A critical revision of the churchill snoutfish, genus Petrocephalus Marcusen, 1854 (Actinopterygii: Teleostei: Mormyridae), from southern and eastern Africa, with the recognition of Petrocephalus tanensis, and the description of five new species Author Kramer, Bernd Author Bills, Roger Author Skelton, Paul Author Wink, Michael text Journal of Natural History 2012 2012-09-30 46 35 - 36 2179 2258 http://dx.doi.org/10.1080/00222933.2012.708452 journal article 10.1080/00222933.2012.708452 1464-5262 4590828 Petrocephalus stuhlmanni Boulenger, 1909 (resurrected species) ( Figure 2 , no. 2) Petrocephalus stuhlmanni Boulenger, 1909: 56 . Whitehead and Greenwood 1959: 286 (synonymy with Petrocephalus catostoma catostoma ). Type specimens. Holotype (unique): BMNH 1907.12 .3.1 (studied). Type locality. Kingani River , Tanzania . Diagnosis. Dorsal fin length, LD 0.152 of SL; length of snout to posterior orbital rim of eye, LSo 0.382 of HL; number of scales around caudal peduncle, SPc 12; distance between the pair of nares of one side, Na 25.8 times in HL, head length; depth of caudal peduncle, CPD 0.389 of CPL , caudal peduncle length; body depth, BD 0.301 of SL; predorsal length, PDL 0.643 of SL; preanal length, PAL 0.596 of SL; anal fin length, LA 0.239 of SL; distance dorsal fin origin to end of caudal peduncle, pD 0.398 of SL; length of snout to centre of eye, LSc 0.288 of HL; head length, HL 0.276 of SL; dorsal fin ray number, nD, range 1 20–22, range 2 19–21 ( n = 9); anal fin ray number, nA, range 1 25–29, range 2 25–29 ( n = 9); number of lateral line scales, SLS, range 1 35–38 (range 1 : Boulenger 1909: 56–57 , with n unknown; range 2 : Whitehead and Greenwood 1959: 294 ). Remarks. Petrocephalus . stuhlmanni is distinguished from all other Petrocephalus by the combination of a very short dorsal fin (LD / SL) that originates well behind the anal fin, a very low snout length (LSo / HL) and a great head length (HL / SL). “Head slightly longer than deep; with convex upper profile” ( Boulenger 1909: 56 ).