The species is endemic to the island of New Guinea.

[1][2] The preferred natural habitat of L. brongersmai is forest, at altitudes of 1,000–1,500 m (3,300–4,900 ft).

[1] The specific name, brongersmai, is in honor of Dutch herpetologist Leo Brongersma.

[3] L. brongersmai may attain a snout-to-vent length (SVL) of 5.9 cm (2.3 in).

[2] The mode of reproduction of L. brongersmai is unknown.