Classificazione / Nomi
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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); rex: Name from Latin 'rex' for king, in allusion to the large size of this species when compared with its congeners; noun in apposition.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
; acqua dolce benthopelagico; distribuzione batimetrica 0 - 1 m (Ref. 138024). Tropical
South America: Colombia.
Dimensione / Peso / Età
Maturità: Lm ? range ? - ? cm
Max length : 2.0 cm SL maschio/sesso non determinato; (Ref. 138024)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
Raggi anali molli: 18 - 23; Vertebre: 32 - 33. This species is distinguished from all its congeners by the presence of a round flap of skin between contralateral pelvic-fins bases (vs. absence); differs further except P. nanus, P. pygmaeus, P. varii by the not having infraorbitals; differs from P. britzi, P. nanus, P. pygmaeus, P. varii by having fewer premaxillary teeth (14-19 vs. 20-29), from P. conwayi, P. marupiara, P. phasma by having more maxillary teeth (30-38 vs. 13-29); presence of two postcleithra; with five branched pelvic-fin rays; absence of adipose fin (Ref. 138024).
Body shape (shape guide): elongated; Cross section: compressed.
Collected from a small, shallow (less than 1 meter deep), slow-flowing terrafirme dark water streams, its channel width less than 15 meters at its widest point. At the time of sampling, water temperature was 25.6°C, conductivity 34 µS/cm, pH 5.3, and dissolved oxygen 2.03 mg/l. The substrate of the sampled section was composed mainly by silt and clay, with some leaf litter, and logs; all specimens were collected at the marginal vegetation (Ref. 138024).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Mattox, G.M.T., A. Acosta-Santos, J.D. Bogotá-Gregory, E. Agudelo and F.C.T. Lima, 2025. A new miniature Priocharax from the río Putumayo drainage, Amazonas State, Colombia (Teleostei: Characiformes: Characidae) with an unusual skin flap between pelvic fins. Zootaxa 5575(4):545-554. (Ref. 138024)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Pesca: di nessun interesse
Strumenti
Rapporti speciali
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Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio.
82804): PD
50 = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: 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).
Livello trofico (Fonte Biblio.
69278): 3.0 ±0.4 se; based on size and trophs of closest relatives
Resilienza (Fonte Biblio.
120179): Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (Preliminary K or Fecundity.).
Vulnerabilità della pesca (Ref.
59153): Low vulnerability (10 of 100).
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