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— Huesos infraorbitarios de las especies ibéricas de Squalius. Lc: hueso lacrimal; Inf II: Segundo hueso infraorbitario; Inf III: Tercer hueso infraorbitario; Inf IV: Cuarto hueso infraorbitario; Inf V: Quinto hueso infraorbitario. A: Squalius castellanus; B: Squalius pyrenaicus; C: Squalius carolitertii.
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A new species of Squalius is described on the basis of morphological and genetic characters from the Gallo River and its tributaries (Tagus Basin) in central Spain. The new species is distinguished from other Iberian Squalius species by a combination of morphometric, meristic and genetic characters, such as wide infraorbital bones that do not cover...
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Citations
... Posterior probability (pp) values were used to assess the reliability of the phylogenetic hypothesis. The accuracy of the Maximum Likelihood with the different proportions of the head (Table 2) as occur in other Iberian species of the genus Squalius (Doadrio, 1988;Doadrio & Carmona, 2006;Doadrio et al., 2007aDoadrio et al., , 2007b. The length and height of the caudal peduncle was not as decisive in the ordination of the populations as in other morphological studies of Squalius species (Doadrio & Carmona, 2006). ...
Se describen dos nuevas especies, Squalius gaditanus sp. nov. y Squalius tartessicus sp. nov. sobre la base de caracteres morfológicos y genéticos. Squalius gaditanus está restringida a las cuencas de Barbate, Jara y Miel en la provincia de Cádiz (sur de España). Squalius gaditanus sp. nov. se puede distinguir de otras especies del género Squalius, de la Península Ibérica, a través de una combinación de caracteres morfométricos, merísticos y genéticos: 36-40 (x̄=38) escamas canaliculadas en la línea lateral; 6-7 (x̄=6.7) escamas por encima de la línea lateral; 2-3 (x̄=2,8) escamas debajo de la línea lateral; vértebras 37-39 (x̄=38); en los ejemplares adultos el segundo infraorbitario es más estrecho que el tercero; maxilar con su proceso anterior poco puntiagudo; proceso posterior del maxilar largo y delgado; la rama inferior del hueso faríngeo es corta y robusta; placa faríngea del basioccipital redondeada y dos autapomorfias en el gen mitocondrial citocromo b. Squalius tartessicus sp. nov. vive en las cuencas de los ríos Almargem, Gilao, Odiel, Guadiana, Guadalquivir, Guadalete, Guadalhorce, Vélez, Guadalfeo y Segura en el sur de la Península Ibérica. Squalius tartessicus sp. nov. se puede distinguir de otras especies del género Squalius, de la Península Ibérica,a través de una combinación de caracteres morfométricos, merísticos y genéticos; 37-41 (x̄=38.8), escamas canaliculadas en la línea lateral; 6-7 (x̄=7) escamas por encima de la línea lateral; 2-3 (x̄=2.9) escamas por debajo de la línea lateral; 37-39 (x̄=38) número de vértebras; en los adultos infraorbitarios excepcionalmente anchos; maxilar con la apófisis anterior puntiaguda; apófisis posterior del maxilar larga y delgada; la apófisis inferior del hueso faríngeo es corta y robusta; placa faríngea del basioccipital de forma triangular; lámina posterior de cleitro extendida.
... Especie descrita en el año 2007, en base al análisis de caracteres morfométricos y de la secuencia que codifica para el gen citocromo b del ADN mitocondrial. El holotipo (MNCN 212727) y una serie de paratipos, procedentes de los ríos Gallo y Arandilla, fueron depositados en el Museo Nacional de Ciencias Naturales de Madrid (Doadrio et al., 2007). ...
... Ocho radios ramificados en la aleta dorsal y siete u ocho en la anal. Veinte autoapomorfias identificadas en el gen citocromo b del ADN mitocrondial (posiciones= 101, 179, 302, 332, 434, 464, 494, 497, 503, 616, 722, 747, 755, 861, 878, 896, 905, 938, 1088 y 1100), cinco de ellas transversiones (Doadrio et al., 2007(Doadrio et al., , 2011. ...
... Pedúnculo caudal ancho. Aleta caudal grande, con 18 radios (Doadrio et al., 2007). ...
... Phylogenetic reconstruction was performed (1,Dragonja;2,Raša;3,Pazinčica;4,Mirna;5,Boljunšćica;6,Ričica;7,Zrmanja;8,Krka;9,Visovac;10,Cetina;11,Ruda;12,Prološko Blato;13,Vrljika;14,Krupa;15,Neretva at Metković;16,Hutovo Blato;17,Trebišnjica;18,Ravno field;19,Konavočica;20,Drava). using the newly obtained sequences, and GenBank sequences of various Squalius species (Supporting Information, Table S3; Almodovar et al., 2012, Doadrio et al., 2007, Ketmaier et al., 2004, because our aim was to confirm the position of the Adriatic populations among other Squalius species. Datasets comprising the same species were analysed based on both nuclear genes, for comparison. ...
Fish of the genus Squalius inhabit various freshwater habitats across Europe and Asia, with a particularly high diversity in the Mediterranean area, but the taxonomic status of many populations is still a matter of debate. This study aims to resolve the taxonomic uncertainties of chubs distributed in the Adriatic basin of Croatia and Bosnia and Herzegovina. Phylogenetic reconstruction based on the mitochondrial gene for cytochrome b and two nuclear genes, the recombination activating gene 1 and the rhodopsin gene, reveal high diversity of chubs in the investigated area. Two evolutionary independent groups are revealed: the first comprising the species Squalius illyricus, S. microlepis, S. svallize, S. tenellus and S. zrmanjae, and a second group corresponding with S. squalus. Genetic distinctiveness of species belonging to different groups is high due to their divergence that began in the Middle Miocene. In addition to allopatric speciation as the main force of divergence of Adriatic Squalius species, several instances of natural hybridizations were detected, contributing to the observed diversity. A comparison of phylogenetic scenarios using Bayesian factors corroborated the molecular basis for recognition of six Squalius species in the Adriatic basin, while Squalius janae is confirmed to be a junior synonym of S. squalus.
... Phylogenetic reconstruction was performed (1,Dragonja;2,Raša;3,Pazinčica;4,Mirna;5,Boljunšćica;6,Ričica;7,Zrmanja;8,Krka;9,Visovac;10,Cetina;11,Ruda;12,Prološko Blato;13,Vrljika;14,Krupa;15,Neretva at Metković;16,Hutovo Blato;17,Trebišnjica;18,Ravno field;19,Konavočica;20,Drava). using the newly obtained sequences, and GenBank sequences of various Squalius species (Supporting Information, Table S3; Almodovar et al., 2012, Doadrio et al., 2007, Ketmaier et al., 2004, because our aim was to confirm the position of the Adriatic populations among other Squalius species. Datasets comprising the same species were analysed based on both nuclear genes, for comparison. ...
Fish of the genus Squalius inhabit various freshwater habitats across Europe and Asia, with a particularly high diversity in the Mediterranean area, but the taxonomic status of many populations is still a matter of debate. This study aims to resolve the taxonomic uncertainties of chubs distributed in the Adriatic basin of Croatia and Bosnia and Herzegovina. Phylogenetic reconstruction based on the mitochondrial gene for cytochrome b and two nuclear genes, the recombination activating gene 1 and the rhodopsin gene, reveal high diversity of chubs in the investigated area. Two evolutionary independent groups are revealed: the first comprising the species Squalius illyricus, S. microlepis, S. svallize, S. tenellus and S. zrmanjae, and a second group corresponding with S. squalus. Genetic distinctiveness of species belonging to different groups is high due to their divergence that began in the Middle Miocene. In addition to allopatric speciation as the main force of divergence of Adriatic Squalius species, several instances of natural hybridizations were detected, contributing to the observed diversity. A comparison of phylogenetic scenarios using Bayesian factors corroborated the molecular basis for recognition of six Squalius species in the Adriatic basin, while Squalius janae is confirmed to be a junior synonym of S. squalus.
... Phylogenetic reconstruction was performed (1,Dragonja;2,Raša;3,Pazinčica;4,Mirna;5,Boljunšćica;6,Ričica;7,Zrmanja;8,Krka;9,Visovac;10,Cetina;11,Ruda;12,Prološko Blato;13,Vrljika;14,Krupa;15,Neretva at Metković;16,Hutovo Blato;17,Trebišnjica;18,Ravno field;19,Konavočica;20,Drava). using the newly obtained sequences, and GenBank sequences of various Squalius species (Supporting Information, Table S3; Almodovar et al., 2012, Doadrio et al., 2007, Ketmaier et al., 2004, because our aim was to confirm the position of the Adriatic populations among other Squalius species. Datasets comprising the same species were analysed based on both nuclear genes, for comparison. ...
Fish of the genus Squalius inhabit various freshwater habitats across Europe and Asia, with a particularly high
diversity in the Mediterranean area, but the taxonomic status of many populations is still a matter of debate. This
study aims to resolve the taxonomic uncertainties of chubs distributed in the Adriatic basin of Croatia and Bosnia and
Herzegovina. Phylogenetic reconstruction based on the mitochondrial gene for cytochrome b and two nuclear genes,
the recombination activating gene 1 and the rhodopsin gene, reveal high diversity of chubs in the investigated area.
Two evolutionary independent groups are revealed: the first comprising the species Squalius illyricus, S. microlepis,
S. svallize, S. tenellus and S. zrmanjae, and a second group corresponding with S. squalus. Genetic distinctiveness of
species belonging to different groups is high due to their divergence that began in the Middle Miocene. In addition
to allopatric speciation as the main force of divergence of Adriatic Squalius species, several instances of natural
hybridizations were detected, contributing to the observed diversity. A comparison of phylogenetic scenarios using
Bayesian factors corroborated the molecular basis for recognition of six Squalius species in the Adriatic basin, while
Squalius janae is confirmed to be a junior synonym of S. squalus.
... S. pyrenaicus is widely distributed in southern Spain, including the Guadalquivir Basin, but in the Mediterranean region is present only in the Segura Basin and some single streams of the Ebro Basin (Doadrio et al., 1991). Previous studies of Squalius pyrenaicus also found Segura haplotypes clustered with Guadalquivir haplotypes, which reinforces the idea of a secondary contact between Guadalquivir and Segura basins (Doadrio, Perea, & Alonso, 2007). ...
Since the Cenozoic Era, the southern Iberian Peninsula has undergone a series of complex geological and climatic changes that have shaped the hydrographic configuration of the freshwater network, influencing the present-day distribution of primary freshwater species and favoring a high level of local endemicity. The cyprinid species Luciobarbus sclateri (Günther, 1968) is an endemic species confined to the southern Iberian Peninsula and characterized by a complex evolutionary history. Previous studies linked the structure of L. sclateri populations to the effects of climate change during glaciations and were not able to explain the genetic discordance found between nuclear and mitochondrial markers. The results of this study show that the structure of L. sclateri populations is a reflection of diversification processes linked to the geological history of the region. Thus, we found three main mitochondrial phylogroups: the first one corresponding to small basins in southern Iberian Peninsula, a second one in eastern Iberian Peninsula, corresponding to Segura population, and a third one including the rest of the basins where the species is distributed. The southern group began diverging in the Pliocene as result of tectonic dynamics characterized by the emersion of the basins around the Strait of Gibraltar. The other two groups began diverging with the formation of the current Iberian hydrographic system during Pleistocene. So, the isolation of the hydrographic basins was the main factor driving intraspecific differentiation, followed by recent secondary contacts, admixture, and re-isolation of the populations.
... All morphometric measurements were performed using digital callipers. Measurements and counts followed [62] and included standard length (SL), head length (HL), eye diameter (ED), interorbital width (IW), preorbital length (PrOL), postorbital length (PosOL), pre-dorsal distance (PrDD), pre-pectoral distance (PrPD), pre-ventral distance (PrPV), pre-anal distance (Fig 2). ...
Hybridization and incomplete lineage sorting are common confounding factors in phylogeny
and speciation resulting in mitonuclear disparity. Mitochondrial introgression, a particular
case of hybridization, may, in extreme cases, lead to replacement of the mitochondrial
genome of one species with that of another (mitochondrial capture). We investigated mitochondrial
introgression involving two species of the cyprinid genus Squalius in the western
Peloponnese region of Greece using molecular and morphological data. We found evidence
of complete mitochondrial introgression of Squalius keadicus into two populations recognized
as Squalius peloponensis from the Miras and Pamissos River basins and a divergence
of mitochondrial genomes of S. keadicus from the Evrotas basin from that of the
introgressed populations dating from the Pleistocene. Secondary contact among basins is a
possible factor in connection of the species and the introgression event. Morphological analyses
support the hypothesis of mitochondrial introgression, as S. keadicus was different
from the other three populations recognized as S. peloponensis, although significant differences
were found among the four populations. Isolation by geographical barriers arose during
Pleistocene in the western Peloponnese were the source of the evolution of the two
reciprocally monophyletic subclades found in the S. keadicus mitochondrial clade, and
the morphological differences found among the four populations. Along with the lack of
structure in the nuclear genome in the three populations ascribed to S. peloponensis, this
suggests an incipient speciation process occurring in these Squalius species in the western
Peloponnese.
... Phylogenetic reconstruction was performed (1,Dragonja;2,Raša;3,Pazinčica;4,Mirna;5,Boljunšćica;6,Ričica;7,Zrmanja;8,Krka;9,Visovac;10,Cetina;11,Ruda;12,Prološko Blato;13,Vrljika;14,Krupa;15,Neretva at Metković;16,Hutovo Blato;17,Trebišnjica;18,Ravno field;19,Konavočica;20,Drava). using the newly obtained sequences, and GenBank sequences of various Squalius species (Supporting Information, Table S3; Almodovar et al., 2012, Doadrio et al., 2007, Ketmaier et al., 2004, because our aim was to confirm the position of the Adriatic populations among other Squalius species. Datasets comprising the same species were analysed based on both nuclear genes, for comparison. ...
The genus Squalius comprises more than 40 species inhabiting various freshwater habitats. They are distributed in Europe and Asia, with particularly high diversity recorded in the Mediterranean area. The taxonomic status of many populations is still matter of debate. With this investigation we aimed to help in resolving taxonomic uncertainties of the chubs distributed in the Adriatic basin in Croatia and Bosnia and Herzegovina. Phylogenetic reconstruction based on mitochondrial gene for cytochrome b revealed high diversity of chubs in the investigated area. Two evolutionary independent lineages are revealed: the first one comprising species Sq. svallize, Sq. tenellus, Sq. illyricus and Sq. zrmanjae; whereas the second lineage corresponds with Sq. squalus. High intraspecific structuring of Sq. squalus was detected, implying necessity of taxonomic revision of that species. Based on the obtained results, most important aspects of the evolutionary history of the genus Squalius in the Adriatic basin will be discussed and evolutionary significant units identified.
... The distances are of similar range as those between well recognized species of cyprinid fishes (Doadrio et al., 2002(Doadrio et al., , 2007a(Doadrio et al., , 2007bDoadrio & Carmona, 2003, 2006Doadrio & Madeira, 2004;Robalo et al., 2005;Doadrio & Elvira, 2007;Domínguez-Domínguez et al., 2007, 2009). These results confirm the differences found with allozyme analyses . ...
The genus Luciobarbus in Morocco presents high diversification, in contrast to the generally impoverished freshwater fish fauna from North Africa. Within Morocco the northern area is one of the least studied territories, due to both its historical background and the limited accessibility of many regions. Previous phylogenetic studies identified Luciobarbus populations that are morphologically and genetically differentiated, to the same extent as others already recognized as separate species. The aim of this work is to describe these populations as distinct species, based on morphological, meristic, and genetic traits.
urn:lsid:zoobank.org:pub:8FC4B423-104C-4097-A468-ED3D2664A15AEn Marruecos el género Luciobarbus está altamente diversificado, en comparación con la empobrecida fauna de peces de agua dulce del norte de África. Dentro de Marruecos la región norte es una de las áreas menos estudiadas, por motivos históricos y también por la poca accesibilidad en algunas de sus regiones. Los estudios filogenéticos previos para esta área han señalado la existencia de poblaciones pertenecientes al género Luciobarbus tan diferenciadas morfológica y genéticamente como otras que ya habían sido reconocidas como diferentes especies. En este trabajo describimos estas poblaciones como diferentes taxa, en base a caracteres morfológicos, merísticos y genéticos.
... This species has a silvery yellowish body with up to 200 mm TL, presents 39-42 scales in the lateral line, 7 scales above the lateral line and 3 scales below the lateral line (Doadrio et al., 2007). Contrasting to the remaining Squalius species, S. castellanus has eight branched rays in the dorsal and anal fins, a wide third infraorbital bone, and a pharyngeal teeth formula of 5+2/5+2 (Doadrio et al., 2007). ...
... This species has a silvery yellowish body with up to 200 mm TL, presents 39-42 scales in the lateral line, 7 scales above the lateral line and 3 scales below the lateral line (Doadrio et al., 2007). Contrasting to the remaining Squalius species, S. castellanus has eight branched rays in the dorsal and anal fins, a wide third infraorbital bone, and a pharyngeal teeth formula of 5+2/5+2 (Doadrio et al., 2007). S. castellanus diverged from its sister species Squalius carolitertii in the Pliocene, about 3.8 My ago (Doadrio et al., 2007). ...
... Contrasting to the remaining Squalius species, S. castellanus has eight branched rays in the dorsal and anal fins, a wide third infraorbital bone, and a pharyngeal teeth formula of 5+2/5+2 (Doadrio et al., 2007). S. castellanus diverged from its sister species Squalius carolitertii in the Pliocene, about 3.8 My ago (Doadrio et al., 2007). ...
