Rhadinoloricaria

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Rhadinoloricaria
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Loricariidae
Subfamily: Loricariinae
Tribe: Loricariini
Genus: Rhadinoloricaria
Isbrücker & Nijssen, 1974
Type species
Rhadinoloricaria macromystax
(Günther, 1869)
Synonyms

Apistoloricaria

Rhadinoloricaria is a genus of catfish endemic to South America. [1] It was considered to be monotypic until the 2020 discovery of a second species. [2]

Contents

Rhadinoloricaria is part of the Pseudohemiodon group of the tribe Loricariini in the subfamily Loricariinae. [1] Apistoloricaria and Crossoloricaria include fish that are very similar to Rhadinoloricaria, and it has been proposed that the former two genera be synonymized with the latter.

Species

There are currently nine recognized species: [3]

Distribution and habitat

Representatives of this genus are distributed in the upper Amazon and Orinoco drainages, along the Atlantic slope of the Andes. [4]

Appearance and ecology

These fish range from 10–14.2 centimetres (3.9–5.6 in) SL. [5] In members of this genus and other closely related genera, the body is strongly depressed and the pelvic fins are used for locomotion, enabling these fish to appear to "walk" on the substrate. [4] Sexual dimorphism is apparent through differentiated lip structure. The lip surfaces of the male are rather papillose while those of the female are filamentous. [4]

These species are abdomino-lip brooders; eggs are laid in a single layered mass, and are attached to the surface of the lower lip and abdomen of the male. [4]

References

  1. 1 2 Covain, Raphael; Fisch-Muller, Sonia (2007). "The genera of the Neotropical armored catfish subfamily Loricariinae (Siluriformes: Loricariidae): a practical key and synopsis" (PDF). Zootaxa . 1462: 1–40.
  2. ↑ Provenzano-Rizzi, Francisco; Barriga-Salazar, Ramiro (2020-05-21). "New finding of Rhadinoloricaria macromystax (Siluriformes: Loricariidae): redescription of the genus and description of a new species from Ecuador" . Zootaxa. 4779 (4): 485–500. doi:10.11646/zootaxa.4779.4.2. ISSN   1175-5334.
  3. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Rhadinoloricaria". Catalog of Fishes . California Academy of Sciences . Retrieved 14 September 2025.
  4. 1 2 3 4 Covain, Raphael; Fisch-Muller, Sonia (2007). "The genera of the Neotropical armored catfish subfamily Loricariinae (Siluriformes: Loricariidae): a practical key and synopsis" (PDF). Zootaxa . 1462: 1–40. doi:10.11646/zootaxa.1462.1.1 . Retrieved 2009-06-25.
  5. ↑ Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Rhadinoloricaria". FishBase . December 2011 version.


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