Classification / Names
Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa
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Siluriformes (Catfishes) >
Heptapteridae (Three-barbeled catfishes)
Etymology: Imparfinis: Latin, impar = unequal + Greek, finis, pinna = wing, fin (Ref. 45335); usmai: Dedicated to Saulo Usma for his contributions to
the ichthyological collection building in the Cauca valley, and for promoting an active interchange between Colombian and Venezuelan ichthyologists, since his MSc studies in 2000 at Universidad Nacional Experimental de los Llanos Ezequiel Zamora (Guanare, Venezuela) (Ref. 88952).
Environment: milieu / climate zone / depth range / distribution range
Ekologi
; sötvatten bentopelagisk. Tropical
South America: Colombia. Distributed along the
upper basin of río Cauca and río Magdalena, and in the lower río Patía basin on the Pacific slope of western cordillera of Colombia. Imparfinis usmai is sympatric with I. nemacheir in the río Magdalena.
Size / Vikt / Age
Maturity: Lm ? range ? - ? cm
Max length : 10.3 cm hane/ej könsbestämd; (Ref. 88952)
Short description
Bestämningsnycklar | Morfologi | Morfometri
Small heptapterid catfish (largest specimen 100.8 mm SL), with elongated body, triangular in cross-section at dorsal-fin origin, progressively more laterally compressed to tail region. Dorsal profile slightly convex from snout tip to dorsal-fin origin, slightly concave just posterior to dorsal-fin base to adiposefin origin, straight and descending along adipose-fin base, then ascending along caudal peduncle. Ventral profile of head straight, slightly convex along abdomen, then straight to analfin origin and slightly descending along caudal peduncle (Ref. 88952).
Life cycle and mating behavior
Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver
Ortega-Lara, A., N. Milani, C. DoNascimiento, F. Villa-Navarro and J.M. Maldonado-Ocampo, 2011. Two new trans-Andean species of Imparfinis Eigenmann & Norris, 1900 (Siluriformes: Heptapteridae) from Colombia. Neotrop. Ichthyol. 9(4):777-793. (Ref. 88952)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Verktyg
Special reports
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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=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.1 ±0.5 se; based on size and trophs of closest relatives
Resiliens (Ref.
120179): Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
