| Bellinger River snapping turtle | |
|---|---|
 | |
Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Testudines |
| Suborder: | Pleurodira |
| Family: | Chelidae |
| Genus: | Myuchelys |
| Species: | M. georgesi |
| Binomial name | |
| Myuchelys georgesi | |
| Synonyms[3][1][4][5] | |
| |
TheBellinger River turtle (Myuchelys georgesi), orBellinger River saw-shelled turtle, is aspecies ofturtle in thefamilyChelidae. The species is of moderate size, with a straight-line carapace length to 240 mm (9.4 in) in females, and 185 mm (7.3 in) in males. It isendemic toAustralia with a highly restricted distribution to the small coastal drainage of theBellinger River inNew South Wales.[3]
In the past the species was considered locally abundant. The species' preferredhabitat is the deeper pools of the clear-water upstream reaches of the river, where water flows continuously in most months over a bedrock basement and a stream bed of boulders, pebbles, and gravel.[6] A captive breeding program has been under way since a 2015 virus outbreak came close to wiping out the entire species. Most remaining individuals are currently housed in quarantine, though a small number have been reintroduced to the original habitat.[7]
Thespecific name,georgesi, is in honour ofAustralianherpetologist Arthur Georges.[8]
M. georgesi is found in theBellinger River and its tributaries, mid-easternNew South Wales, Australia.[3]
The preferredhabitat ofM. georgesi is the deeper pools of the clear-water upstream reaches of the river, where the water flows continuously in most months over a bedrock basement and a boulder, pebble and gravel bed.[9] The species takes advantage of the highly oxygenated water with low particulate load by supplementing its oxygen uptake throughcloacal breathing.[10]
M. georgesi is essentially an omnivore, with tendencies leaning toward carnivory.[11] A high proportion of its food comes frombenthic macro-invertebrate communities that are relatively sedentary and live in immediate association with the substratum, but with some terrestrial fruit and aquatic vegetation eaten.
M. georgesi nests from October to December, laying 10-15 oblong white hard-shelled eggs.[9]
Within the Bellinger drainage, a very restricted range,M. georgesi was formerly widely distributed and locally abundant, with threats to its persistence including habitat modification and loss of native riparian vegetation, associated turbidification and sedimentation, predation by the introduced European fox, and competition with the recently introduced turtleEmydura macquarii.[12]
In 2015, more than 90% of the adult population was wiped out by a virus, rendering the animal functionally extinct in the wild; a captive breeding program, with limited reintroduction, is working to re-establish a healthy population.[7] Partially as a result of the extreme population decline caused by the virus (with a 97% mortality rate), the species was listed ascritically endangered by the New South WalesDepartment of Planning and Environment in 2016.[13] As of November 2022, while there is still no cure for the virus, the captive breeding program undertaken byTaronga Zoo andSymbio Wildlife Park has resulted in the release of 82 juvenile turtles back into the wild.[14]
Media related toMyuchelys georgesi at Wikimedia Commons