ArticleInsects2026
Unveiling Weevil Diversity Drivers and Cryptic Species on the Qinghai-Xizang Plateau.
Article in Insects, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Understanding patterns and mechanisms of species diversity is one fundamental issue in biogeography and ecology. As a critical region for biodiversity, the Qinghai-Xizang Plateau (QXP) still has unclear distribution patterns and drivers for cryptic, understudied taxa such as Curculionoidea. Here, we collected the distribution data of Curculionoidea on the QXP to analyze their diversity patterns and influencing factors, and compiled a DNA barcode dataset to uncover cryptic diversity. This comprehensive dataset encompasses 671 Curculionoidea species across 223 genera, demonstrating a level of diversity that surpasses that of certain vertebrate groups. We also observed an unbalanced biogeographic pattern of diversity, with a concentration of species in the eastern and southern regions and a scarcity in the northern and central areas of QXP. Further analysis showed that the elevation range is the most important factor influencing the diversity of Curculionoidea. In addition, based on 1147 COI-5' barcode sequences from 217 species, we found that 11 morphological species may contain cryptic species based on DNA barcode datadset. Our findings significantly enhance the current understanding of cryptic biodiversity patterns among understudied taxa in the QXP, while simultaneously highlighting persistent knowledge gaps in characterizing the plateau's full ecological complexity.
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