Under threat: Two new troglobitic species of Girardia (Platyhelminthes: Tricladida) from sandstone and limestone caves in Brazil

Morais, Ana Laura; Bichuette, Maria Elina; Chagas-Júnior, Amazonas; Leal-Zanchet, Ana María

doi:10.1016/j.jcz.2021.06.015

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…This suggests that clade E comprises two new cave-dwelling species of Girardia . This recently discovered flourishing of hypogean Girardia species in Brazil (see Morais et al 2021) may be an indication that the genus is highly successful in adapting to life in caves and that future studies of those habitats in other regions in the Americas may unveil further diversity.…”

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

“…Since the most recent, more comprehensive account on species of Girardia from the South American continent and the Caribbean Region by Sluys et al (2005), 13 new species have been described (Chen et al 2015; Souza et al 2016; Souza et al 2015; Hellmann et al 2018, 2020; Lenguas Francavilla et al 2021; Morais et al 2021). Phylogenetic analyses of the genus Girardia are limited to the study of Sluys (2001), while historical biogeographic studies focusing on the genus are basically absent.…”

Section: Introductionmentioning

confidence: 99%

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First molecular phylogeny of the freshwater planarian genus Girardia (Platyelminthes, Tricladida) unveils hidden taxonomic diversity and initiates resolution of its historical biogeography

Benítez-Álvarez

Sluys

Leal-Zanchet

et al. 2022

Preprint

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The genus Girardia (Platyhelminthes: Tricladida) comprises several species of which some have spread from their original areas of distribution in the Americas to other parts of the globe. Due to great anatomical similarities between species, morphology-based phylogenetic analyses struggled to resolve the affinities between species and species-groups. This problem is exacerbated by the fact that populations of Girardia may show only asexual reproduction by fissiparity and, thus, do not exhibit a copulatory apparatus, which hampers taxonomic identification and extraction of phylogenetic characters. In the present work this problem has been resolved by constructing a molecular phylogeny of the genus. Although our samples do not include representatives of all known species, they cover a large part of the original distributional range of the genus Girardia. Our phylogenetic results suggest the presence of two main clades, which are genetically and karyologically highly differentiated. North and South American nominal G. tigrina actually constitute two sibling species that are not even closely related. The South American form is here described as a new species. The phylogenetic tree brings to light that Girardia arose on the South American portion of Gondwanaland, from which it, subsequently, dispersed to the Nearctic Region, probably more than once.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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First molecular phylogeny of the freshwater planarian genus Girardia (Platyelminthes, Tricladida) unveils hidden taxonomic diversity and initiates resolution of its historical biogeography

Benítez-Álvarez

Sluys

Leal-Zanchet

et al. 2022

Preprint

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Coarazuphium auleri sp. n. (Carabidae: Zuphiini), a new troglobitic ground-beetle in Central-Western Brazil

Pellegrini

Bichuette

Vieira

2021

Studies on Neotropical Fauna and Environment

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First molecular phylogeny of the freshwater planarian genusGirardia(Platyhelminthes: Tricladida) unveils hidden taxonomic diversity and initiates resolution of its historical biogeography

Benítez-Álvarez

Sluys

Leal-Zanchet

et al. 2022

Zoological Journal of the Linnean Society

View full text Add to dashboard Cite

The genus Girardia (Platyhelminthes: Tricladida) comprises several species of which some have spread from their original areas of distribution in the Americas to other parts of the globe. Due to great anatomical similarity between species, morphology-based phylogenetic analyses have struggled to resolve the affinities between species and species-groups. This problem is exacerbated by the fact that populations of Girardia may show only asexual reproduction by fissiparity and, thus, do not exhibit a copulatory apparatus, which hampers taxonomic identification of phylogenetic characters. In the present work, this problem has been resolved by constructing a molecular phylogeny of the genus. Although our samples do not include representatives of all known species, they cover a large part of the original distributional range of the genus Girardia. Our phylogenetic results suggest the presence of two main clades, which are genetically and karyologically highly differentiated. North and South American populations of G. tigrina actually constitute two sibling species that are not even closely related. The South American form is here described as a new species. The phylogenetic tree brings to light that Girardia arose on the South American portion of Gondwanaland, from which it, subsequently, dispersed to the Nearctic Region, probably more than once.

show abstract

Under threat: Two new troglobitic species of Girardia (Platyhelminthes: Tricladida) from sandstone and limestone caves in Brazil

Cited by 4 publications

References 14 publications

First molecular phylogeny of the freshwater planarian genus Girardia (Platyelminthes, Tricladida) unveils hidden taxonomic diversity and initiates resolution of its historical biogeography

First molecular phylogeny of the freshwater planarian genus Girardia (Platyelminthes, Tricladida) unveils hidden taxonomic diversity and initiates resolution of its historical biogeography

Coarazuphium auleri sp. n. (Carabidae: Zuphiini), a new troglobitic ground-beetle in Central-Western Brazil

First molecular phylogeny of the freshwater planarian genusGirardia(Platyhelminthes: Tricladida) unveils hidden taxonomic diversity and initiates resolution of its historical biogeography

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