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Petrocephalus microphthalmus Pellegrin, 1909

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Petrocephalus microphthalmus
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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 / depth range / distribution range 生态学

; 淡水 居于水底的. 熱帶

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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

Maturity: Lm ?  range ? - ? cm
Max length : 5.2 cm TL 雄鱼/尚未辨别雌雄; (Ref. 11970)

简单描述 检索表 | 型态特徵 | 形态测量图

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).
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)

生物学特性     字汇 (例如 epibenthic)


Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼

非洲: 剛果，奧克維河與沙那加河。

主要参考文献 Upload your references | 参考文献 | 合作者 | 合作者

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)

世界自然保护联盟红皮书 (Ref. 130435: Version 2024-1)

  最不相关 (LC) ; Date assessed: 16 February 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

  无害处的





人类利用

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 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 (Ref. 69278):  3.1   ±0.4 se; based on size and trophs of closest relatives
回复力 (Ref. 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).