Petrocephalus stuhlmanni Boulenger, 1909

Kramer, Bernd, Bills, Roger, Skelton, Paul & Wink, Michael, 2012, 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, Journal of Natural History 46 (35 - 36), pp. 2179-2258 : 2247

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).