|Australian snake-necked turtle|
Fitzinger, 1826 
|Testudo longicollis Shaw, 1794|
Chelodina, collectively known as snake-necked turtles, is a large and diverse genus of long-necked chelid turtles with a complicated nomenclatural history. Although in the past, Macrochelodina and Macrodiremys have been considered separate genera and prior to that all the same, they are now considered subgenera of the Chelodina, further Macrochelodina and Macrodiremys are now known to apply to the same species, hence Chelydera is used for the northern snake-necked turtles.
Chelodina is an ancient group of chelid turtles native to Australia, New Guinea, the Indonesian Rote Island, and East Timor. The turtles within this subgenus are small to medium-sized with oval shaped carapace. They are side-necked turtles, meaning they tuck their head partially around the side of their body when threatened instead of directly backwards.
Chelydera represents those species that have often been termed the Chelodina B group or thick necked snake neck turtles. The subgenus was described in 2020 by Thomson & Georges (in Shea et al. 2020). They are a side-neck turtle of the family Chelidae with extremely long necks and long flattened heads. They are specialist fish eaters using a strike and gape mode of feeding. They are medium to large species with the largest Chelodina (Chelydera) expansa reaching shell lengths of some 45 cm (18 in). The first fossils (C. (Chelydera) alanrixi) are known from Queensland from the Eocene period (Lapparent de Broin, F. de, & Molnar, R. E., 2001).
Macrochelodina (Wells & Wellington, 1985) is a monotypic subgenus of the Chelodina. Its sole member is the enigmatic Chelodina (Macrochelodina) oblonga from Western Australia.
Current taxonomy follows that of Georges & Thomson, 2010 with updates from van Dijk et al. 2014 and Shea et al. 2020.
Synonymous names for the Chelodina Fitzinger 1826 genus include: Hydraspis Bell 1828, Chelyodina Agassiz 1846:79 (nomen novum), Hesperochelodina Wells and Wellington 1985 (nomen nudum).
The type species for the Chelodina subgenus is Chelodina longicollis (Shaw, 1794). The type species for the Chelydera subgenus is Chelodina parkeri Rhodin and Mittermeier 1976. The type species for Macrochelodina is Chelodina oblonga Gray 1841.
|Common name||Scientific name[a]||IUCN Red List Status||Picture|
|Subgenus: Chelodina Fitzinger, 1826|
|Cann's snake-necked turtle||Chelodina canni
McCord & Thomson, 2002
|Gunalen's snake-necked turtle||Chelodina gunaleni
McCord & Joseph-Ouni, 2007
|Eastern long-necked turtle||Chelodina longicollis
|Roti Island snake-necked turtle
McCord's snakeneck turtle
|New Guinea snake-necked turtle||Chelodina novaeguineae
|Reimann's snake-necked turtle||Chelodina reimanni
Philippen and Grossmann, 1990
|Pritchard's snake-necked turtle||Chelodina pritchardi
|Steindachner's long-necked turtle
|Subgenus: Chelydera Thomson & Georges, 2020|
|Arnhem Land long-necked turtle||Chelodina burrungandjii
Thomson, Kennett & Georges, 2000
|Giant snake-necked turtle||Chelodina expansa
|Kuchling's snake-necked turtle||Chelodina kuchlingi
|Darwin snake-necked turtle||Chelodina kurrichalpongo
(Joseph-Ouni, McCord, Cann, & Smales, 2019)
|Parker's snake-necked turtle||Chelodina parkeri
Rhodin and Mittermeier, 1976
|Northern snake-necked turtle
North Australian snake-necked turtle
|Kimberley long neck turtle||Chelodina walloyarrina||NE|
|Subgenus: Macrochelodina Wells & Wellington 1985|
|Southwestern snake-necked turtle
Narrow-breasted snake-necked turtle
There are three identified extinct species of Chelodina: