分類 / 名稱
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Teleostei >
Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Thayeriinae
Etymology: yinyang: Derived from the ancient Taoistic Chinese philosophy and religion, describing two primal opposing but complementary principles said to be found in all non-static objects and processes in the universe. Yin, in Chinese, originally meant "sunless", as the northern side of a mountain, and as a concept evolved to embody the dark, passive, feminine element, corresponding to the night, the winter, the water, and the earth. Yang originally meant "sunny", as the southern side of a mountain, and it came to embody the bright, active, masculine element, corresponding to the day, the summer, the air and the fire. All forces in nature are expressions of yin and yang states. It is in their complementarity that balance is given to the universe. The new species is named in allusion to its complementary orange and black humeral blotches, which are reminiscent of the Taiji diagram, the pictorial representation of the state of undifferentiated absolute, encompassing both the yin and yang qualities (Ref. 82434).
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
; 淡水 底中水層性.
South America: known only from tributaries of the middle rio Tiquie, a tributary of the rio Uaupes, upper rio Negro basin, Amazonas state, Brazil
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 2.9 cm SL 雄魚/尚未辨別雌雄; (Ref. 82434)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 2; 背的軟條 (總數) : 9; 臀棘: 3 - 4; 臀鰭軟條: 19 - 23; 脊椎骨: 33 - 34. Distinguished from all other species of the genus Hemigrammus by having (in life) an orange blotch, located between two dark humeral blotches, immediately ahead and slightly above the posterior, darker second humeral blotch. Differs further from all congeners, except Hemigrammus haraldi, Hemigrammus luelingi, Hemigrammus neptunus, Hemigrammus ocellifer, Hemigrammus pretoensis, and Hemigrammus pulcher, by the possession of two humeral blotches. Diagnosed from all these species by the absence of a blotch on the caudal peduncle (vs. caudal peduncle blotch present).
Body shape (shape guide): short and / or deep.
Caught in moderately large (2-6 m wide) streams, with clear water, carrying little suspended sediment. Also collected from dark-colored waters or muddy, silt-laden waters (Ref. 82434).
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Lima, F.C.T. and L.M. Sousa, 2009. A new species of Hemigrammus from the upper rio Negro basin, Brazil, with comments on the presence and arrangement of anal-fin hooks in Hemigrammus and related genera (Ostariophysi:Characiformes:Characidae). aqua, Int. J. Ichthyol. 15(3):153-168. (Ref. 82434)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
無危 (LC) ; Date assessed: 07 November 2018
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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 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01738 (0.00721 - 0.04190), b=3.05 (2.84 - 3.26), 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): 3.0 ±0.4 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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