The lindensis -group

Members of this group share a ventral armature between the penis and the bilobed S9, either a large hollow spinelike cone or an armature composed of patches of slender spines. On the everted genitalia, these structures stand perpendicular to the penis, tip (or tips, respectively) pointing cephalad.

In the known females the front ends of the rods of S8 are connected by a wide flat ring (e.g., Fig. 15). The complex prehensor is composed of large sclerotized areas, often including pocket- or sleeve-like structures, and on the opposite side of the oviduct of a sclerite loop armed with spines (e.g., Figs. 15, 16). There may also be teeth and spines.

The larvae of N. lindensis and its close relatives differ from similar small taxa by a long narrow extension of the last tergite and form a group of their own (Watts 2014).