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Osteoglossiformes (Bony tongues) >
Mormyridae (Elephantfishes)
Etymology: Petrocephalus: Latin, petra = stone + Greek, kephale = head (Ref. 45335).
Eponymy: Franz Steindachner (1834–1919) was an Austrian zoologist who specialised in herpetology and ichthyology. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / نطاق العمق / distribution range
البيئة
; المياه العذبة القاع. Tropical
Africa: Rufuji River system, Tanzania (Ref. 91771).
الحجم / وزن / العمر
النضج: Lm ? range ? - ? cm
Max length : 6.6 cm SL ذكر/ مختلط الجنس; (Ref. 91771)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشواك الظهرية (المجموع) : 0; الأشعة الظهرية الناعمة (المجموع) : 22 - 27; شوكة شرجية: 0; أشعه شرجية لينه: 26 - 31. Diagnosis: Body depth 29.4-32.8% of standard length; head length 27.2-27.4% of standard length; length of snout to centre of eye 31.1-34.3% of head length; length of snout to posterior orbital rim of eye 43.4-43.8% of head length; predorsal length 62.3-64.1% of standard length; preanal length 60.1-61.6% of standard length; dorsal fin length 17.3-20.6% of standard length; anal fin length 22.2-25.2% of standard length; distance dorsal fin origin to end of caudal peduncle 40.2-43.2% of standard length; length of caudal peduncle 19.5-21.1% of standard length; depth of caudal peduncle 28.5-31.3% of its length (Ref. 91771).
Body shape (shape guide): fusiform / normal.
Life cycle and mating behavior
النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
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)
IUCN Red List Status (Ref. 130435: Version 2025-1)
استخدامات بشرية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Phylogenetic diversity index (مرجع
82804): PD
50 = 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).
مستوى غذائي (مرجع
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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