Classificatie / Namen
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Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Tyttobryconinae
Etymology: Priocharax: Greek, prio = to saw + Greek, charax, -akos = a fish without identification (Ref. 45335); varii: Named for the late Richard P. Vari, one of the most infuential researchers in Neotropical ichthyology of the past 40 years; noun in genitive.
Eponymy: Dr Richard Peter Vari (1949–2016) was a curator of fish at the Smithsonian. [...] (Ref. 128868), visit book page.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
; zoet water benthopelagisch. Tropical
South America: Brazil.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ?  range ? - ? cm
Max length : 1.4 cm SL mannelijk / geslacht onbekend; (Ref. 128819)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 9; Anale zachte stralen: 18 - 25; Wervels: 33. This species is distinguished from its congeners by the presence of an adipose fin (vs. absence); differs further from P. ariel and P. pygmaeus by the pelvic-fin rays i,6 with i,5 rare (vs. i,5); postcleithra 2 present (vs absent); differs further from P. ariel by having a shorter caudal peduncle 14-18 % SL (vs. 18- 24 % SL) (Ref. 128819).
Cross section: compressed.
Specimens were collected between 14:00 and 17:00 in a small tributary of the Rio Jamari, close to a bush of submerged macrophytes in a slow flowing part of the Rio Preto, approximately 200 m above rapids. It was collected with Apistogramma resticulosa, Axelrodia lindeae, Axelrodia stigmatias, Hemigrammus bellottii, Hyphessobrycon aff. sweglesi, Leporinus sp., Nannostomus trifasciatus, Odontocharacidium aphanes and Satanoperca sp. Three of these species are considered miniature: the characids Axelrodia lindeae, A. stigmatias and the crenuchid Odontocharacidium aphanes. This species and the three miniatures are mostly transparent, and with the larger Hemigrammus bellottii which has a predominantly translucent body in life, an ‘almost invisible league’ for the Rio Negro was proposed by Carvalho et al., 2006 (Ref. 128847 in Ref. 128819).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Mattox, G.M.T., C.S. Souza, M. Toledo-Piza, R. Britz and C. Oliveira, 2020. A new miniature species of Priocharax (Teleostei: Characiformes: Characidae) from the Rio Madeira drainage, Brazil, with comments on the adipose fin in characiforms. Vertebrate Zoology 70(3):417-433. (Ref. 128819)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van geen belang
Tools
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Schattingen op basis van modellen
Fylogenetische diversiteitsindex (Ref. 82804) |
PD50 = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
Trofisch niveau (Ref. 69278) |
3.0 ±0.4 se; based on size and trophs of closest relatives |
Weerstandsvermogen (Ref. 120179) |
Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.). |
Kwetsbaarheid van de visserij (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |