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Microsternarchus brevis  Cox Fernandes, Nogueira, Williston & Alves-Gomes, 2015

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Microsternarchus brevis
Male picture by Cox Fernandes, C.

分类 / Names 俗名 | 同种异名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii 辐鳍鱼纲 (条鳍鱼) > Gymnotiformes (Knifefishes) > Hypopomidae (Bluntnose knifefishes)
Etymology: Microsternarchus: Greek, mikros = small + Greek, sternon = breast + Greek, archos = anus (Ref. 45335);  brevis: Named for its overall size and caudal filament (Latin 'brevis' for short).

环境 / 气候 / 范围 生态学

; 淡水 大洋性; pH range: 4.0 - 5.0; 深度上下限 0 - 2 m (Ref. 104297).    25°C - 26°C (Ref. 104297), preferred ?

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South America: Brazil.

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 5.3 cm TL 雄鱼/尚未辨别雌雄; (Ref. 104297); 5.3 cm TL (female)

简单描述 型态特徵 | 形态测量图

This species is distinguished by the following characters: short caudal filament 12.8-20.9% of TL; size of body small 3.75-5.32 cm SL; slightly inferior mouth 1.34-2.42 cm HL; pigmentation on body uniformly distributed along the entire area, including head; it also lacks a well delineated dark area on the pseudotympanum, where the anterior end of the posterior lateral line nerve branches with the dorsal ramus of the posterior lateral line nerve (Ref. 104297).

生物学特性     字汇 (例如 epibenthic)

This species is collected in shallow areas from 0.5-1.5 m in the dry season or at the beginning of the rainy season. It also occurs in black-water streams along the middle part of the rio Negro Basin (Amazon). Along stream margins, it occurs in well oxygnated waler and prefers weak current with abundant submerged vegetation, roots and leaf litter. In areas with stronger current, this species tends to inhabit submerged trees and tangled roots of epiphytic plants. Variation of physico-chemical water parameters taken in 2002-2007: conductivity 9.0-22.2 µS/cm, temperature 25-26°C, ph 4.01-5.0 and dissolved oxygen 4.12-7.10 mg/L. Stomach contents of one specimen contains parts of zooplankton. Associated genera of gymnotiforms species collected in the area were Brachypopomus and Hypopgus (Ref. 104297).

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | | 孕卵数 | 仔鱼


主要参考文献 Upload your references | 参考文献 | 合作者 : Albert, James S. | 合作者

Cox Fernandes, C., A. Nogueira, A. Williston and J.A. Alves-Gomes, 2015. A new species of electric knifefish from the rio Negro, Amazon basin (Gymnotiformes: Hypopomidae, Microsternarchini). Proc. Acad. Nat. Sci. Phil. 164(1):213-227. (Ref. 104297)

世界自然保护联盟红皮书 (Ref. 115185)

  不评价 

CITES (Ref. 94142)

Not Evaluated

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