分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Holocephali
全頭亞綱 (銀鮫科) (chimaeras) >
Chimaeriformes (Chimaeras)
銀鮫目 (Chimaeras) >
Rhinochimaeridae (Longnose chimaeras)
長鼻銀鮫科 (Longnose chimaeras)
Etymology: Rhinochimaera: A chimaera with rhinos (Gr.), nose, referring to long, pointed proboscis of R. pacifica (See ETYFish); africana: ana- (L.), belonging to: named for both its distribution around southern Africa and for the Sea Fisheries Research Institute research vessel Africana, from which holotype was collected (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 深海底的; 深度上下限 549 - 1450 m (Ref. 11228). 深水域
Southeast Atlantic: southern Africa and Mozambique Channel. Pacific Ocean: Japan (off Hokkaido and northern Honshu) to the east China Sea, including Taiwan; Costa Rica and Peru.
東南大西洋。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 81.8 cm TL 雄魚/尚未辨別雌雄; (Ref. 97389)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
This species is distinguished by the following characters: elongate body with an elongate, broad and paddle-shaped pointed snout extending anterior to head (SNL 47.7% HDL), tapering to a slender tail; the junction of supraorbital and infraorbital canals on ventral side of snout is closer to the tip of the snout than to the nasal canal; ONC/TIO is greater than 1.4 (ONC/TIO= 1.64); TIO/SWF is less than 1.5 (TIO/SWF= 1.47); TIO/LNC is less than 3.0 (TIO/LNC= 2.75); tooth-plates are nearly smooth; eyes are relatively small (EYL 6.4% BDL), distinctly behind level of mouth; the first and second dorsal fins are separated by a relatively long interdorsal space (IDS 23.6% BDL) and not connected by a web of skin; caudal-fin axis weakly raised with the fin asymmetrical, the epaxial caudal-fin lobe narrower than hypaxial lobe; dorsal caudal tubercles 25; caudal filament vestigial; coloration uniformly dark brown across entire body, except the oronasal region which is abruptly paler than the body (Ref. 97389).
Rare (Ref. 11228). Oviparous (Ref. 205). Eggs are encased in horny shells (Ref. 205).
稀有的.(參考文獻 11228) 卵生的.(參考文獻 205) 卵被包在角狀的外型突起中。 (參考文獻 205)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Oviparous (Ref. 205).東南大西洋。
Heemstra, P.C., 1995. Additions and corrections for the 1995 impression. p. v-xv. In M.M. Smith and P.C. Heemstra (eds.) Revised Edition of Smiths' Sea Fishes. Springer-Verlag, Berlin. (Ref. 11228)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
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Estimates based on models
Preferred temperature (Ref.
123201): 2.1 - 8.2, mean 5.5 °C (based on 195 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6289 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00195 (0.00085 - 0.00449), b=3.14 (2.94 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.8 ±0.5 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 低的, 最小族群倍增時間4.5 - 14 年 (Assuming Fec <100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (53 of 100).
