分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Gonorynchiformes (Milkfishes) >
Kneriidae (Shellears)
Etymology: Cromeria: Perhaps related to the prehistoric Stone Age in eastern England; for the stone implements found in Cromer but needs more data.
Eponymy: Lord Cromer Evelyn Baring (1841–1917), 1st Earl of Cromer, was a soldier (1858–1877) and a particularly oppressive and racist colonial administrator. [...] (Ref. 128868), visit book page.
More on author: Boulenger.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 底中水层性. 热带
Africa: Upper White Nile basin in South Sudan (Ref. 28714, 57474) and Ethiopia (Ref. 58460).
非洲: 在苏丹的白色尼罗河上游流域.(参考文献 57474)
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 2.9 cm SL 雄鱼/尚未辨别雌雄; (Ref. 81276)
简单描述
检索表 | 型态特徵 | 形态测量图
背的软条 (总数) : 9 - 10; 臀鳍软条: 9 - 10; 脊椎骨: 41 - 45. Diagnosis: pelvic fin origin well in front of anterior base of dorsal fin; preorbital stripe absent; caudal peduncle depth 10.1-12.9% of SL; dorsal precaudal fin fold more pronounced, reaching base of dorsal fin; 6-7 pectoral fin rays; 6 (rarely 7) pelvic fin rays; 3 (rarely 2) supernumerary rays in anal fin; 7 dorsal fin pterygiophores; 8+8 principal caudal fin rays; cephalic lateral line canals and supraorbital bone absent; parasphenoid slender, without foramina for internal carotid arteries; neural spine of 2nd vertebra long and slender, at least 2 times length of its vertebral centrum and similar in shape to subsequent neural spines (Ref. 57474).
眶前骨斑纹不存在。 (参考文献 57474) 在前面的背鳍基底正前方的腹鳍起点.(参考文献 57474) 尾柄深度 10.1-12.9% 的 SL.(参考文献 57474) 体高 6.5-8.4 x SL。 头部 4.5-5.7 x SL。 圆的突出吻。 皮肤的折层在与之下上方几乎一半的尾柄。 气鳔连接到食道了。 发展良好的脑具有大部分的复原的关于皮肤的多骨骨骼的块。 微白色的身体, 淡黄色的背面有小的褐色斑点。
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
非洲: 在苏丹的白色尼罗河上游流域.(参考文献 57474)
Moritz, T., R. Britz and K.E. Linsenmair, 2006. Cromeria nilotica and C. occidentalis, two valid species of the African freshwater fish family Kneriidae (Teleostei: Gonorhynchiformes). Ichthyol. Explor. Freshwat. 17(1):65-72. (Ref. 57474)
世界自然保护联盟红皮书 (Ref. 130435: Version 2024-2)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
