分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Crenuchidae (South American darters) > Characidiinae
Etymology: Characidium: Diminutive of Charax, -akos = a fish without identification (Ref. 45335); onca: Name from Portuguese 'onca', referring to the jaguar Panthera onca (Linnaeus), alluding to the black spots in a bright gold-yellow body; noun in apposition (Ref. 123789).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性.
South America: Brazil.
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 4.4 cm SL 雄魚/尚未辨別雌雄; (Ref. 123789)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 8 - 10; 臀鰭軟條: 6; 脊椎骨: 35 - 36. This species is distinguished from its congeners by the following characters: presence of small dots on the side of the body, arranged in two or three distinct longitudinal lines; short pectoral fin, not reaching the vertical that passes through the origin of the dorsal fin; absence of adipose fin and bars; scaled isthmus; absence of blotches on dorsum; presence of longitudinal gold stripe; and mouth small, terminal. Colouration: yellow to brownish with dorsum darker and whitish belly, with gold tint on opercle, eye and parts of the head (123789).
This species has restricted geographic distribution, currently known only from córrego Taquara and its tributaries. Maximum length based on type specimen, to be replaced with a better reference (Ref. 123789).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
Melo, M.R.S., M.C.L. Brito Ribeiro and F.C.T. Lima, 2021. A new, narrowly distributed, and critically endangered species of Characidium (Characiformes: Crenuchidae) from the Distrito Federal, Central Brazil. Neotrop. Ichthyol. 19(1). (Ref. 123789)
IUCN 瀕危狀態 (Ref. 130435)
極危 (CR) (B1ab(iii)); Date assessed: 08 April 2021
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
營養階層 (Ref.
69278): 3.4 ±0.3 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
