''Squalius palaciosi'', the bogardilla or Jándula chub, is an extinct

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

of freshwater

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

belonging to the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Leuciscidae Leuciscidae is a family of freshwater ray-finned fishes, formerly classified as a subfamily of the Cyprinidae, which contains the true minnows. Members of the Old World (OW) clade of minnows within this subfamily are known as European minnow ...

, which includes the daces, Eurasian minnows and related fishes. This species was

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Spain Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...

Taxonomy

''Squalius palaciosi'' was first formally described as ''Iberocypris palaciosi '' in 1980 by Spanish

ichthyologist Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 35,800 species of fish had been described as of March 2 ...

Ignacio Doadrio Villarejo Ignacio is a male Spanish name originating in the Latin name "Ignatius" from ''ignis'' "fire". This was the name of several saints, including the third bishop of Antioch (who was thrown to wild beasts by emperor Trajan) and Saint Ignatius of Lo ...

with its type locality given as the , Lugar Nuevo,

Andújar Andújar () is a Spanish municipality of 35,619 people (2024) in the province of Jaén, in Andalusia. The municipality is divided by the Guadalquivir River. The northern part of the municipality is where the Natural Park of the Sierra de And� ...

, Spain. Some authorities continue to classify this species, and '' S. alburnoides'', in the genus ''Iberocypris'', both taxa being the result of hybridisation between '' S. pyrenaicus'' and an unknown related fish taxa. However, ''

Eschmeyer's Catalog of Fishes Catalog of Fishes is a comprehensive on-line database and reference work on the scientific names of fish species and genera. It is global in its scope and is hosted by the California Academy of Sciences. It has been compiled and is continuously up ...

'' now classifies this species in the genus ''

Squalius ''Squalius'' is a genus of freshwater ray-finned fish belonging to the family (biology), family Leuciscidae, the daces, Eurasian minnows and reklated fishes. The fishies in this genus are found in Europe and Asia. Hybrid (biology), Hybridization ...

'', commonly referred to as chubs, which belongs to the

subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zo ...

Leuciscinae Leuciscinae is a subfamily of freshwater Actinopterygii, ray-finned fishes belonging to the Family (biology), family Leuciscidae, which includes the fishes known as daces, chubs, shiners and minnows. The fishes in this subfamily are mainly found i ...

of the family Leuciscidae.

Etymology

''Squalius palaciosi'' 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 ''Leuciscus'' is a genus of freshwater and brackish water ray-finned fishes belonging to the family Leuciscidae, which includes the daces, Eurasian minnows and related species. They are inland water fishes commonly called Eurasian daces. Th ...

'' for the Italian chub (''

Squalius cephalus ''Squalius cephalus'', the common chub, European chub or simply chub, is a species of freshwater ray-finned fish belonging to the family Leuciscidae, the daces, Eurasian minnows and related fishes. This species is found in Europe where it freq ...

''), inserting and additional "i" to prevent homonymy with the spurdog genus ''

Squalus ''Squalus'' is a genus of dogfish sharks in the family (biology), family Squalidae. Commonly known as spurdogs, these sharks are characterized by smooth dorsal fin spines, teeth in upper and lower fish jaw, jaws similar in size, caudal peduncle ...

''. In

classical Latin Classical Latin is the form of Literary Latin recognized as a Literary language, literary standard language, standard by writers of the late Roman Republic and early Roman Empire. It formed parallel to Vulgar Latin around 75 BC out of Old Latin ...

the chub and the spurdog were

homonyms In linguistics, homonyms are words which are either; ''homographs''—words that mean different things, but have the same spelling (regardless of pronunciation), or ''homophones''—words that mean different things, but have the same pronunciatio ...

as ''squalus''. An alternative explanation was that the name is a latinisation of ''squaglio'', a vernacular name for the Italian chub in Rome and its environs. The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

, ''palaciosi'', is an

eponym An eponym is a noun after which or for which someone or something is, or is believed to be, named. Adjectives derived from the word ''eponym'' include ''eponymous'' and ''eponymic''. Eponyms are commonly used for time periods, places, innovati ...

, honouring Fernando Palacios Arribas of the Museo Nacional de Ciencias Naturales in Madrid in recognition of his studies of Spanish vertebrates.

Distribution and habitat

''Squalius palaciosi'' was endemic to

Andalusia Andalusia ( , ; , ) is the southernmost autonomous communities of Spain, autonomous community in Peninsular Spain, located in the south of the Iberian Peninsula, in southwestern Europe. It is the most populous and the second-largest autonomou ...

in Spain where it was found only in the Jándula and Rumblar rivers, right handed tributaries of the

Guadalquivir River The Guadalquivir (, also , , ) is the fifth-longest river in the Iberian Peninsula and the second-longest river with its entire length in Spain. The Guadalquivir is the only major navigability, navigable river in Spain. Currently it is navigable ...

. This species preferred stretches of river or stream with a current, a stony or rocky bed and abundant aquatic vegetation.

Extinction

''Squalius palaciosi'' has not been recorded since the late 1990s. Damming and the introduction of non-native invasive species are thought to be the main reasons for it becoming extinct.

Sources

{{Taxonbar, from=Q50407468, from2=Q2700523 palaciosi Leuciscinae Endemic fauna of Spain Freshwater fish of Europe Fish described in 1980 Taxonomy articles created by Polbot Taxa named by Ignacio Doadrio Villarejo Habitats Directive species