Achondrostoma arcasii
species of fish
Achondrostoma arcasii, termed the bermejuela, is a species of freshwater ray-finned fish belonging to the family Leuciscidae, which includes the daces. Eurasian minnows and related fishes. This species is endemic to the northern Iberian Peninsula.
Taxonomy
Achondrostoma arcasii was first formally described as Leucos arcasii in 1866 by the Austrian ichthyologist Franz Steindachner with its type locality given as the Ebro River at Logroño in La Rioja and the Queiles River at Tudela in Navarre, both in Spain. It is now classified as a valid species in the genus Achondrostoma within the subfamily Leuciscinae of the family Leuciscidae. The genus was proposed in 2007 for three species which were split from Chondrostoma on the basis of genetic evidence with this species designated as the type species. Further genetic studies revealed that the taxon originally regarded as A. arcasiwas polyphyletic and that the fishes in the west of Spain were three different species A. garzonorum, A. asturicense and A. numantinum.
Etymology
Achondrostoma arcasii belongs to the genus Achondrostoma, this name places the prefix a-, meaning "without", in front of the genus name Chondrostoma, which is a combination of chondros, a word meaning "gristle" or "cartilage", with stoma, meaning "mouth". This is an allusion to the lack of the horny plates in the mouths of these fishes, which are present in Chondrostoma . The specific name, arcasii, honours Laureano Pérez Arcas, a Spanish zoologist who shared specimens with Steindachner.
Begin with the source’s own compact description: “Achondrostoma arcasii” is species of fish. The dossier treats that line as a proposition to test through Achondrostoma, arcasii and species, not as a finished interpretation.
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The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated May 21, 2026. The linked authority identifier is Q591612. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1866 and 2007.
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This entry incorporates text from “Achondrostoma arcasii” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.