comparison of mouth of Cyphomyrus wilverthi (left) with that of C. psittacus (right)

Comparison of mouth of Cyphomyrus wilverthi (left) with that of C. psittacus (right). Specimens from Wagenia (= Boyoma, Stanley) Falls, Kisangani, D.R. Congo. Note larger relative size of mouth and medial notch in upper lip of C. wilverthi, absent in C. psittacus.

. Photographer: Sullivan, John P.. Publisher: Sullivan, John P..