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Siluriformes (Catfishes) >
Loricariidae (Armored catfishes) > Hypoptopomatinae
Etymology: Chauliocheilos: Derived from a combination of the Greek chaulios (conspicuous, outstanding, prominent), and cheilos (lip), in reference to the labial appendix; saxatilis: From the Latin adjective saxatilis, meaning that lives on rocks, in reference to the microhabitat where the species is mainly collected. An adjective.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
; acqua dolce demersale. Tropical
South America: headwaters of rio Itamarandiba, upper rio Jequitinhonha drainage in southeastern Brazil.
Dimensione / Peso / Età
Maturità: Lm ? range ? - ? cm
Max length : 4.9 cm SL maschio/sesso non determinato; (Ref. 98819)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
Raggi dorsali molli (totale) : 8 - 9; Raggi anali molli: 6 - 7; Vertebre: 31. Chauliocheilos saxatilis is distinguished from all species of the Loricariidae by its unique labial appendix at laterodorsal portion of lower lip, associated to the proximal region of insertion of the maxillary barbel, in females above 3.24 cm SL and in males above 3.0 cm SL, but always much more developed in males, in which the appendix is highly grooved and can be very elongated posteriorly, surpassing the anterior portion of pectoral girdle. It differs further from all members of Hypoptopomatinae by the possession of 2 additional series of lateral plates on the body, one between the dorsal and mid-dorsal series with 2 to 16 plates, and the other between the mid-ventral and ventral series with 2 to 11 plates. Additional characters useful to identify this species within Hypoptopomatinae include the high number of lateral plates, mainly in the mid-dorsal (25-39) and mid-ventral series (28-41), lack of iris operculum, and the insertion of dorsal-fin posterior in the body, with the anterior portion of compound supraneural plus first dorsal-fin proximal radial contacting the neural spine of eighth vertebra (Ref. 98819).
Body shape (shape guide): elongated.
The type locality is a very small stream, about 1 m wide, up to 30 cm deep, with a bottom consisting of gravel, pebbles, sand and clay, and besides trees and shrubs, with its margins composed of many specimens of Hedychium sp. (Zingiberaceae). This species was collected mostly in the bottom but also associated with vegetation at the margins. Other fishes found in the same stream include Astyanax fasciatus, Rhamdia cf. quelen, Rhamdiopsis sp., Trichomycterus jequitinhonhae and Trichomycterus sp. Based on four specimens ranging from 4.10-4.75 cm SL, food items in the stomach were mainly fine particulate organic matter and periphyton (unicellular algae, diatoms, zooplankton and microcrustaceans) (Ref. 98819).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Martins, F.O., B.N. Andrade, A.C. Rosa and F. Langeani, 2014. Chauliocheilos saxatilis, a new genus and species of Hypoptopomatinae from rio Jequitinhonha basin, with a unique labial appendix (Teleostei: Loricariidae). Ichthyol. Explor. Freshwat. 25(3):193-204. (Ref. 98819)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Pesca: di nessun interesse
Strumenti
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Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00434 - 0.02202), b=3.06 (2.87 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
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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