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Characiformes (Characins) >
Anostomidae (Headstanders)
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.
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
; স্বাদু পানি সমুদতলে ভাসমান বেনথোপেলাজিক. Tropical
South America: Rio Negro basin in Brazil, Río Síapa and Río Atabapo in Venezuela.
আকৃতি / ওজন / Age
Maturity: Lm ? range ? - ? cm
Max length : 21.0 cm SL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 91907)
Short description
সনাক্তকারী নির্দেশক | বহিঃ অঙ্গ সংস্থান | মরফোমেট্রিক্স
পৃষ্ঠীয় নরম পাখনা দন্ড (মোট ) : 11 - 13; কশেরুকা : 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).
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).
Life cycle and mating behavior
পরিপক্কতা | প্রজনন | ডিম ছাড়া | ডিমসমূহ | ডিম্বধারন ক্ষমতা | শুককীট
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)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
হাতিয়ার
Special reports
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ইন্টারনেট সুত্র
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01072 (0.00507 - 0.02267), b=3.06 (2.88 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 2.4 ±0.1 se; based on size and trophs of closest relatives
স্থিতিস্থাপক (Ref.
120179): মাধ্যম , সর্বনিম্ন প্রজন দ্বিগুনের সময় ১.৪-৪.৪ বৎসর (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (16 of 100).
