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) >
Arhynchobatidae (Softnose skates)
Etymology: aenigma: Name from Latin 'aenigma' or enigma, in allusion to its unresolved taxonomic status.
More on authors: Last & McEachran.
Taxonomic Remarks
Placement in the genus is provisional pending the discovery of juvenile specimens. Based on a 43.6 cm TL female holotype which is probably close to maturity, lacking both rostral and orbital thorns (Ref. 58023).
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 ? - 437 m (Ref. 58023). 深水域
分布
領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
Western Pacific: New Zealand.
西太平洋: 紐西蘭。
大小 / 重量 / 年齡
成熟度: Lm ?  range ? - ? cm
Max length : 43.6 cm TL 雄魚/尚未辨別雌雄; (Ref. 58023)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
A species of Brochiraja with the following combination of characters: rounded disc; very long tail, 1.5 times disc length, 2.9 times ventral head length, 6.8 times snout length; orbit moderately large, 2.4 in preorbital snout length; calcified rostral shaft very short; tail base narrow, width at pelvic fin insertions 2 times width at midlength; dermal denticles closely spaced, over entire upper disc; mid-dorsal surface of tail with thorns and denticles; dorsolateral surface of tail without thorns; orbital thorns absent; entire ventral surface naked; medium brownish with darker mottling above and below; indistinct rows of pale-edged pores on ventral surface; nuchal pore band indistinct; anterior pelvic fin lobe bulbous, black tipped; total pectoral radials 73-74; predorsal vertebrae 115; c. 30 tooth rows in upper jaw (Ref. 58023).
Body shape (shape guide): other.
一個 Brochiraja 的種用下列的組合特徵: 圓的體盤; 非常長的尾部, 1.5 倍體盤長度, 2.9 倍頭部下面長度, 6.8 倍吻長; 眼窩普通大的, 2.4 在眶前骨吻的長度中; 變成石灰質嘴的軸了非常短的; 尾部基底狹窄的, 寬度在腹鰭嵌入在身體中央兩倍寬度; 表皮的細齒間隔很密的, 在整個的上體盤之上; 背部中央表面尾部有刺與細齒; 沒有刺的尾部的背外側表面; 眼窩的刺不存在; 整個的腹面裸露的; 中等的褐色有較深色的雜斑上面與下面; 在腹面上的不明顯的列邊緣灰白的孔; 頸背的孔條紋不明顯的; 前面的腹鰭葉凸起的, 黑色的頂端; 總計胸的動脈 73-74; 前背的脊椎骨 115; c。 在上頜中的 30個齒列.(參考文獻 58023)
Known only from a single specimen; no information on mature males or juveniles (Ref. 58023).
已知只來自一件標本.; 關於成熟的雄性或稚魚的沒有資訊.(參考文獻 58023)
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
西太平洋: 紐西蘭。
Last, P.R. and J.D. McEachran, 2006. New softnose skate genus Brochiraja from New Zealand (Rajidae: Arhynchobatinae) with description of four new species. N. Z. J. Mar. Freshwater Res. 40(1):65-90. (Ref. 58023)
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) |
PD50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00562 (0.00287 - 0.01102), b=3.11 (2.94 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
營養階層 (參考文獻 69278) |
3.7 ±0.7 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 (46 of 100). 🛈 |