4.5 Article

Uncovering hidden diversity within the Euwallacea fornicatus species complex in China

Journal

ENTOMOLOGIA GENERALIS
Volume 42, Issue 4, Pages 631-639

Publisher

E SCHWEIZERBARTSCHE VERLAGSBUCHHANDLUNG
DOI: 10.1127/entomologia/2022/1234

Keywords

genetic diversity; shot hole borer; invasive species; forest pest; molecular species delimitation

Categories

Funding

  1. National Key R&D Program of China [2017YFC0505706]
  2. Natural Science Foundation of Shanghai [19ZR1451300]
  3. Key Project of Science and Technology Commission of Shanghai Municipality [19DZ1204102]
  4. DFG
  5. USDA Forest Service
  6. U.S. Department of Agriculture - Animal and Plant Health Inspection Service
  7. National Science Foundation
  8. USDA Agricultural Research Service, Systematic Entomology Laboratory

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Accurate species delimitation is crucial for pest management. This study used molecular approaches to explore the genetic diversity of the Euwallacea fornicatus complex, revealing the presence of different species and clades in China. The distribution patterns and genetic diversity of these species contribute to the development of effective control strategies.
Accurate species delimitation is an important component of pest management. The Euwallacea fornicatus spe-cies complex (Coleoptera: Curculionidae: Scolytinae) includes a series of morphologically similar forest pests that cause huge economic losses both in invaded regions and in the native region. The current hypothesis about the species complex postulates the existence of four species: E. fornicatus (Eichhoff), E. fornicatior (Eggers), E. kuroshio Gomez and Hulcr, and E. perbrevis (Schedl). To test the current hypothesis and reveal the diversity in China, we explored the genetic diver-sity of the Euwallacea fornicatus complex using molecular approaches. Species and clades were delimited (using ABGD, bGMYC, mPTP and BP&P approaches) based on mitochondrial COI and 16S, and nuclear 18S-ITS1-5.8S, 28S and CAD. All specimens from continental China were E. fornicatus, consistently separating into three molecular taxonomic. Of the other species, E. perbrevis was recovered from Hainan. The distribution pattern and genetic diversity of these species con-tributes to the development of adequate control strategies since different species can cause different damage.

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