In order to identify the position of the NORs in the genome of M. segmentaria, impregnation with silver nitrate was performed (Fig. 3). However, the methodology
used was not efficient enough to indicate the location of the NOR. A particular pattern found in the chromosomes of M. segmentaria was a result of silver staining of the heterochromatic chromosomal arms. Overall, NORs were associated with the GC-rich regions, as observed in the bee genus Friesella Moure, 1946