Classificatie / Namen
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Siluriformes (Catfishes) >
Heptapteridae (Three-barbeled catfishes)
Etymology: Imparfinis: Latin, impar = unequal + Greek, finis, pinna = wing, fin (Ref. 45335); arceae: Name 'arceae' in honor of Dr.Mariangeles Arce Hernandez for her valuable contributions to
the studies of the systematics and evolution of catfishes.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
; zoet water demersaal. Tropical
South America: Brazil.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ?  range ? - ? cm
Max length : 6.7 cm SL mannelijk / geslacht onbekend; (Ref. 137469)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 6; Anale zachte stralen: 7; Wervels: 39. This species is distinguished by the following set of characters: wide, dark midlateral stripe from snout tip to caudal peduncle sharply contrasting pale underside and aligned with dark stripe centered on dorsal portion of lower caudal-fin lobe; 11-12 gill rakers on the first ceratobranchial; dark brown W-shaped band at the base of caudal peduncle absent; 39 vertebrae; maxillary barbel surpassing vertical through dorsal-fin origin; short, flexible extension of the pectoral- and dorsal-fin spines, and outermost primary rays of upper caudal-fin lobe absent (Ref. 137469).
Body shape (shape guide): elongated; Cross section: oval.
This species inhabits fast-flowing, clear-water streams, with marginal vegetation (Ref. 137469).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Silva, G.S.C., M.H. Sabaj Pérez, K.R.D Carvalho and C. Oliveira, 2025. Integrative Taxonomy Reveals a New Species of Imparfinis (Siluriformes: Heptapteridae) from the Upper Xingu River Basin. Ichthyology & Herpetology 113(1):143-153. (Ref. 137469)
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 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00813 (0.00374 - 0.01767), b=2.97 (2.79 - 3.15), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trofisch niveau (Ref. 69278) |
3.1 ±0.5 se; based on size and trophs of closest relatives |
Weerstandsvermogen (Ref. 120179) |
Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.). |
Kwetsbaarheid van de visserij (Ref. 59153) |
Low to moderate vulnerability (34 of 100). 🛈 |