A new species of Liolaemus related to L. nigroviridis from the Andean highlands of Central Chile (Iguania, Liolaemidae)

Troncoso-Palacios, Jaime; Elorza, Álvaro A.; Puas, German I.; Alfaro-Pardo, Edmundo

doi:10.3897/zookeys.555.6011

Cited by 8 publications

(16 citation statements)

References 34 publications

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“…Almost all sampled populations were recovered in a supported clade, with L. uniformis placed within the L. nigroviridis clade. Liolaemus uniformis was described from one locality (Laguna Chepical, 32°15′S, 70°30′W), and the analysis of the phylogeny included sequences from 37 Liolaemus species, with 11 sequences of L. nigroviridis from the locality of Farellones [31]. These taxa were inferred as sister species.…”

Section: Discussionmentioning

confidence: 99%

“…Morphological descriptions and analyses were also performed including other species from the L. nigroviridis group to support the new proposed taxon. L. nigroviridis and L. uniformis were reported to be sympatric, with significant differences in a few morphological characters [31]. The phylogenetic placement of L. uniformis within the L. nigroviridis clade may be explained by several processes including mitochondrial introgression, coalescent stochasticity, imperfect taxonomy, inadequate phylogenetic information, paralogy, hybridization, the taxon sampling effect and incomplete lineage sorting [68][69][70][71][72].…”

Section: Discussionmentioning

confidence: 99%

“…The species used were L. nigroviridis, L. uniformis, L. monticola, and L. nitidus. Other species included were L. confusus, L. curicensis, L. lemniscatus, L. tenuis, L. pseudolemniscatus, L. schroederi and L. chiliensis based on phylogenetic studies with mitochondrial and nuclear genes [31,39,41]. Due to a deep phylogeographic structure reported for L. nigroviridis [27], we added 14 sequences from a new locality (La Campana, 32°57′S, 71°07′W).…”

Section: Specimens Analyzedmentioning

confidence: 99%

“…To assess interspecific relationships of Liolaemus species focusing on L. nigroviridis and L. monticola and to determine changes in the topologies with different numbers of sequences, we performed Maximum-likelihood (ML) and Bayesian analyses using three approaches: 1) Eleven Liolaemus species (114 haplotypes Phylogenetic reconstructions were rooted with the outgroup criterion, using L. chiliensis and L. schroederi for all Lioalemus species included in this study (first approach), L. lemniscatus for analyses with L. nigroviridis as focal species (second approach), and L. confusus and L. curicensis for L. monticola as focal species [31,39,41] (third approach). Outgroups used for second and third approaches were based in the phylogenetic relationships resulting from the first approach (see results).…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

“…However, based on similarities in morphology and chromosomal characters, a subsequent study did not recognize the polytypic status of the species [30]. A new species was described recently in central Chile, Liolaemus uniformis, sister to L. nigroviridis [31]. The phylogenetic inference for the description of L. uniformis included L. nigroviridis from one population, the type locality Farellones (33°21′S, 70°17′W).…”

Section: Introductionmentioning

confidence: 99%

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Molecular phylogenetic analyses reveal the importance of taxon sampling in cryptic diversity: Liolaemus nigroviridis and L. monticola (Liolaeminae) as focal species

Torres-Pérez

Boric-Bargetto

Rodríguez-Valenzuela

et al. 2017

Rev. Chil. de Hist. Nat.

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Background: Mitochondrial markers are widely used as a first approach in determining evolutionary relationships among vertebrate taxa at different hierarchical scales. Cytochrome b and cytochrome oxidase I are among the most common markers; they are particularly useful in phylogeography and species delineation studies. Simulation and empirical studies show that increasing the taxon sampling has a clear and strong effect on the accuracy of the inferred trees and therefore on hypothesized phylogenetic relationships (and eventually in new taxonomic rearrangements); this should be considered in the design of studies. The lizard genus Liolaemus is widely distributed in southern South America and includes more than 250 described species. The number of taxa and the distribution of Liolaemus species/populations makes them a good model for testing different hypotheses in systematics. Methods: We studied two Liolaemus species, Liolaemus nigroviridis and L. monticola as focal species to evaluate their monophyly and the influence of adding new samples from related taxa in the resulting phylogenies. We performed phylogenetic analyses (maximum likelihood and Bayesian inference) using 141 sequences of the mitochondrial DNA Cytochrome b (cyt-b) of 11 Liolaemus species. Results: Our study show that using intensive taxon sampling for phylogenetic reconstructions, two species (L. uniformis and L. nitidus) are placed within the clades of the two focal species (L. nigroviridis and L. monticola, respectively). Conclusions: Our study confirms the importance of taxon sampling to infer more accurate phylogenetic relationships, particularly to reveal hidden polyphyly or paraphyly, which may have a strong impact on taxonomic proposals and/or inferring cryptic diversity.

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Section: Discussionmentioning

confidence: 99%