分類 / 名前
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Characiformes (Characins) >
Crenuchidae (South American darters) > Characidiinae
Etymology: Characidium: Diminutive of Charax, -akos = a fish without identification (Ref. 45335); itarare: Name 'itarare' from the tupi word meaning 'stone carved by the water', in allusion to the underground rivers in the region. Also in reference to the type locality of the species, Rio Itararé basin. Noun in apposition.
環境:環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
; 新鮮な水 底生の漂泳性. Tropical
South America: Brazil.
サイズ / 重さ / 年齢
成熟: Lm ?  range ? - ? cm
Max length : 5.3 cm オス/雌雄の選別がない; (Ref. 133152)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 8 - 9; 臀鰭: 6. This species is distinguished from its congeners by the following set of characters: scaled isthmus; secondary bars absent; dark-brown, vertically elongated middorsal blotches that lack pigmentation in their central region, appearing diamond-like (larger specimens) and diamond-like blotches, vertically elongated and fully pigmented (smaller specimens); black chromatophores in caudal fin; roundish black marks on the pelvic absent, dorsal and anal fins; tricuspid dentary teeth present; peduncular blotch absent; white gap between posterior edge of the opercle and the humeral blotch absent; longitudinal stripe in the mid-lateral region of body ending in peduncle caudal; pre-orbital stripe present; area between pelvic fin and origin of anal fin straight in lateral view (Ref. 133152).
Body shape (shape guide): elongated; Cross section: compressed.
This species is found in steams with clear water and substrate composed of sand and small pebbles (Ref. 133152).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Stabile, B.H.M., R.B. dos Reis, A. Frota, W.J. da Graça and A.V. de Oliveira, 2024. Morphology and molecular evidence of a new species of Characidium (Characiformes: Crenuchidae) from the edges of a protected area at Rio Itararé, upper Rio Paraná, southern Brazil. J. Fish Biol. 105:1850-1861. (Ref. 133152)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
人間の用途
水産業: 興味がない
用具
特記事項
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インターネットの情報源
モデルに基づく推定値
系統多様性指数 (参照 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01023 (0.00450 - 0.02327), b=3.08 (2.90 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
栄養段階 (参照 69278) |
3.5 ±0.3 se; based on size and trophs of closest relatives |
漁業の脆弱性 (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |