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).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 熱帶
South America: known only from the type locality in the headwaters of Caraguatá River, upper Uruguay River drainage.
南美洲: 已知只來自模式標本產地， Caraguata 河的河川源頭，烏拉圭河流域上游了。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 5.1 cm SL 雄魚/尚未辨別雌雄; (Ref. 36884)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 0; 背的軟條 (總數) : 11 - 13; 臀棘: 0; 臀鰭軟條: 7 - 9. Roundish black marks on the pelvic, dorsal and anal fins; a black band along the distal margin of anal and pelvic fins; a black band along the distal margin of anal and pelvic fins in adult males (band also present but fainter and narrower in juveniles and females); enlarged anal fin with rounded distal profile in adult males; fins brightly colored with orange or red chromatophores in live adult males; reduction of adipose fin, which may be very small or even absent; lateral line complete or at least extending well beyond the 12th scale of series.
在腹鰭上的圓的黑點, 背鰭與臀鰭; 一條黑色的條紋沿著臀鰭與腹鰭鰭的末梢部邊緣; 一條黑色的條紋在雄性成魚中沿著臀鰭與腹鰭鰭的末梢部邊緣;(條紋也存在的但是更模糊與更狹窄在稚魚與雌性中) 增大的臀鰭有在雄性成魚中圓的末梢部的輪廓; 鰭色彩鮮豔的有橘色的或在活的雄性成魚中的紅色色素胞; 脂鰭的減少, 那可能是非常小的或甚至不存在; 側線完整或延伸的至少越過系列的第 12個鱗片。
In a small river at 650 m altitude.
在 650個公尺高度的一條小的河中。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 已知只來自模式標本產地， Caraguata 河的河川源頭，烏拉圭河流域上游了。
Buckup, P.A. and L. Hahn, 2000. Characidium vestigipinne: a new species of Characidiinae (Teleostei, Characiformes) from Southern Brazil. Copeia 2000(1):150-155. (Ref. 36884)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-2)
極危 (CR) (B2ab(iii)); Date assessed: 07 November 2018
人類使用
漁業: 沒有興趣
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
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).
