分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Parodontidae (Scrapetooths)
Etymology: Apareiodon: Greek, a = without + Greek, pareia, -as = cheek + Greek, odous = teeth (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 底中水层性; pH range: 4.9 - 7.0; dH range: ? - 18. 熱帶; 20°C - 25°C (Ref. 13614)
South America: Orinoco River basin and the coastal basins of French Guiana, Guyana and Suriname.
南美洲: 奧里諾科河河流域與法屬圭亞那，蓋亞那與蘇利南的海岸流域。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 9.2 cm SL 雄鱼/尚未辨别雌雄; (Ref. 10296)
简单描述
检索表 | 型态特徵 | 形态测量图
背的软条 (总数) : 11 - 12; 臀鳍软条: 9 - 10; 脊椎骨: 39 - 41. It differs from all congeners by possessing two ventrolateral rows of dark spots aligned along the horizontal lines where first and second and second and third scale rows below lateral-line scale row overlap (one or both rows of spots coalesce into narrow zigzag stripes in most specimens, upper row occasionally poorly developed); by possessing patches of dark pigment extending along the anal fin base and on the ventral midline of the caudal peduncle to the caudal fin base. Another distinguishing feature is the insertion of the first pterygiophore of the dorsal fin after vertebra 13 or 14 vs. 10 to 12 (rarely 13) in other species (reflected in a mean predorsal distance exceeding 0.50 of SL in A. gransabana vs. less than 0.50 in other species); distinguished from all congeners except A. guyanensis by the usual presence of 5 (occasionally 6) teeth (not counting replacement teeth) on each premaxillary bone vs. 4 in other species. Teeth of A. gransabana are gently convex with about 10-12 cusps, whereas those of A. guyanensis are spade-shaped with a highly convex margin and about 14-15 cusps, further differing from all congeners by the presence of 10-11 vertical scale rows vs. usually 9. A. gransabana has a notably more laterally compressed, parallel-sided body than its characteristically terete congeners (body width/dorsal-fin origin to pelvic-fin insertion distance less than 0.60 vs. usually 0.70 or more); and the isthmus is approximately one-half as wide; the caudal peduncle is more constricted (least depth/dorsal origin to pelvic-fin base distance averages 0.43 versus 0.450-0.570 or more in other species with ranges rarely overlapping).
它有别于所有同类藉由持有被排列的二腹侧的列深色的斑点沿着水平线在哪里第一个与第二个与第二个与第三个鳞片列在侧线下鳞片列重叠;(一或者两者的列斑点在大多数的标本中合并成狭窄的曲折斑纹, 上面的列偶然地发展不良的) 藉由持有深色的延伸的区块沿着臀鳍基底与在尾梗到尾鳍基底的腹中联机。 另外有区别的特徵是背鳍的第一个支鳍骨的嵌入在脊椎骨 13 或 14之后 vs.10 到 12(很少地 13) 在其他的种方面;(在 A. gransabana 中超过 SL 中的 0.50 的平均的前背距离方面反映 vs. 少于 0.50 在其他的种方面) 与除了 A. guyanensis 以外的所有同类区分了藉由平常的有在每个上颌骨前的硬骨 5(偶然地 6)个齿 (不计算替换齿) vs.4 在其他的种方面。 A. gransabana 的齿逐渐中凸大约 10-12 尖头, 然而 A. guyanensis 的是具有一个的铲形的 , 高度中凸的边缘大约 14-15个尖头, 进一步不同于所有的同类藉由有 10-11 垂直的鳞片列 vs. 通常 9. A. gransabana 超过它的表示特性圆柱形同类有一个特别更侧扁又平行-边的身体;(身体宽度/ 背鳍起点到腹鳍嵌入距离少于 0.60 vs. 通常 0.70个或更多) 而且峡部大约一半当宽的; 尾梗是被压缩的更多。 (对腹鳍基底距离的最少深度/ 背鳍起点以范围对 0.450-0.570个或更多在其他的种方面平均 0.43 非部分重叠的)
Occurs in small streams mostly less than 10 m width in rocky areas with moderate to strong current. Schools of 20-40 individuals were found to swim in strong current near the substratum with a head-downward orientation. In reaches with moderate current, these fish usually swam higher above the substratum, and with more horizontal body orientation. Attains at least 9.2 cm SL.
在岩石区有中等的到强的水流中出现于小的溪流大部份少于 10 公尺宽度。 20-40个个体的鱼群被发现在下层土壤附近的强的水流中游泳具有一个头部-向下的方位。 在范围方面以平稳的水流，这些鱼通常游泳更高地高于下层土壤, 而且有更水平的身体方位。 达到至少 9.2 公分 SL 。
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
南美洲: 奧里諾科河河流域與法屬圭亞那，蓋亞那與蘇利南的海岸流域。
Starnes, W.C. and I. Schindler, 1993. Comments on the genus Apareiodon Eigenmann (Characiformes: Parodontidae) with the description of a new species from the Gran Sabana Region of eastern Venezuela. Copeia 1993(3):754-762. (Ref. 10296)
世界自然保护联盟红皮书 (Ref. 130435: Version 2024-1)
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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=0.01023 (0.00374 - 0.02799), b=3.06 (2.82 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
回复力 (Ref.
120179): 中等的, 族群倍增时间最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
