Tropidonophis mcdowelli, the northern New Guinea keelback, is a species of colubrid snake.

[1][2] Its specific name honors Samuel B. McDowell, American herpetologist (1928–2014).

[2] Tropidonophis mcdowelli occurs in lowland and montane rainforest at elevations of 579–1,885 m (1,900–6,184 ft) above sea level in association with watercourses.

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