The local distribution of Neoplatymops is restricted to areas containing rocky outcrops, where it roosts, close to the ground, in narrow horizontal crevices beneath granitic exfoliations. In this regard, it is convergent with the Old World Platymops and Sauromys. Its morphology suggests that it is capable of maneuverable flight and the utilization of both soft and hard-bodied prey. Stomach contents of specimens show a wide variety of small insects, with beetles being most common. Three or four individuals sometimes roost under the same granitic exfoliation.
Females are monotocous and seasonally monestrous.
In eastern Brazil pregnancies have been found initially in August, during the middle of the dry season. Synchronized births occur there in November and December, during the transition from the dry to the wet season, and lactation persists through the wet season from December to April.