A key to the Glaphyromorphus nigricaudis group of north-eastern Australia

Group defined as having: adpressed limbs overlapping or separated by at most the length of forelimb, 24 or more midbody scale rows, and prefrontal not contacting first preocular scale.

1. Body size small (SVL ~ 50 mm); dark barred pattern on dorsal and lateral surfaces of the body, extending posteriorly to groin; supralabials predominantly dark............................................................... nyanchupinta

- Body size large (SVL ~ 70–90 mm); dark barred pattern not extending to groin; supralabials predominantly pale with dark sutures.............................................................................................. 2

2. Eight supralabial scales with 6 th below centre of eye, and more than 14 subdigital lamellae beneath 4 th finger...... othelarrni

- Seven supralabial scales with 5 th below centre of eye, and less than 14 subdigital lamellae beneath 4 th finger.............. 3

3. 59–70 paravertebral scale rows; a series of pale or yellowish dorsolateral blotches present on shoulders......... fuscicaudis

- 51–58 paravertebral scale rows; no series of yellowish dorsolateral blotches on shoulders................... nigricaudis