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Characiformes (Characins) >
Stevardiidae (Stevardiids) > Hemibryconinae
Etymology: Hemibrycon: Greek, hemi = half + Greek, bryko = to bite (Ref. 45335); sierraensis: Named for the collection locality, in the Sierra Nevada of Santa Marta drainage, north from Colombia (Ref. 118119).
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
; acqua dolce benthopelagico. Tropical
South America, Colombia
Dimensione / Peso / Età
Maturità: Lm ?  range ? - ? cm
Max length : 7.2 cm SL maschio/sesso non determinato; (Ref. 118119)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
Raggi dorsali molli (totale) : 10; Raggi anali molli: 29 - 30; Vertebre: 40 - 41. Diagnosis: Hemibrycon sierraensis n. sp. is distinguished from all other species of the genus by having an iridescent red adipose fin in life (vs. hyaline or transparent in life, except H. divisorensis that has a reddish adipose fin) and by having a dark brown adipose fin in alcohol (vs. hyaline or transparent in alcohol); it differs from H. divisorensis, H. pautensis and H. santamartae in having the last dorsal-fin ray unbranched; it further differs from H. beni, H. boquiae, H. brevispini, H. colombianus, H. mikrostiktos, H. microformaa, H. metae, H. palomae and H. rafaelense in having a vertically elongate humeral spot that extends 3 to 4 scale rows below the lateral line series (vs. humeral spot roughly circular not extending ventrally 3 to 4 scales rows below lateral line series, or with inconspicuous, diffuse vertical extensions); it differs from H. pautensis by the number of scale series between the lateral line and the pelvic-fin insertions (4-5 vs. 6-7); it differs from H. divisorensis in the number of unbranched anal-fin rays (iii vs. iv), number of dentary teeth (10 vs. 13-16) and the number of maxillary teeth (6-7 vs. ten-13); in addition to the above characters, we found the following differences that distinguish this new species from those that occur in the same basin (and in allopatry with H. santamartae): fewer supraneurals (6 vs. 8), greater caudal peduncle depth (16.5-17.7 vs. 8.7-15.6% SL), longer head length (25.0-29.6 vs.18.4-25.2% SL) and smaller orbital diameter (23.9-34.8 vs. 33.1-45.7% SL) (Ref. 118119).
Body shape (shape guide): elongated; Cross section: oval.
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
García-Alzate, C.A., C. Román-Valencia and D.C. Taphorn, 2015. A new species of Hemibrycon (Characiformes: Characidae), a freshwater fish from the Sierra Nevada of Santa Marta, Caribbean drainage, Colombia. Cuadernos de Investigación UNED 7(1):89-97. (Ref. 118119)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Strumenti
Rapporti speciali
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Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00322 - 0.01872), b=3.13 (2.92 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Livello trofico (Fonte Biblio.
69278): 3.0 ±0.4 se; based on size and trophs of closest relatives
Vulnerabilità della pesca (Ref.
59153): Low vulnerability (10 of 100).
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