Two New<i>Chaetostoma</i>Group (Loricariidae: Hypostominae) Sister Genera from Opposite Sides of the Andes Mountains in Ecuador, with the Description of One New Species

Lujan, Nathan K.; Meza‐Vargas, Vanessa; Barriga-Salazar, Ramiro

doi:10.1643/ci-15-246

Cited by 11 publications

(14 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Alternative tree topologies hypothesized by Lujan et al . (,b) were evaluated in the program treefinder (Jobb et al . ) using the Shimodaira and Hasegawa (SH) test (Shimodaira & Hasegawa ), the Approximately Unbiased (AU) test (Shimodaira ) and the Expected Likelihood Weights (ELW) method (Strimmer & Rambaut ).…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, physical connections and slopes between and within these habitats shift in response to geomorphic processes. Phylogenies of freshwater fishes often reflect these events (Smith 1981;Hocutt & Wiley 1986;Mayden 1988;Lundberg et al 1998;Cardoso et al 2012;Lujan et al 2015a;Tagliacollo et al 2015). Indeed, geomorphological processes involving both the division of previously contiguous populations and the passive geodispersal of species between drainages have been linked to freshwater fish speciation and diversification both theoretically and empirically (Grant et al 2007;Muneepeerakul et al 2008;Winemiller et al 2008;Bertuzzo et al 2009;Albert & Crampton 2010).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transcontinental dispersal, ecological opportunity and origins of an adaptive radiation in the Neotropical catfish genus Hypostomus (Siluriformes: Loricariidae)

et al. 2016

Self Cite

View full text Add to dashboard Cite

Ecological opportunity is often proposed as a driver of accelerated diversification, but evidence has been largely derived from either contemporary island radiations or the fossil record. Here, we investigate the potential influence of ecological opportunity on a transcontinental radiation of South American freshwater fishes. We generate a species-dense, time-calibrated molecular phylogeny for the suckermouth armored catfish subfamily Hypostominae, with a focus on the species-rich and geographically widespread genus Hypostomus. We use the resulting chronogram to estimate ancestral geographical ranges, infer historical rates of cladogenesis and diversification in habitat and body size and shape, and test the hypothesis that invasions of previously unoccupied river drainages accelerated evolution and contributed to adaptive radiation. Both the subfamily Hypostominae and the included genus Hypostomus originated in the Amazon/Orinoco ecoregion. Hypostomus subsequently dispersed throughout tropical South America east of the Andes Mountains. Consequent to invasion of the peripheral, low-diversity Paraná River basin in southeastern Brazil approximately 12.5 Mya, Paraná lineages of Hypostomus, experienced increased rates of cladogenesis and ecological and morphological diversification. Contemporary lineages of Paraná Hypostomus are less species rich but more phenotypically diverse than their congeners elsewhere. Accelerated speciation and morphological diversification rates within Paraná basin Hypostomus are consistent with adaptive radiation. The geographical remoteness of the Paraná River basin, its recent history of marine incursion, and its continuing exclusion of many species that are widespread in other tropical South American rivers suggest that ecological opportunity played an important role in facilitating the observed accelerations in diversification.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transcontinental dispersal, ecological opportunity and origins of an adaptive radiation in the Neotropical catfish genus Hypostomus (Siluriformes: Loricariidae)

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…Species included in Transancistrus have a naked snout border, and species of Chaetostoma have a larger naked surface, mainly towards the dorsoanterior region of snout, in all species of these two genera there is no mention or report of the presence of any kind of odontodes, on naked areas of snout (Rapp Py-Daniel, 1991;Ceas & Page, 1996;Lasso & Provenzano, 1997;Salcedo, 2003Salcedo, , 2006aSalcedo, ,b, 2013Ballen, 2011;Tan & Armbruster, 2012;Salcedo & Ortega, 2015;Lujan, et al 2015c;Ballen, et al 2016). Species of Andeancistrus have a snout totally covered with plates, but lack enlarged odontodes, and A. platycephalus has keels on lateral body plates (Lujan, et al 2015a). The analyzed external characters, seem to indicate that the new species is closer to species allocated in the genus Cordylancistrus.…”

Section: Discussionmentioning

confidence: 99%

A new species of the catfish genus Cordylancistrus (Siluriformes, Loricariidae) from the Sierra Nevada de Santa Marta, Colombia

Milani

2017

Zootaxa

1,493

View full text Add to dashboard Cite

As a part of an assessment of loricariid catfishes inhabiting the Andes of Colombia, specimens belonging to an interesting new species were identified. The new species is described herein, and it is tentatively included in the genus Cordylancistrus. The new species can be easily distinguished among its congeners by the presence of a unique diagnostic character: a fleshy keel or excrescence, black or dark brown, over the posterior tip of supraoccipital. Specimens of the new species were captured in rivers of the Sierra Nevada de Santa Marta and the Sierra de Perijá that drain to the Magdalena River Basin and Caribbean Sea. The occurrence of one species of Cordylancistrus in the Sierra Nevada de Santa Marta could have interesting biogeographic implications for hypotheses related to the geological history of northwestern corner of South America or to the dispersal or vicariance models used to explain biogeographical patterns of related species in Colombia.

show abstract

“…All of the genera that inhabit mountain rivers are found in a single clade of informal rank within the subfamily Hypostominae; this group has been called the Chaetostoma clade (Lujan et al ., 2015a, 2015b). It is composed of the genera Andeancistrus Lujan, Meza‐Vargas & Barriga‐Salazar, Chaetostoma Tschudi, Cordylancistrus Isbrücker, Dolichancistrus Isbrücker, Leptoancistrus Meek & Hildebrand and Transancistrus Lujan, Meza‐Vargas & Barriga‐Salazar, which concentrate their diversity in the Andean system with a few exceptions in the genus Chaetostoma that also enter Central America and the Guiana Shield (Lujan et al ., 2015a, 2015c).…”

Section: Introductionmentioning

confidence: 99%

A new species of Chaetostoma (Siluriformes: Loricariidae) from the Orinoco basin with comments on Amazonian species of the genus in Colombia

Urbano-Bonilla

Ballen

2021

Journal of Fish Biology

View full text Add to dashboard Cite

Chaetostoma chimu sp. nov. is described from 119 specimens collected in the Andean foothills of the Orinoco River in Colombia. The new species can be distinguished from congeners by a combination of characters, including shape of cheek odontodes, presence of a supraoccipital excrescence, sexual dimorphism characters and colour pattern. In addition, this species can be distinguished from the sympatric and geographically close congeners of the Orinoco that have curved cheek odontodes (i.e., Chaetostoma anale, Chaetostoma formosae and Chaetostoma joropo), by presenting a generally larger orbital diameter and interorbital distance, details of sexual dimorphism and colour pattern. The type locality of specimens collected by Kjell von Sneidern in the mid‐twentieth century in the Colombian Amazon is also clarified. Chaetostoma alternifasciatum and Chaetostoma vagum are proposed as junior synonyms of C. anale. An identification key for the species of Chaetostoma from cis‐Andean drainages in Colombia is provided. The new species is herein categorized as Vulnerable (Vu) B1a (i, iii), following the IUCN criteria.

show abstract

Two NewChaetostomaGroup (Loricariidae: Hypostominae) Sister Genera from Opposite Sides of the Andes Mountains in Ecuador, with the Description of One New Species

Cited by 11 publications

References 13 publications

Transcontinental dispersal, ecological opportunity and origins of an adaptive radiation in the Neotropical catfish genus Hypostomus (Siluriformes: Loricariidae)

Transcontinental dispersal, ecological opportunity and origins of an adaptive radiation in the Neotropical catfish genus Hypostomus (Siluriformes: Loricariidae)

A new species of the catfish genus Cordylancistrus (Siluriformes, Loricariidae) from the Sierra Nevada de Santa Marta, Colombia

A new species of Chaetostoma (Siluriformes: Loricariidae) from the Orinoco basin with comments on Amazonian species of the genus in Colombia

Contact Info

Product

Resources

About