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Danionella cerebrum Britz, Conway & Rüber, 2021

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drawing shows typical species in Danionidae.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Cypriniformes (Carps) > Danionidae (Danios) > Danioninae
Etymology: Danionella: Vernacular name fron India and Sri Lanka; diminutive; cerebrum: Name from Latin 'cerebrum' for brain, referring to the fact that this species has one of the smallest adult brains among vertebrates and has become a promising new model for neurophysiological studies; noun in apposition.

Environment: milieu / climate zone / depth range / distribution range 生態學

; 淡水 底中水層性; 深度上下限 0 - 1 m (Ref. 131371).

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Asia: Myanmar.

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 1.4 cm SL 雄魚/尚未辨別雌雄; (Ref. 131371)

簡短描述 檢索表 | 型態特徵 | 形態測量圖

背的軟條 (總數) : 8 - 9; 臀鰭軟條: 15 - 18; 脊椎骨: 33 - 35. This species is distinguished by the following characters:A 15-18; pectoral-fn rays 6; vertebrae 33-35; presence of a ventromedially directed cartilage flange from the taenia marginalis anterior that approaches the trabecula communis; presence in the male of bony flanges on the outer arm of the os suspensorium and a connection of these to the lateral process of vertebra 2;, presence of a maxillo-mandibular cartilage; absence of odontoid processes in the male; anal-fn pterygiophores 14-17; principal caudal fn rays 9 + 9; pelvic-fin rays 5; differs from D. translucida by the last dorsal-fn ray inserted opposite to the last anal-fn ray (vs. last dorsal-fn ray inserted posterior to last anal-fn ray), by the last anal-fn pterygiophore inserted in front of haemal spine of vertebra 22–24 (vs. 19–21), by the lateral process of the second vertebra blade-like (vs. axe shaped), and by the distal tip of the fused inner arms of the ossa suspensoria bifurcated (vs. single) and not reaching the middle of the anterior swimbladder (vs. curving around and reaching middle of anterior swimbladder (Ref. 131371).

生物學特性     字彙 (例如 epibenthic)

This species was found in turbid low altitude streams with visible flow, surface temperatures of around 30 °C, pH 7.4-7.5 and soft water of 20-100 micro Siemens. It was not found at the surface, but at a depth below ca. 30 cm where the water is signifcantly cooler (ca. 25 °C). The species was found abundant at the type locality where it co-occurred with D. translucida, which appears to have been less common (Ref. 131371).

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚


主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

Britz, R., K.W. Conway and L. Rüber, 2021. The emerging vertebrate model species for neurophysiological studies is Danionella cerebrum, new species (Teleostei: Cyprinidae). Scientific Reports 11:18942:1-11. (Ref. 131371)

IUCN 瀕危狀態 (Ref. 130435: Version 2024-2)

未評估 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

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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].
營養階層 (Ref. 69278):  3.0   ±0.3 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).