sentences:  The genus "Hemiandrus" has the smallest sized weta, in terms of body size, with individuals ranging from 12-45 millimetres, and weighing 1-3 grams.These weta have no tympanum, and instead are able to detect sound through their cuticle, which is adaptive for their underground lifestyle.Some species in this genus have unusually short ovipositors for being Orthopterans, the species with this morphological trait exhibit maternal care, which is uncommon as it occurs only in five families within the Orthoptera order.