Patchiella
Tullgren, 1925
Species Guides
1Patchiella is a of aphids in the Pemphiginae, established by Tullgren in 1925. The genus is distinguished by its obligate association with Tilia , where colonies form distinctive "leaf nests" by folding and binding leaves together. Members exhibit alternation, migrating between Tilia (primary host) and Araceae (secondary host) seasonally. The genus includes P. kolokasia, recently documented from South Korea, expanding its known range from China and Japan.
Pronunciation
How to pronounce Patchiella: //pæˈtʃi.ɛl.lə//
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Identification
Distinguished from other Pemphigini by the formation of "leaf nests" on Tilia—colonies fold and bind leaves together with wax secretions, creating enclosed shelters. Fundatrices (founding stem mothers) show morphological specializations for initiating these structures. Identification to level requires examination of fundatrix ; for P. kolokasia, detailed descriptions are available from South Korean specimens.
Images
Habitat
Associated with Tilia (limes/basswoods), where colonies occupy enclosed leaf nests formed by folding and binding leaf edges together. Secondary phase occurs on Araceae species.
Distribution
East Asia: China, Japan, and South Korea (first recorded from Gyeonggi-do, Korean Peninsula in 2025).
Diet
Phloem-feeding on Tilia (primary ) and Araceae (secondary host); specific plant tissues not documented.
Host Associations
- Tilia mandshurica - primary First South Korean record, Gyeonggi-do
- Tilia species - primary General for Patchiella
- Araceae - secondary alternation destination; specific not stated
Life Cycle
Heteroecous with alternation: fundatrices colonize Tilia in spring, inducing leaf nest formation; colonies produce that migrate to Araceae (secondary hosts) for summer ; autumn migrants return to Tilia to produce sexual morphs and . Exact timing and number of generations undocumented.
Behavior
Colonies construct "leaf nests" by folding Tilia leaves and binding edges with wax filaments, creating protected microhabitats. This is characteristic of the and distinguishes it from related aphids that form galls or remain exposed.
Similar Taxa
- PemphigusAlso in tribe Pemphigini and forms plant galls, but Patchiella constructs leaf nests on Tilia rather than true galls on Populus or other ; host association and nest structure differ
- ByrsocryptaRelated pemphigine ; Patchiella distinguished by Tilia-specific leaf nest formation and documented alternation to Araceae
More Details
Taxonomic history
established by Tullgren in 1925. P. kolokasia described by Qiao & Zhang in 1999; first Korean record published 2025 with detailed fundatrix .
Research significance
South Korean discovery represents first record for the country and extends known distribution to the Korean Peninsula, filling a geographic gap between Chinese and Japanese .