2025/11/14 by Q. W. Wei, Lei Cao, Xiaoxiao He +10 · 1 voice
Earth and Planetary Sciences · Mathematics · Biochemistry, Genetics and Molecular Biology · #Evolution and Paleontology Studies #Morphological variations and asymmetry #Genomics and Phylogenetic Studies
paper · doi:10.1111/jse.70029
openalex publication_date 2025/11/14 · openalex created_date 2025/11/14 · openalex updated_date 2026/07/28
Abstract Weasels represent the most widely distributed and diverse lineage within the family Mustelidae. They have experienced adaptive radiation and have long been the subject of significant taxonomic debates. This study undertakes a comprehensive study of this group, employing morphological measurements, mitochondrial genomes, nuclear genes, and single copy orthologs extracted from whole genome data. Based on the outcomes of phylogenetic tree construction using orthologous genes, it is ultimately verified that the genera Mustela and Neogale are independent genera, thereby resolving the controversy regarding the species they encompass. Through molecular systematics and morphological studies, a putative Mustela species collected from Mabian Dafengding National Nature Reserve in Sichuan is confirmed as a new species, designated Mustela mopbie sp. nov. This new species exhibits molecular phylogenetic affinity with M . altaica and M. nivalis , yet shares morphological similarities with M. kathiah , M . nivalis and M. aistoodonnivalis . Notably, it is considerably smaller than these species and possesses distinctive body coloration and tail morphology. This study provides a detailed description of this new species and demonstrates that larger datasets yield more robust phylogenetic signal. Furthermore, we observed substantial incongruence between mitochondrial and nuclear gene trees, suggesting potential genomic introgression between this new species and its closely related congeners ( M . altaica and M . nivalis ).