Petrocephalus steindachneri Fowler, 1958

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 : 2246-2247

publication ID	https://doi.org/ 10.1080/00222933.2012.708452
DOI	https://doi.org/10.5281/zenodo.4590451
persistent identifier	https://treatment.plazi.org/id/038087B4-FFA5-FFD6-A36E-FBA761953039
treatment provided by	Carolina
scientific name	Petrocephalus steindachneri Fowler, 1958
status

Treatment

Petrocephalus steindachneri Fowler, 1958 View in CoL (resurrected species)

( Figure 2, no. 25)

Petrocephalus steindachneri Fowler, 1958: 8 View in CoL ; nomen novum for Petrocephalus affinis View in CoL sp. nov.? Steindachner, 1914: 536–537, more fully described by Steindachner 1916: 62–63, which is preoccupied by Mormyrus (Petrocephalus) affinis Sauvage, 1879 View in CoL . Synonym of Petrocephalus catostoma ( Günther 1866) View in CoL : Seegers 1996:82.

Type specimens. Syntypes: NMW 55.118 View Materials :1–3 (3), NMW 55117(1) , studied.

Type locality. Msola Brook , near Kiperege , Ulanga River system, Rufiji basin, Tanzania .

Diagnosis (n = 3). Predorsal length, PDL, mean 0.632 (range 0.623 –0.641) of SL; preanal length, PAL, mean 0.609 (range 0.601 –0.616) of SL; dorsal fin length, LD, mean 0.193 (range 0.173 –0.206) of SL; anal fin length, LA, mean 0.238 (range 0.222 –0.252) of SL; distance dorsal fin origin to end of caudal peduncle, pD, mean 0.42 (range 0.402 –0.432) of SL; length of caudal peduncle, CPL, mean 0.204 (range 0.195 –0.211) of SL; depth of caudal peduncle, CPD, mean 0.3 (range 0.285 –0.313) of CPL; length of snout to centre of eye, LSc, mean 0.322 (range 0.311 –0.343) of HL; length of snout to posterior orbital rim of eye, LSo, mean 0.436 (range 0.434 –0.438) of HL; head length, HL, mean 0.273 (range 0.272 –0.274) of SL; distance between the pair of nares of one side, Na, mean 26.25 (range 21–30) times in HL, head length; body depth, BD, mean 0.308 (range 0.294 –0.328) of SL; dorsal fin ray number, nD, median 24.5 (range 22–27); anal fin ray number, nA, median 30 (range 26–31) GoogleMaps .

Remarks. The most useful characters to distinguish P. steindachneri from other Petrocephalus , especially eastern and northern ones, are: dorsal fin ray number (nD) and length of dorsal fin (LD / SL) high, long head (HL / SL), slender caudal peduncle ( CPD / CPL low).