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
Photographer: Wilhelm HarderRights holder: ETI BioInformatics / Wilhelm Harder

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.