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No image available for this species; drawing shows typical species in Mormyridae.
分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
> Osteoglossiformes (Bony tongues) > Mormyridae (Elephantfishes)
Etymology: Petrocephalus:Latin, petra = stone + Greek, kephale = head (Ref. 45335); degeni:Named after its collector, Mr. E. Degen (Ref. 1568, 91771). Eponymy: Edward J E Degen (1852–1922) was a Swiss naturalist and ornithologist who lived and worked in Australia, Africa and England; he died in London. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / 深さの範囲 / distribution range 生態学
背面の脊椎 (合計) : 0; 背鰭 (合計) : 19; 肛門の骨: 0; 臀鰭: 27. It is distinguished from its congeners in the short dorsal fin originating above the first ray of the anal (Ref. 1568). Preanal length 64.1% of standard length; snout very short, the distance from the tip of the snout to the centre of the eye is 25.8% of head length (Ref. 1568, 91771). Width of mouth about 25% of head length (Ref. 1568). Teeth biscuspid, 10 in upper jaw and 22 in lower jaw (Ref. 1568). Body shape (shape guide): fusiform / normal.
Forms shoals and frequents sandy or gravelly bottoms on lake shore; feeds on algae, plankton and small underwater insects (Ref. 36900).
Life cycle and mating behavior 成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Kramer, B., R. Bills, P. Skelton and M. Wink, 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):2179-2258. (Ref. 91771)
Phylogenetic diversity index (参照 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01549 (0.00684 - 0.03506), b=2.86 (2.68 - 3.04), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
栄養段階 (参照 69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100). 🛈
