Squalius is a genus of freshwater ray-finned fish belonging to the family Leuciscidae, the daces, Eurasian minnows and reklated fishes. The fishies in this genus are found in Europe and Asia. Hybridization is not rare in the Leuciscidae, including this genus. S. alburnoides is known to be of ancient hybrid origin, with the paternal lineage deriving from a prehistoric species related to Anaecypris; the latter mated with ancestral S. pyrenaicus. Present-day S. alburnoides mates with sympatric Conspecificity of other species.[Collares-Pereira, M.J. & Coelho, M.M. (2010): Reconfirming the hybrid origin and generic status of the Iberian cyprinid complex Squalius alburnoides. Journal of Fish Biology, 76 (3): 707–715.]
Species
These are the currently recognized species in this genus:
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Squalius adanaensis Davut Turan, Maurice Kottelat & Doğan, 2013 (Adana chub)
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Squalius agdamicus S. N. Kamensky, 1901
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Squalius alburnoides (Steindachner, 1866) (Calandino)
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Squalius albus (Bonaparte, 1838) (Trasimeno chub)
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Squalius anatolicus (Bogutskaya, 1997) (Beyşehir chub)
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Squalius aradensis (Coelho, Bogutskaya, Rodrigues & Collares-Pereira, 1998) (Arade chub)
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Squalius aristotelis Özuluğ & Freyhof, 2011 (Tuzla chub)
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Squalius berak Heckel, 1843 (Mesopotamian chub)
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Squalius caetobrigus Mendes, Silvia Perea, Sousa, Sousa-Santos & Ignacio Doadrio, 2024
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Squalius cappadocicus Özuluğ & Freyhof, 2011
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Squalius carinus Özuluğ & Freyhof, 2011 (Chocolate chub)
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Squalius carolitertii (Doadrio, 1988) (Northern Iberian chub)
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Squalius castellanus Doadrio, Perea & Alonso, 2007 (Gallo chub)
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Squalius cephalus (Carl Linnaeus, 1758) (Common chub)
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Squalius cii (J. Richardson, 1857) (Marmara chub)
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Squalius fellowesii (Günther, 1868) (Aegean chub)
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Squalius gaditanus Doadrio, Sousa-Santos & Perea, 2023
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Squalius illyricus Heckel & Rudolf Kner, 1857
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Squalius irideus (Werner Ladiges, 1960) (Anatolian ghizani)
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Squalius keadicus (Stephanidis, 1971)
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Squalius kosswigi (M. S. Karaman (sr), 1972)
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Squalius kottelati Turan, Yılmaz & Kaya, 2009
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Squalius laietanus Doadrio, Kottelat & de Sostoa, 2007 (Ebro chub)
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Squalius latus Keyserling, 1861
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Squalius lepidus Heckel, 1843 (Mesopotamian pike chub)
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Squalius lucumonis (Bianco, 1983) (Etruscan chub)
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Squalius malacitanus Doadrio & Carmona, 2006 (Malaga chub)
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Squalius microlepis Heckel, 1843 (Imotski chub)
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Squalius moreoticus (Stephanidis, 1971) (Stymphalia chub)
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Squalius namak Roozbehan Khaefi, Esmaeili, Sayyadzadeh, Geiger & Freyhof, 2016
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Squalius orientalis (Nordmann 1840)
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Squalius orpheus Kottelat & Economidis, 2006 (Thracian chub)
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Squalius palaciosi (Doadrio, 1980) (Bogardillo)
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Squalius pamvoticus (Stephanidis, 1939) (Pamvotis chub)
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Squalius peloponensis (Valenciennes, 1844) (Peloponnese chub)
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Squalius platyceps Zupančič, Marić, Naseka & Bogutskaya, 2010
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Squalius prespensis (Fowler, 1977) (Prespa chub)
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Squalius pursakensis (Hankó (hu), 1925) (Sakarya chub)
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Squalius pyrenaicus (Günther, 1868) (Southern Iberian chub)
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Squalius recurvirostris Özuluğ & Freyhof, 2011 (Akşehir chub)
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Squalius ruffoi (Bianco & Franco Recchia, 1983)
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Squalius semae Turan, Kottelat & Bayçelebi, 2017
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Squalius seyhanensis Turan, Kottelat & Doğan, 2013 (Seyhan chub)
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Squalius spurius Heckel, 1843 (Orontes chub)
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Squalius squalus (Bonaparte 1837) (Italian chub)
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Squalius svallize Heckel & Kner, 1857 (Neretva chub)
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Squalius tartessicus Doadrio, Sousa-Santos & Perea, 2023
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Squalius tenellus Heckel, 1843 (Livno chub)
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Squalius torgalensis (Coelho, Bogutskaya, Rodrigues & Collares-Pereira, 1998) (Mira chub)
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Squalius turcicus De Filippi, 1865 (Transcaucasian chub)
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Squalius valentinus Doadrio & Carmona, 2006 (Eastern Iberian chub)
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Squalius vardarensis Stanko Karaman, 1928 (Vardar chub)
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Squalius verepi Turan, 2022
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Squalius zrmanjae S. L. Karaman, 1928 (Zrmanja chub)