Apolygus

China, 1941

Species Guides

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Apolygus is a large trans-Palearctic of plant bugs (Miridae: Mirinae) comprising approximately 74 , with greatest diversity in Asia. The genus was established by China in 1941 and includes economically important agricultural pests, particularly A. lucorum and A. spinolae. Species delimitation within the genus is taxonomically challenging due to morphological similarities, requiring integrative approaches combining and molecular markers.

20170722 Apolygus lucorum Lohja Finland Petro Pynnönen by Petro Pynnönen. Used under a CC BY-SA 4.0 license.Apolygus lucorum (2008-06-13) by Entomart. Used under a Attribution license.Apolygus lucorum 1 by Sandy Rae. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Apolygus: //æˈpɒlɪɡəs//

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Identification

identification within Apolygus requires integrative taxonomic approaches. A. lucorum and A. spinolae are morphologically very similar and cannot be reliably distinguished using the standard COI barcoding region. The nuclear marker ITS1 has been identified as the most reliable marker for species delimitation and identification. A. lucorum was historically confused with multiple species (A. malaisei, A. nigronasutus, A. nigrovirens) that have been synonymized with A. spinolae. A. limbatus may represent two cryptic species based on morphological and COI phylogenetic data, though this requires further investigation.

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Distribution

Trans-Palearctic distribution with greatest diversity in Asia. Fifteen have been recorded from Russia, including trans-Palearctic species A. limbatus, A. lucorum, and A. spinolae. A. gotorum and A. subhilaris have been newly reported from Russia. A. shikotan was described from Shikotan in the Kuril Islands.

Ecological Role

A. lucorum and A. spinolae are economically important agricultural pests. A. lucorum exhibits phytozoophagous feeding , combining plant feeding with facultative on phytophagous insects including of Helicoverpa armigera, nymphs of Aphis gossypii, and nymphs of Bemisia tabaci.

Human Relevance

A. lucorum is a major agricultural pest causing serious damage to various crops including cotton, fruit trees, and jujube (Ziziphus jujuba), resulting in substantial economic losses. Its and mesophyll-feeding habits contribute to its pest status. The has been investigated for potential use in of other pests due to its predatory , though its predominantly phytophagous nature limits practical application.

Similar Taxa

  • LygusBoth are within Miridae with similar body plans; Apolygus was historically separated from Lygus based on genitalic characters, requiring careful examination of male parameres and female genital structures for distinction.

More Details

Genomic Resources

A - reference (1.02 Gb) has been assembled for A. lucorum, representing the first sequenced genome in the Miridae. The genome contains 17 chromosomes and shows expansions of genes associated with digestion, chemosensory perception, and detoxification, contributing to the ' environmental adaptability and pest status. A salivary polygalacturonase unique to mirid bugs has significantly expanded in A. lucorum, potentially contributing to leaf damage.

Taxonomic History

Recent taxonomic revision synonymized A. lucorum, A. malaisei, A. nigronasutus, and A. nigrovirens with A. spinolae based on morphological and molecular data showing no consistent differences. The synonymy of A. syringae with A. hilaris was also supported.

Sources and further reading