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Teleostei > Osteoglossiformes (Bony tongues) > Mormyridae (Elephantfishes)
Etymology: Petrocephalus:Latin, petra = stone + Greek, kephale = head (Ref. 45335). More on author: Pellegrin.
Environment: milieu / climate zone / 深度上下限 / distribution range 生态学
Africa: Sanaga River in the north to the more southern Kouilou-Niari River, including the rivers Ntem and Ogowe (Ref. 85331). Also in the middle Congo River basin, downstream up to the lower Congo River near Brazzaville (Ref. 85331) and southwards to Angola (Ref. 120641). 非洲: 剛果，奧克維河與沙那加河。
大小 / 重量 / 年龄
成熟度: Lm? range ? - ? cm Max length : 5.2 cm TL 雄鱼/尚未辨别雌雄; (Ref. 11970)
背的软条 (总数) : 18 - 21; 臀鳍软条: 25 - 29. Petrocephalus microphthalmus is distinguished from all other Petrocephalus species in Central Africa by the following combination of characteristics: short dorsal fin with only 18 or fewer branched rays, long anal fin with 23-27 branched rays, eye small (HL/ED=4,1-4,8), mouth moderately wide, only 9-11 teeth in the upper jaw, 14-20 teeth in the lower jaw, no more than 10 scales between the anterior base of the anal fin and the lateral line (Ref. 52344, 85331). Absence of black pigment patches, except for a characteristic black blotch on the anterior dorsal fin rays near the origin of this fin; body silvery/purplish, iridescent (Ref. 85331). Body shape (shape guide): fusiform / normal. 小眼岩头长颌鱼［Petrocephalus microphthalmus］ 被与来自加蓬的全部其他的 Petrocephalus 种区分被: 在背鳍与臀鳍中的少数分支条;(15 到 18[平均 16.5] 与 23 到 27[平均 25.4], 分别地) 没有在臀鳍的前面基底与侧线之间的超过 10个鳞片 (范围; 8-10, 平均 9); 一个小的眼 (直径在 4.1 与 4.8之间倍头长 [everage 4.5]).(参考文献 52344)
Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Gosse, J.-P., 1984. Mormyridae. p. 63-122. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 3203)
Phylogenetic diversity index (参考文献 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).
营养阶层 (参考文献 69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
回复力 (参考文献 120179): 高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100). 🛈
