826.

Habitat: freshwater (rivers, swamps) 
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  • Artner, H. G. 1999. Nomenklatur aktuell: Gattung Chelodina. Emys 6 (1): 18–19
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  • Eisner, T., T.H. Jones, J. Meinwald & J.M. Legler 1978. Chemical Composition of the Odorous Secretion of the Australian Turtle, Chelodina longicollis Copeia 1978 (4): 714-715. - get paper here
  • Ernst,C.H. and Barbour,R.W. 1989. Turtles of the World. Smithsonian Institution Press, Washington D.C. - London
  • Ezaz, Tariq; Nicole Valenzuela, Frank Grützner, Ikuo Miura, Arthur Georges, Russell L. Burke & Jennifer A. Marshall Graves 2006. An XX/XY sex microchromosome system in a freshwater turtle, Chelodina longicollis (Testudines: Chelidae) with genetic sex determination. Chromosome Research 14:139–150 - get paper here
  • Ferronato, Bruno O.; Marques, Thiago S.; Lara, Neliton R.F.; Martinelli, Luiz A.; Verdade, Luciano M.; Camargo, Plinio B.; Roe, John H.; Georges, Arthur 2016. Isotopic niche in the eastern long-necked turtle, Chelodina longicollis (Testudines: Chelidae), along a natural-urban gradient in southeastern Australia. The Herpetological Journal 26 (4): 297-304 - get paper here
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  • Georges, A. & Thomson, S. 2010. Diversity of Australasian freshwater turtles, with an annotated synonymy and keys to species. Zootaxa 2496: 1–37 - get paper here
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  • Gray, J.E. 1856. On some new species freshwater tortoises from North America, Ceylon and Australia, in the collection of the British Museum. Proc. Zool. Soc. London 1855: 197-202 - get paper here
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  • Kaminski, Thmas H. and Andreas S. Hennig. 2013. Brief note on the find of a Common Snake-necked Turtle, Chelodina longicollis (Shaw, 1794) in the Australian state of New South Wales. Radiata 22 (4): 31-32
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  • Kennett, R.M. & A. Georges 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. - get paper here
  • Kennett, Rod; John Roe, Kate hodges, and aRthuR geoRges 2009. Chelodina longicollis (Shaw 1794) – Eastern Long-Necked Turtle, Common Long-Necked Turtle, Common Snake-Necked Turtle. Chelonian Research Monographs (ISSN 1088-7105) No. 5: 31.1-31.8 - get paper here
  • McCord, W. P. & S. A. Thomson 2002. A new species of Chelodina (Testudines: Pleurodira: Chelidae) from Northern Australia. Journal of Herpetology 36 (2): 255-267. - get paper here
  • McCord, W.P. & Joseph-Ouni, M. 2004. Chelonian Illustrations #12: Snake-necked and monotypic side-necked turtles of Indo-Australasia. Reptilia (GB) (32): 66-69 - get paper here
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  • Michael, D.R.; D.B. Lindenmayer; M. Crane; C. MacGregor; R. Montague-Drake; L. McBurney. 2011. Reptilia, Murray catchment, New South Wales, southeastern Australia. Check List 7 (1):25-29 - get paper here
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