The specific epithet rhodogaster (“red-bellied”) refers to body colouration.

[2] The snake grows to an average of about 40 cm in length.

The upper body is brown to grey, with a darker head and a yellow to orange band over the nape.

[2] The species is viviparous, with an average litter size of five.

[2] The species’ distribution is limited to south-eastern New South Wales.