分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Actinopteri > Characiformes
(Characins) > Crenuchidae
(South American darters) > Characidiinae
Etymology: Characidium: Diminutive of Charax, -akos = a fish without identification (Ref. 45335); xavante: Named for its type locality, Córrego Xavante. Xavante refers to the indigenous Brazilian ethnic group, inhabiting the region between the Rio das Mortes and Rio Culuene, Mato Grosso; also the stream at the type locality is named after this ethnic group.
Environment: milieu / climate zone / depth range / distribution range
; 淡水 底中水层性.
South America: Rio Culuene watershed, upper Rio Xingu drainage in Brazil.
大小 / 重量 / 年龄
Maturity: Lm ?  range ? - ? cm
Max length : 2.8 cm SL 雄鱼/尚未辨别雌雄; (Ref. 75787)
型态特徵 | 形态测量图
背的软条 (总数): 12-13; 臀鳍软条: 9 - 10; 脊椎骨: 32 - 33. Belongs to a group of species, including Characidium nupelia, distinguished uniquely by having high number (12-18) of dark vertical bars on the body, each bar having the width of a scale. Diagnosed by a lower number of scales around the caudal peduncle (10 vs. 12 or more in most Characidium species). Differs from Characidium nupelia by its wider interorbital region (interorbital distance 30.1-38.0 vs. 20.5-28.6% HL) and lower caudal peduncle (caudal peduncle depth 35.4-44.9 vs. 46.2-57.8% HL). Additional conspicuous external characters that are not unique but are helpful in the identification of this species include absence of adipose fin, incomplete lateral line, and presence of a dark blotch on the caudal peduncle (Ref. 75787).
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
da Graça, W.F., C.S. Pavanelli and P.A. Buckup, 2008. Two new species of Characidium (Characiformes: crenuchidae) from Paraguay and Xingu River Basins, State of Mato Grosso, Brazil. Copeia 2008(2):326-332. (Ref. 75787)
CITES (Ref. 123416)
合作者照片Stamps, Coins Misc.声音神经毒速度泳型鳃区Otoliths脑重体重比眼睛色素
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00309 - 0.01700), b=3.08 (2.88 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
营养阶层 (Ref. 69278
): 3.2 ±0.3 se; based on size and trophs of closest relatives
回复力 (Ref. 120179
): 高度, 族群倍增时间少于 15个月 ().
脆弱性 (Ref. 59153
): Low vulnerability (10 of 100) .