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Characiformes (Characins) >
Anostomidae (Headstanders) > Anostominae
Etymology: Pseudanos: Derived from Greek, pseudes = false (Ref. 45335); varii: Named for Richard P. Vari, ichthyologist from the National Museum of Natural History, Washington D.C., in recognition of his vast, invaluable contribution to the knowledge of systematics of characiform fishes, particularly the anostomoid fishes.
Eponymy: Dr Richard Peter Vari (1949–2016) was a curator of fish at the Smithsonian. [...] (Ref. 128868), visit book page.
Lingkungan: lingkungan / zona iklim / kisaran kedalaman / jangkauan distribusi
Ekologi
; air tawar bentopelagis. Tropical
South America: Rio Negro basin in Brazil, Río Síapa and Río Atabapo in Venezuela.
Ukuran / Berat / umur
Kematangan: Lm ?  range ? - ? cm
Max length : 21.0 cm SL jantan/; (Ref. 91907)
deskripsi pendek
Kunci identifiaksi (pengenalan) | Morfologi | Morfometrik
duri punggung lunak (Keseluruhan (total)) : 11 - 13; vertebrata, bertulang belakang: 41 - 43. Distinguished from all other species of Pseudanos by having the following characters: three branchiostegal rays (vs. four in P. gracilis and most specimens of P. winterbottomi); dark transversal bars on dorsum absent (vs. present in P. trimaculatus); dark spots present on the center of each body scale, forming conspicuous, straight dark lines (vs. dark spots absent in P. gracilis; and in some specimens of P. trimaculatus), four midlateral dark blotches on body (vs. usually two, sometimes three or four in P. trimaculatus, or body lacking midlateral blotches and presenting instead a broad midlateral stripe in P. winterbottomi); angle of the dorsal and ventralmost radii of body scales between 40° and 90° (vs. angle between 110° and 180° in P. gracilis and P. trimaculatus); and cranial fontanel opened along its entire length (vs. cranial fontanel partially closed in P. trimaculatus) (Ref. 91907).
Body shape (shape guide): fusiform / normal.
Adults occur in blackwater rivers and seasonally flooded forest on shores of river or oxbow lakes (Ref. 91907). Distinct pairs breed on densely grown weedy places (Ref. 205).
Siklus hidup dan perilaku kawin
Kematangan | Reproduksi, perkembang biakan | Pemijahan | telur-telur | Fekunditas | Larva
Distinct pairs breed on densely grown weedy places (Ref. 205).
Birindelli, J.L.O., F.C.T. Lima and H.A. Britski, 2012. New species of Pseudanos Winterbottom, 1980 (Characiformes: Anostomidae), with notes on the taxonomy of P. gracilis and P. trimaculatus. Zootaxa 3425:55-68. (Ref. 91907)
Status IUCN Red List (Ref. 130435: Version 2025-2 (Global))
ancaman kepada manusia
Harmless
penggunaan manusia
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimasi berdasarkan model
Indeks keanekaragaman filogenetik (Acuan 82804) |
PD50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01072 (0.00419 - 0.02740), b=3.04 (2.82 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Tingkat Trofik (Acuan 69278) |
2.4 ±0.2 se; based on size and trophs of closest relatives |
Daya lenting (Acuan 120179) |
sedang, Waktu penggandaan populasi minimum 1.4 - 4.4 tahun (Preliminary K or Fecundity.). |
Kerentanan Penangkapan Ikan (Ref. 59153) |
Low to moderate vulnerability (33 of 100). 🛈 |