期刊
JOURNAL OF ZOOLOGICAL SYSTEMATICS AND EVOLUTIONARY RESEARCH
卷 53, 期 4, 页码 300-311出版社
WILEY
DOI: 10.1111/jzs.12099
关键词
Cryptic species; mammals; Mesoamerica; mitochondrial DNA; peromyscines
资金
- Consejo Nacional de areas Protegidas in Guatemala City
- Ministerio de Medio Ambiente y Recursos Naturales in San Salvador
- Museum of Vertebrate Zoology (National Science Foundation) [DEB1026396]
- CONACyT [101861]
- Papiit [IN217910, IN219707]
- Program for Postgraduate Studies (PAEP), UNAM
- Direccion General de Investigacion USAC
- Direct For Biological Sciences
- Division Of Environmental Biology [1026393] Funding Source: National Science Foundation
The mountain mice of the Peromyscus mexicanus group currently encompass six known species; however, the limits between species remain uncertain, with two considered monotypic and the other four having multiple associated subspecific names. Based on the most comprehensive sampling of the group throughout its distribution in Nuclear Central America, we used data of the mitochondrial cytochrome b gene to assess its genetic diversity, phylogeny, and main biogeographic and diversification patterns. Our mitochondrial phylogeny only partially reflects the current taxonomy of the group, in agreement with some of the taxonomically recognized species. Specifically, our phylogenetic results show that the group is highly structured, including four main clades with genetic distances ranging from 11 to 8.6%. A remarkable level of differentiation is found at a more local level, defined as 15 different lineages with high nucleotide and haplotype diversity (=0.068, h=0.99), and with divergence and genetic distance values (p-uncorrected=9.9-2.4%; K2P=10.8-3.0%) similar to values observed between species within Peromyscus. Accordingly, we propose that the reference name P.mexicanus is polyphyletic and should be restricted to the mountains of central Mexico west of the Isthmus of Tehuantepec. We suggest to limit the other five recognized specific names to equal number of lineages, as monophyletic, and to revalidate three junior synonyms: Peromyscus salvadorensis, P.nicaraguae and P.tropicalis. The Isthmus of Tehuantepec, the Motagua-Polochic-Jocotan fault system, the Maya Highlands and the Honduras Depression are examples of geographic features that are likely associated with the differentiation of main lineages. Some other lineages may represent candidate species, hence the need to review the taxonomic status of the entire P.mexicanus group.
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