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Saw-shelled turtle
The saw-shelled turtle (Myuchelys latisternum) is a species of turtle in the Chelidae family endemic to Australia, ranging along rivers and streams and connected swamps and lagoons from coastal Cape York Peninsula to northern New South Wales, with populations also noted as far south as Newcastle - (Williams River Catchment site of the former Tilligra Dam). They are thought to have been introduced to Lake Eacham in the Atherton Tablelands. Other common English names are: serrated snapping turtle or common sawshell turtle.
The female is considerably larger than the male, with a carapace up to 28 cm long compared to the males which rarely get longer than about 18 cm. The carapace is roughly oval and broad at the rear. They are not usually aggressive, but can bite fiercely. They can also emit a strong smell.
The shell has marginal serrations which are the reason for its common name. It retains some of these serrations throughout its life. "The head shield extends down the side of the head to just above the tympanum, and the top of the neck has prominent pointed tubercules (many of these with an apical sensory pit)."
The carapace is mainly brown to dark brown, commonly with some dark blotches. The plastron (underside) is yellowish. The head is large with a projecting snout and a horny plate on the top. The neck can fold sideways. The feet are webbed and also clawed. Hatchlings have serrated hind legs which become smooth as they mature.
Myuchelys latisternum (Gray, 1867) (common sawshell turtle)
follows that of Gray (1872a) and Boulenger (1889).
The combination Wollumbinia latisternum (Gray, 1867) Wells, 2007, was declared unpublished and hence unavailable for use by Fritz & Havaš 2007.
Myuchelys latisternum reaches sexual maturity at an SCL of 125–135 mm in males and 182–189 mm in females. Courtship behaviors continue throughout the year but mating is observed during mid January. There is no indication of large congregates of nesting sites, but instead, they are seen in ones or twos at dispersed localities along the watercourse. Nest have been seen in soil as far as 100 m from the water. The females nest from September to December. They can have three to four clutches in one season of 9 to 20 eggs which hatch before winter in about 60 days, with the incubation period shortened in southern regions. The eggs are variably described as either "hard-shelled (34 × 22 mm)", or as small and "flexible-shelled". Hatchlings from central Queensland measured 30 x 29 mm SCL x carapace width, while hatchlings from northern New South Wales averaged 32.5 × 22.5 mm.
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Saw-shelled turtle
The saw-shelled turtle (Myuchelys latisternum) is a species of turtle in the Chelidae family endemic to Australia, ranging along rivers and streams and connected swamps and lagoons from coastal Cape York Peninsula to northern New South Wales, with populations also noted as far south as Newcastle - (Williams River Catchment site of the former Tilligra Dam). They are thought to have been introduced to Lake Eacham in the Atherton Tablelands. Other common English names are: serrated snapping turtle or common sawshell turtle.
The female is considerably larger than the male, with a carapace up to 28 cm long compared to the males which rarely get longer than about 18 cm. The carapace is roughly oval and broad at the rear. They are not usually aggressive, but can bite fiercely. They can also emit a strong smell.
The shell has marginal serrations which are the reason for its common name. It retains some of these serrations throughout its life. "The head shield extends down the side of the head to just above the tympanum, and the top of the neck has prominent pointed tubercules (many of these with an apical sensory pit)."
The carapace is mainly brown to dark brown, commonly with some dark blotches. The plastron (underside) is yellowish. The head is large with a projecting snout and a horny plate on the top. The neck can fold sideways. The feet are webbed and also clawed. Hatchlings have serrated hind legs which become smooth as they mature.
Myuchelys latisternum (Gray, 1867) (common sawshell turtle)
follows that of Gray (1872a) and Boulenger (1889).
The combination Wollumbinia latisternum (Gray, 1867) Wells, 2007, was declared unpublished and hence unavailable for use by Fritz & Havaš 2007.
Myuchelys latisternum reaches sexual maturity at an SCL of 125–135 mm in males and 182–189 mm in females. Courtship behaviors continue throughout the year but mating is observed during mid January. There is no indication of large congregates of nesting sites, but instead, they are seen in ones or twos at dispersed localities along the watercourse. Nest have been seen in soil as far as 100 m from the water. The females nest from September to December. They can have three to four clutches in one season of 9 to 20 eggs which hatch before winter in about 60 days, with the incubation period shortened in southern regions. The eggs are variably described as either "hard-shelled (34 × 22 mm)", or as small and "flexible-shelled". Hatchlings from central Queensland measured 30 x 29 mm SCL x carapace width, while hatchlings from northern New South Wales averaged 32.5 × 22.5 mm.