分類 / Names
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Siluriformes (Catfishes) >
Trichomycteridae (Pencil or parasitic catfishes) > Trichomycterinae
Etymology: Ituglanis: Greek, itys, ityos = circle + Greek, glanis = a fish that can eat the bait without touching the hook; a cat fish (Ref. 45335); agreste: The name agreste is from the Latin agrestis, meaning relative to land, field, wild, or rustic. This refers to eastern Brazil, encompassing the area between the Rio Grande do Norte State to the middle section of rio de Contas basin in Bahia State, that marks the transition between two distinct biomes, the Atlantic Forest and the semi-arid Caatinga, where the new species was discovered. A noun in apposition..
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性; 深さの範囲 0 - 2 m (Ref. 94155). Tropical
South America: Rio Gongogi drainage, rio de Contas basin in Brazil.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 4.4 cm SL オス/雌雄の選別がない; (Ref. 94155)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 11 - 12; 臀鰭: 10 - 11; 脊つい: 36. This species is diagnosed from all congeners, except Ituglanis paraguassuensis, by the following characters: 36 vertebrae (vs. 38 or more in all other Ituglanis, except in I. paraguassuensis, I. nebulosus, I. bambui, I. epikarsticus, I. ramiroi, and I. passensis;
unknown for I. guayaberensis); 5-6 ribs (vs. 2 or 3 in I. amazonicus, I. eichorniarum, I. gracilior, I. ina, I. macunaima, I. nebulosus, and I. parkoi ; 4 in I. laticeps and I. cahyensis; 7 in I. passensis); i,6 pectoral-fin rays (vs. i,4 in I. cahyensis, I. macunaima, and I. parahybae ; i,5 in I. amazonicus, I. eichorniarum, I. metae, and I. nebulosus; i,7 in I. bambui, I. epikarsticus, I. mambai, I. passensis; iii,5 in I. guayaberensis; i,8 in I. ramiroi); and irregular brown blotches covering the skin (vs. distinct color pattern in all other Ituglanis; absence in I. ina and the subterranean species, I. bambui, I. passensis, I. epikarsticus, and I. ramiroi). Ituglanis agreste is also easily distinguished from the subterranean species by its large eyes (vs. minute eyes) and intense pigmentation (vs. pigmentation absent or almost lack); and from its geographically closest species I. paraguassuensis by having 26-30 odontodes in an elongate interopercle patch (vs. reduced with 14-15 odontodes); seven branchiostegal rays (vs. 8) and pore s1 lacking (vs. s1 present) (Ref. 94155).
Occurs in a mid-small size river with width up to 8 m, in a moderate slope with clear and cold water, with transparency of about 2 m. The river is characterized by mainly turbulent water flow , with alternating areas of currents and pools, though a predominance of moderate to strong drifts. The substrate is composed of rocks and sand. Collected together with Astyanax bimaculatus (Linnaeus), Callichthys callichthys (Linnaeus), Geophagus brasiliensis (Quoy & Gaimard), Rhamdia quelen (Quoy & Gaimard) and Poecilia reticulata Peters (Ref. 94155).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生
Lima, S.M.Q., C.P. Neves and R.M. Campos-Paiva, 2013. Ituglanis agreste, a new catfish from the rio de Contas basin, northeastern Brazil (Siluriformes: Trichomycteridae). Neotrop. Ichthyol. 11(3):513-524. (Ref. 94155)
Human uses
用具
特記事項
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00282 - 0.01550), b=2.99 (2.79 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
