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Teleostei >
Saccopharyngiformes (Swallowers and gulpers)
囊鰓鰻目 (Swallowers and gulpers) >
Monognathidae (Onejaws)
單頜鰻科 (Onejaws)
Etymology: Monognathus: Greek, monos = one + Greek, gnathos = jaw (Ref. 45335); nigeli: Named after Nigel Merrett who has provided the suthors with several specimens of Monognathus and was very helpful during their revisionary work.
Eponymy: Nigel Robert Merrett (d: 1940) is a British zoologist and ichthyologist. [...] (Ref. 128868), visit book page.
More on authors: Bertelsen & Nielsen.
環境: 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
海洋 深海區的; 深度上下限 1500 - 3910 m (Ref. 34506). 深水域
分布
領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
Eastern Central Atlantic. High Seas only.
東北大西洋。
大小 / 重量 / 年齡
成熟度: Lm ?  range ? - ? cm
Max length : 5.7 cm TL 雄魚/尚未辨別雌雄; (Ref. 34506)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 82 - 95; 臀鰭軟條: 56 - 60. M. nigeli differs from the other species of the genus by the following combination of characters: head long with elongate, pointed snout and almost straight jaw, skull length 6.0-7.0% TL, rostral fang strongly hooked with distal part in a neatly right angle to dorsal profile of skull, predorsal length 14.5-18.5% TL, anterior anal fin ray below dorsal fin ray nos. 15-21, and 5 lateral, subdermal spots of pigmentation (Ref. 34506).
Body shape (shape guide): eel-like.
M. nigeli 在組合特徵之後有別於本屬的另一個種藉由: 頭部長的有細長的, 尖的吻而幾乎直的頜,頭蓋骨長度 6.0-7.0% TL, 嘴的尖牙強烈地以末梢部的部份鉤住在一整潔地對頭蓋骨,前背的長度 14.5-18.5% TL 的背面輪廓的直角, 在背鰭鰭條不之下的前面臀鰭鰭條。 15-21, 與 5個側面又皮下顏色的斑點.(參考文獻 34506)
Four "Discovery" specimens were taken in closing nets between 1510 and 3910 m depth, three of these 1500-2000 m, and one 23 m above the bottom. The "Vityaz" specimen was taken between 3000 m and the surface (Ref. 34506).
四項 " 發現 " 標本在 1510 與 3910 公尺深之間被用閉合網採集, 其中的三個 1500-2000 公尺 , 與一個 23個公尺上方底部。 " Vityaz" 標本在 3000 公尺與表面之間採集.(參考文獻 34506)
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
東北大西洋。
Bertelsen, E. and J.G. Nielsen, 1987. The deep sea eel family Monognathidae (Pisces, Anguilliformes). Steenstrupia 13(4):141-198. (Ref. 34506)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
人類使用
漁業: 沒有興趣
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基於模型的估計
系統發育多樣性指數 (參考文獻
82804): PD
50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (參考文獻
69278): 3.2 ±0.5 se; based on size and trophs of closest relatives
釣魚的脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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