Distribution of Montenegrina nana and M. perstriata. A M. nana gracilis and M. nana barinai ssp. n. (circle); M. nana nana (diamond); M. perstriata diminuta (square); M. perstriata mavrovoensis (empty circle with dot); M. perstriata occidentalis (empty triangle); M. perstriata perstriata (empty inverted triangle); M. perstriata plenostoma (inverted triangle); M. perstriata subcristatula (triangle) B M. perstriata callistoma (empty triangle); M. perstriata drimica (circle); M. perstriata ochridensis (square); M. perstriata radikae (empty circle); M. perstriata tenebrosa (star); M. perstriata steffeki is not shown.