Integrative species delimitation in practice: Revealing cryptic lineages within the short-nosed skink Plestiodon brevirostris (Squamata: Scincidae)
| Autor: | Carlos J. Pavón-Vázquez, Uri Omar García-Vázquez, Norma L. Manríquez-Morán, Manuel Feria-Ortiz, Robert W. Bryson, Adrián Nieto-Montes de Oca |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Systematics Skink Time Factors Squamata Allopatric speciation Parapatric speciation DNA Mitochondrial 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Plestiodon Species Specificity RNA Ribosomal 16S Genetics Animals Mexico Molecular Biology Phylogeny Ecology Evolution Behavior and Systematics Geography biology Phylogenetic tree Reproducibility of Results Bayes Theorem Lizards biology.organism_classification Mitochondria 030104 developmental biology Genetic Loci Evolutionary biology Taxonomy (biology) |
| Zdroj: | Molecular Phylogenetics and Evolution. 129:242-257 |
| ISSN: | 1055-7903 |
| DOI: | 10.1016/j.ympev.2018.08.020 |
| Popis: | Integrative taxonomy has been generally considered as a goal in systematics for more than a decade. Here, we employed environmental, molecular, and morphological data to evaluate the species boundaries within the short-nosed skink Plestiodon brevirostris from south-central Mexico, one member of the morphologically conservative P. brevirostris group. Our molecular dataset includes one mitochondrial and two nuclear loci. The mitochondrial fragment includes the full length of the gene coding for the NADH dehydrogenase subunit 1 protein, a segment of the gene coding for 16S ribosomal RNA, and flanking tRNAs. The nuclear dataset includes fragments of the genes coding for the megakaryoblastic leukemia 1 and RNA fingerprint 35 proteins. We employed phylogenetic reconstruction, analyses of population structure and morphological variation, and species delimitation methods (including the integration of the three kinds of data in a unified probabilistic framework) to evaluate species limits. Our results suggest that P. brevirostris represents four distinct species. The information provided by each kind of data allowed us to discern between alternative explanations for the observed patterns of geographic structure. Two of the newly recognized lineages are poorly differentiated morphologically but apparently differ in environmental preferences and are allopatric. Additionally, one lineage is microendemic and parapatric with respect to another one. Moreover, our phylogenetic analyses suggest that other taxa within the P. brevirostris group may represent species complexes. We discuss our results in the context of integrative species delimitation. |
| Databáze: | OpenAIRE |
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