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Priocharax rex Mattox, Acosta-Santos, Bogotá-Gregory, Agudelo & Lima, 2025
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Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) > 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.
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.
Environment: milieu / climate zone / depth range / distribution range Ecology
Freshwater; benthopelagic; depth range 0 - 1 m (Ref. 138024). Tropical
Distribution Territories | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
South America: Colombia.
Size / Weight / Age
Short description Identification keys | Morphology | Morphometrics
Anal soft rays: 18 - 23; Vertebrae: 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.
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).
Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Main reference
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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)
CITES
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: of no interest
FAO - Publication: search | FishSource |
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Body composition
Nutrients
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Fish sound
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Internet sources
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, Search |