Squalius alburnoides
species of fish
Squalius alburnoides, the calandino, 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 found in Portugal and Spain.
Taxonomy
Squalius alburnoides was first formally described in 1866 by the Austrian ichthyologist Franz Steindachner, with its type locality given as a stream near Mérida in Spain. The Adana chub belongs to the genus Squalius, commonly referred to as chubs, which belongs to the subfamily Leuciscinae of the family Leuciscidae.
This species is a highly peculiar fish in regard to its evolution and reproduction. It has been derived from hybridisation between females of Squalius pyrenaicus and males of another, unknown, extinct cyprinid species, and maintains the genomes of both parental species. Squalius alburnoides may have various numbers of these genomes (polyploidy), and may use different reproductive modes to pass them on to the offspring, including asexual reproduction, normal meiosis and hybridogenesis. It has the first confirmed instance of natural androgenesis in a vertebrate, where an individual inherits only genes from the father.
Etymology
Squalius alburnoides belongs to the genus Squalius. This name was proposed by the French biologist Charles Lucien Bonaparte in 1837 for a subgenus of the genus Leuciscus for the Italian chub (Squalius cephalus), inserting an additional "i" to prevent homonymy with the spurdog genus Squalus.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated May 19, 2026. The linked authority identifier is Q21030115. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1866 and 1837.
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This entry incorporates text from “Squalius alburnoides” 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.