Geographic distribution of Phalloceros Eigenmann, 1907 (Cyprinodontiformes, Poeciliidae) in the Ilha Grande Bay Hydrographic Region, Rio de Janeiro, Brazil

Souto-Santos, Igor Cavalcanti de Araújo; Ferraro, Gustavo; Jennings, W. Bryan; Vergara, Gabriela Lucia da Silva; Buckup, Paulo Andreas

doi:10.15560/15.1.181

Cited by 9 publications

(10 citation statements)

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“…A previous broad ichthyological inventory of the region did not provide catalog numbers nor pictures of the material examined (Bizerril & Primo 2001), which limits identification and distribution discussions. Other publications provide reliable records, but focused on restricted taxa (Costa 2004;Medeiros et al 2022;Souto-Santos et al 2019) or restricted drainages (Guimarães et al 2021).…”

Section: Discussionmentioning

confidence: 99%

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The freshwater fishes from the Costa Verde Fluminense region of southeastern Brazil

Dopazo¹,

Souto-Santos²,

Britto³

et al. 2023

Biota Neotrop.

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The region between the Brazilian Shield and the Atlantic Ocean is characterized by the presence of numerous hydrographic basins isolated by mountainous terrain that flow directly into the ocean without forming wide coastal plains. However, knowledge about the diversity and distribution of freshwater fish in several coastal areas is still incipient. One of these areas is the Costa Verde Fluminense region, situated between the municipalities of Mangaratiba and Paraty in the Brazilian State of Rio de Janeiro. In order to eliminate the gap of knowledge about the freshwater fish fauna of this region, we prepared a list of the species, and dichotomous identification keys and illustrations of all species. We examined material from expeditions carried out between 1942 and 2019, deposited in the Ichthyological Collection of the Museu Nacional, Universidade Federal do Rio de Janeiro, Brazil. The material comes from 29 continental coastal rivers and four drainages on Ilha Grande island. We recognized 54 fish species belonging to 16 families and 9 orders. The order Siluriformes was the most diverse with 18 species, followed by Characiformes with 14 species, Cyprinodontiformes with 10 species, Cichliformes with four species, Gobiiformes with three species, Syngnathiformes with two species, and Gymnotiformes, Salmoniformes and Synbranchiformes with one species each. These records include two putative undescribed species and four introduced species. Phalloceros anisophallos was the most widely distributed species, recorded in 24 drainages. More than a half (52 %) of the native species occur exclusively in coastal streams, demonstrating the importance of the area for biogeographic and conservation studies.

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Section: Discussionmentioning

confidence: 99%

“…Morphological characters originally used by Lucinda (2008) to distinguish P. enneaktinos from P. harpagos are variable, and there is overlap in the number of dorsal-fin rays of the two species. These species were recognized through DNA barcodes (Souto-Santos et al 2019).…”

Section: Discussionmentioning

confidence: 99%

The freshwater fishes from the Costa Verde Fluminense region of southeastern Brazil

Dopazo¹,

Souto-Santos²,

Britto³

et al. 2023

Biota Neotrop.

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“…These species occur in coastal drainages from the southern portion of the Brazilian State of Bahia to Uruguay, and westward to the La Plata drainage in Argentina and Paraguay, and to the Tocantins‐Araguaia basin (Lucinda & Reis, 2005; Lucinda, 2008; Souto‐Santos et al ., 2023). Most species occur in southern Brazil, where half of the species are found (Lucinda, 2008; Souto‐Santos et al ., 2019; Thomaz et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

Bilateral genital asymmetry in livebearer fishes of the genus PhallocerosEigenmann, 1907, with description of a new species from coastal drainages of southern Brazil (Cyprinodontiformes: Poeciliidae)

Souto-Santos

Lucinda

Buckup

2023

Journal of Fish Biology

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A new species of Phalloceros is described from the Tijucas, Maruim, Aririú, Cubatão do Sul, Rio da Madre, D'Una and Tubarão river basins in southern Brazil. The new species is diagnosed among congeners by the bilateral asymmetry of a hood‐like structure located immediately anterior to the urogenital papilla of females. The hood is fused with the urogenital papilla on the right side, but free from the papilla on the left side. This hood is reported for the first time in the genus and is present in six of the 21 valid species of Phalloceros, but its bilateral asymmetry is an exclusive condition of the new species. These species do not constitute a monophyletic group. The new species is likely to be phylogenetically related to P. caudimaculatus, whose females have a symmetrical hood.

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“…Within this family, Phalloceros Eigenmann 1907 comprises 21 valid species that are widely distributed along the southern and southeastern river basins of South America, and it is the genus of Poeciliidae with the greatest species richness on this continent (Souto‐Santos, Lucinda, & Buckup, 2023). Most Phalloceros species show a general pattern of allopatric and endemic distribution (Lucinda, 2008; Souto‐Santos et al, 2019; Thomaz et al, 2019), and co‐occurring species generally represent non‐sister groups, suggesting strong incompatibility of sexual traits and historical episodes of secondary sympatry in the evolutionary diversification of the genus (Thomaz et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Unlike most species of the genus, P. harpagos Lucinda, 2008 has an extended and sympatric distribution with other Phalloceros species, occurring in the Paraná–Paraguay river basins and coastal basins of the region extending from the state of Espírito Santo to the state of Santa Catarina, and being in sympatry with seven other species of Phalloceros , including P. leptokeras Lucinda, 2008, P. reisi Lucinda, 2008 in the Paraíba do Sul River basin, P. malabarbai Lucinda, 2008 and P. pellos Lucinda, 2008 in some coastal drainage basins in the states of Santa Catarina and Paraná, respectively (Lucinda, 2008; Thomaz et al, 2019), and P. anisophallos Lucinda, 2008 in the coastal drainage basins of Ilha Grande Bay in Rio de Janeiro (Souto‐Santos et al, 2019). Specimens from different populations of P. harpagos vary by colouration patterns, the distal tip of the gonopodium (the hook), and certain body proportions (Lucinda, 2008).…”

Section: Introductionmentioning

confidence: 99%

Hidden diversity and evolutionary diversification in Phalloceros harpagos Lucinda (Cyprinodontiformes: Poeciliidae)

Oliveira

Diamante

Fabrin

et al. 2023

Ecology of Freshwater Fish

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The distribution of Phalloceros species is generally allopatric and restricted; however, Phalloceros harpagos has a wide distribution and exhibits morphological variation among populations from different Brazilian river basins. Different species delimitation tests using cytochrome C oxidase subunit I gene sequences indicated that P. harpagos is a species complex that comprises between 7 and 9 phylogroups. The separation of the Paraná and Paraíba do Sul River basins most likely caused the diversification of these phylogroups in the Miocene period. The majority of phylogroups have a narrow distribution; however, one phylogroup has a broad distribution, being found primarily in the Paraná, Ribeira de Iguape, and Iguaçu River basins. This distribution can be attributed to possible headwater capture events caused by the reactivation of faults and erosion in the quaternary. Estimates about the times of divergence based on molecular data could be used to infer the biogeographic processes related to the diversification of South American freshwater fish.

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Geographic distribution of Phalloceros Eigenmann, 1907 (Cyprinodontiformes, Poeciliidae) in the Ilha Grande Bay Hydrographic Region, Rio de Janeiro, Brazil

Cited by 9 publications

References 9 publications

The freshwater fishes from the Costa Verde Fluminense region of southeastern Brazil

The freshwater fishes from the Costa Verde Fluminense region of southeastern Brazil

Bilateral genital asymmetry in livebearer fishes of the genus PhallocerosEigenmann, 1907, with description of a new species from coastal drainages of southern Brazil (Cyprinodontiformes: Poeciliidae)

Hidden diversity and evolutionary diversification in Phalloceros harpagos Lucinda (Cyprinodontiformes: Poeciliidae)

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