Classification / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Stevardiinae
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).
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt Sống nổi và đáy. Tropical
South America, Colombia
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 7.2 cm SL con đực/không giới tính; (Ref. 118119)
Short description
Khóa để định loại | Hình thái học | Sinh trắc học
Các vây lưng mềm (tổng cộng) : 10; Tia mềm vây hậu môn: 29 - 30; Động vật có xương sống: 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).
Life cycle and mating behavior
Maturities | Sự tái sinh sản | Spawnings | Egg(s) | Fecundities | Ấu trùng
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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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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=0.00813 (0.00372 - 0.01775), b=3.09 (2.90 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 3.0 ±0.4 se; based on size and trophs of closest relatives
Thích nghi nhanh (Ref.
120179): Chiêù cao, thời gian nhân đôi của chủng quần tối thiểu là dưới 15 tháng (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
