Alestion rapax

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Alestion rapax Roberts, 2019

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drawing shows typical species in Alestidae.

分类 / Names 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Characiformes (Characins) > Alestidae (African tetras)
Etymology: Alestion: Alestion is from Alestes Müller & Troschel 1844 (origin unknown), and the Greek diminutive suffix -ion. Gender masculine. While names ended in -ion classically are of neuter gender, for purposes of zoological nomenclature they may be regarded as masculine, as also with Thrattidion Roberts 1972 and Leptophilypnion Roberts 2013.;  rapax: The species epithet rapax is from Greek rapax, an adjective meaning voracious, rapacious, or predatory (Ref. 123194).

Environment: milieu / climate zone / depth range / distribution range 生态学

; 淡水 底中水层性; 深度上下限 0 - 1 m (Ref. 123194).

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Africa: Kwilu River, Lower Congo River basin, in Democratic Republic of the Congo (Ref. 123194).

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 1.7 cm SL 雄鱼/尚未辨别雌雄; (Ref. 123194)

简单描述 型态特徵 | 形态测量图

背棘 (总数): 0; 背的软条 (总数): 10; 臀棘 0; 臀鳍软条: 14; 脊椎骨: 39 - 40. Diagnosis: This species differs from all other alestid and all other characiform species in having supposed adults with greatly enlarged conical teeth in two rows on the premaxillary and on the dentary (Ref. 123194). Mouth slightly upturned; jaws short, entirely anterior to eyes; teeth with large round base and sharp slightly recurved tip, evidently specialized for puncturing (Ref. 123194). Head and body laterally compressed, slender; circumorbital bones absent; scales absent; postcephalic laterosensory system absent (Ref. 123194).

生物学特性     字汇 (例如 epibenthic)

Found in river with maximum depth about one meter, width of river 40m; water turbid; bottom sand and gravel; with dense cover provided by Vossia and other aquatic plants on one side of channel (Ref. 123194). Stomach contents appear to be exclusively insect remains (Ref. 123194).

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


主要参考文献 Upload your references | 参考文献 | 合作者 | 合作者

Roberts, T.R., 2019. Alestion rapax, a new genus and species of miniature paedomorphic characiform fish with large conical teeth from the Lower Congo basin (Ostariophysi, Alestidae). Aqua, Int. J. Ichthyol., 25(3):85-102. (Ref. 123194)

世界自然保护联盟红皮书 (Ref. 130435)

  不评价 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

 





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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
营养阶层 (Ref. 69278):  3.0   ±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 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).