分类 / 名称
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Acanthuriformes (Surgeonfishes)
鱸形目 (Surgeonfishes) >
Chaetodontidae (Butterflyfishes)
蝴蝶魚科 (Butterflyfishes)
Etymology: semilunaris: The specific name 'semilunaris' is an adjective, referring to the halfmoon-shaped ocellated blotch on the dorsal fin.
环境：氛围 / 气候带 / 深度上下限 / 分布范围
生态学
海洋 礁区鱼类; 深度上下限 102 - 123 m (Ref. 126057).
分布
领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
Western Indian Ocean: Saya de Malha Bank. High Seas only.
大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 11.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 126057)
简单描述
检索表 | 型态特徵 | 形态测量图
背棘 (总数) : 11 - 12; 背的软条 (总数) : 20 - 21; 臀棘: 3; 臀鳍软条: 16 - 17; 脊椎骨: 24. This species is distinguished from its congeners by the following set of characters: pored lateral-line scales 37-41; black blotch present on each membrane associated with first and second
dorsal-fin spines; upper jaw is covered with scales; pelvic-fin spine and distal portion of 1st soft ray are whitish, while remaining portions of fin dusky to black; second black body band crossing pectoral-fin base, and is interrupted by many pale narrow lines; ocellated blotch on the dorsal-fin
soft-rayed portion semicircular or oval, with long axis/short axis ratio 1.6-2.0 (Ref. 126057).
Cross section: compressed.
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Matsunuma, M. and H. Motomura, 2022. Two new species of the butterflyfish genus Roa (Perciformes: Chaetodontidae). J. Fish Biol. 100(3):758-774. (Ref. 126057)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
人类利用
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特别资料
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网络资源
基于模型的估算
系统发育多样性指数 (参考文献
82804): PD
50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02239 (0.01107 - 0.04526), b=3.01 (2.84 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (参考文献
69278): 3.6 ±0.4 se; based on size and trophs of closest relatives
回复力 (参考文献
120179): 高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.).
渔业脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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