分類 / 名稱
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鰓亞綱 (鯊魚與魟魚) (sharks and rays) >
Rajiformes (Skates and rays)
鰩目 (Skates and rays) >
Rajidae (Skates)
鰩科 (Skates)
Etymology: Leucoraja: Greek, leykos = white + Latin, raja = a fish, Raja sp. (Ref. 45335); longirostris: Name from Latin 'longus' = long and 'rostrum' = stiff snout; referring to the distinct long and pointed snout.
環境: 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
海洋 深海底的; 深度上下限 750 - 1050 m (Ref. 131089).
分布
領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
Western Indian Ocean: southern end of the Madagascar Ridge at Walters Shoals.
大小 / 重量 / 年齡
成熟度: Lm ?  range ? - ? cm
Max length : 71.1 cm TL 雄魚/尚未辨別雌雄; (Ref. 131089); 70.0 cm TL (female)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
The species is distinguished from all its congeners by its remarkably long and acutely angled
snout, with horizontal preorbital length 17.2-–22.6% TL (vs. 8.5-11.9% TL) and 4.2-6.1 (vs. 1.7-3.5) times orbit length, snout angle 65-85? (vs. 90-150?); with plain dorsal coloration; with an external clasper component dike; with four dorsal terminal (dt) cartilages (Ref. 131089).
Cross section: flattened.
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Weigmann, S., M.F.W. Stehmann, B. Séret and H. Ishihara, 2024. Description of a remarkable new skate species of Leucoraja Malm, 1877 (Rajiformes, Rajidae) from the Southwestern Indian Ocean: introducing 3D modeling as an innovative tool for the visualization of clasper characters. Biology 13:1-46. (Ref. 131089)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
人類使用
漁業: bycatch
工具
特別的報告
下載 XML
網路資源
基於模型的估計
系統發育多樣性指數 (參考文獻 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00339 (0.00168 - 0.00682), b=3.25 (3.08 - 3.42), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
營養階層 (參考文獻 69278) |
3.6 ±0.2 se; based on size and trophs of closest relatives |
回復力 (參考文獻 120179) |
中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.). |
釣魚的脆弱性 (Ref. 59153) |
Moderate to high vulnerability (48 of 100). 🛈 |