Aphalaroidinae
Aphalaroidinae is a of within the Psyllidae. These are small sap-feeding commonly known as . The subfamily is distinguished by particular patterns and genitalic structures that separate it from other psyllid subfamilies. Members are associated with various plants, though specific associations remain incompletely documented for many .
Pronunciation
How to pronounce Aphalaroidinae: /æfəˌlærɔɪˈdɪniː/
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Identification
Distinguished from Psyllinae by details, particularly the arrangement of in the portion of the . Genitalic structures in both sexes provide definitive characters. Differs from other by the combination of wing shape, antennal structure, and tarsal segmentation.
Appearance
Small , generally 2-5 mm in length. with characteristic including a distinct and reduced or modified branching compared to other . Body typically somewhat flattened. with 10 . Hind legs modified for jumping with enlarged and .
Habitat
Associated with the foliage and young stems of plants. Found in diverse environments from temperate to tropical regions, wherever suitable host plants occur. Specific microhabitat preferences vary by and .
Distribution
Widespread distribution with records from multiple continents including North America, Europe, Asia, and Australia. Precise range limits poorly documented due to taxonomic revisions and limited survey effort.
Seasonality
activity generally coincides with periods of new growth. Timing varies by region and host association; many show spring or summer peaks in abundance.
Host Associations
- Eucalyptus - Several associated with Eucalyptus and related Myrtaceae in Australia
- Myrtaceae - broader -level association documented
Behavior
Strong jumpers, using modified hind legs to escape disturbance. and feed on phloem sap. Nymphs often produce waxy secretions and may develop on leaves or in sheltered locations on plants.
Ecological Role
Phloem feeders that may influence physiology; some are significant pests of cultivated plants. Serve as for various including , , and .
Human Relevance
Some are economically important as pests of plantation forestry, particularly Eucalyptus species. A few have been implicated in transmission of , though this is less well documented than for some other groups.
Similar Taxa
- PsyllinaeOverlapping distribution and general appearance; distinguished by and genitalic characters
- CacopsyllaFormerly included in Aphalaroidinae or confused with it; now generally placed in Psyllinae based on revised
More Details
Taxonomic instability
The of Aphalaroidinae has undergone significant revision. Many formerly placed here have been moved to other , and the current circumscription differs substantially from historical treatments. This complicates interpretation of older literature.
Host specificity
records in the literature require careful evaluation due to taxonomic changes; some records may apply to now classified in other .