Metaterga 4–19 with one row of 2+2 posterior spines (anterior row absent). Similar in this respect to N. ... [details]
Metaterga 2–8 with two rows of spines (1+1 or 2+2 spines in anterior row, 2+2 spines in posterior row). Similar ... [details]
Metaterga 4–19 with one row of 2+2 posterior spines (anterior row absent). Similar in this respect to N. ... [details]
Metaterga 2–8 with two rows of spines (1+1 or 2+2 spines in anterior row, 2+2 spines in posterior row). Similar ... [details]