Petrocephalus ansorgii Boulenger holotype (unique) BMNH 1902.10.25.1, Agberi, Lower Niger River Delta, Nigeria

Petrocephalus ansorgii Boulenger holotype (unique) BMNH 1902.10.25.1, Agberi, Lower Niger River Delta, Nigeria. Image from W. Harder's "Mormyridae and other Osteoglossomorpha" CD-ROM published by ETI BioInformatics, Amsterdam.

