Metaterga 4–19 with one row of 2+2 posterior spines (anterior row absent). Similar in this respect to N. acantherpestes but differs from this species by having paraterga longer; degree of elevation of paraterga higher; sternal lobe between male coxae 4 incompletely bilobed; lamina lateralis long, lamella-like, thin, slender, tip round and directed ventrad.