分类 / 名称
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Lebiasinidae (Pencilfishes) > Lebiasininae
Etymology: hoffmannorum: Named for Peter Hoffmann.
Eponymy: Dr Patrick Henri de Rham (d: 1936) is a Swiss zoologist, botanist, ichthyologist and aquarist in Lausanne, and was Expert Ecologist to the Coopération Technique Suisse. He is a Director of the Aquatic Conservation Network. (Also see Patrick and Rham) Peter Hoffmann of Salzgitter, Germany and Dr Martin Hoffmann of Hanover, Germany, collected the type specimens and, according to the etymology, it was they: “ …who managed to collect and acclimate the species and gave us precious information about [...] (Ref. 128868), visit book page.
More on authors: Géry & Zarske.
环境：氛围 / 气候带 / 深度上下限 / 分布范围
生态学
; 淡水 大洋性. 熱帶
分布
领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
South America: Mazaruni River, Guyana.
南美洲: 蓋亞那。
大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 6.1 cm SL 雄鱼/尚未辨别雌雄; (Ref. 47610)
背棘 (总数) : 2; 背的软条 (总数) : 8; 臀鳍软条: 9 - 10. Elongated body (greatest depth 4.60-5.45 in SL) with a narrow caudal peduncle; symmetrical caudal fin and a dorsal fin far backward. Transverse scales from dorsal to pelvic, 6 or 6.5; predorsal scales 15.5 or 16. Mouth somewhat superior with a short maxilla (apparent length 4.5-5.5 in HL), not quite reaching the level of the eye's front margin. Eyes relatively large. A longitudinal black band surmounted by a light line, from opercle to base of middle caudal rays (Ref. 47610).
Body shape (shape guide): elongated; Cross section: compressed.
延长的身体 (最大的高度 4.60-5.45 分之一标准体长) 具有一个狭窄的尾柄; 对称的尾鳍与一个背鳍远的向后地。 横跨的鳞片从背部的对腹鳍,6 或 6.5; 前背的鳞片 15.5 或 16. 嘴略微上方的具有一个短的颚骨 (明显的长度 4.5-5.5个 HL比率), 不完全达到眼的在前面的边缘的水平。 眼相当大的。 从鳃盖到中央尾部的鳍条的基底,一条纵向的黑色条纹顶上有一条淡的线了。 (参考文献 47610)
A shy species (probably the most timorous pencil-fish species), living mainly on the surface and hidden, when possible, under a floating leaf or other hiding possibility. Swims actively, in a fitful manner, the moving of the pectorals is alternative, not symmetric. In captivity, accepts all foods, including dry ones, but only on the surface, neglecting what falls on the bottom. No peculiar nocturnal coloration; no direct courtship was yet observed, only short hunts against each other (within and between sexes) without real fights (Ref. 47610).
一个害羞的种 (可能最胆怯的铅笔-鱼的种), 生活主要在表面与隐藏的, 当可能的时候,在一片漂浮的叶或其他的藏可能性下面。 以断断续续的方法, 活跃地游动,胸鳍的移动是交替的, 不是对称。 在繁殖场, 接受包括乾的一些所有的食物但是只有在表面上，忽略落在底部的东西。 没有特殊的夜行色; 没有直接的求偶期仍然被观察, 没有真正的战斗只短暂的争斗对抗彼此 (同性或异性间).(参考文献 47610)
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
南美洲: 蓋亞那。
Géry, J. and A. Zarske, 2002. Derhamia hoffmannorum gen. et sp. n. - a new pencil fish (Teleostei, Characiformes, Lebiasinidae), endemic from the Mazaruni River in Guyana. Zool. Abh., Staat. Mus. Tierk. Dresden (52):35-47. (Ref. 47610)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
易受伤害 (VU) (B1ab(iii,v)+2ab(iii,v)); Date assessed: 31 December 2020
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基于模型的估算
系统发育多样性指数 (参考文献
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00692 (0.00276 - 0.01737), b=3.05 (2.83 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (参考文献
69278): 3.4 ±0.4 se; based on size and trophs of closest relatives
渔业脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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