Exechia
Winnertz, 1863
fungus gnats
Species Guides
1Exechia is a diverse of small fungus gnats in the Mycetophilidae, containing over 180 described . The genus is widespread in the Holarctic Region, with limited records from Afrotropical and Oriental regions. Larvae develop within fruit-bodies of macrofungi, while are notable for their hibernation and exceptional freeze .
Pronunciation
How to pronounce Exechia: /ɛkˈsiːkiə/
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Habitat
Larvae develop in fruit-bodies of macrofungi. hibernate in caves, under bark of conifers, or in hollow, usually broken umbelliferous stems.
Distribution
Widespread in the Holarctic Region; largely unknown in Afrotropical and Oriental Regions. Records include North-Western Europe, North America, East Africa, South Africa, Madagascar, Japan, Nepal, and Bhutan. Each is typically restricted to a single zoogeographical region.
Seasonality
hibernate through winter, indicating activity.
Diet
Larval development occurs in fruit-bodies of a wide range of macrofungi.
Host Associations
- macrofungi - larval development sitefruit-bodies
- caves - hibernation site
- conifer bark - hibernation site
- umbelliferous stems - hibernation sitehollow, usually broken stems used for
Life Cycle
Larval development takes place in macrofungal fruit-bodies. hibernate through winter. High freeze has been demonstrated, with E. nugatoria surviving temperatures to -32°C.
Behavior
hibernate in sheltered microhabitats including caves, under conifer bark, and in hollow umbelliferous stems. exhibit high freeze adapted to low winter temperatures.
Ecological Role
Larvae contribute to decomposition and nutrient cycling through their development in fungal fruit-bodies.
More Details
Species diversity
The contains more than 180 described , with significant undescribed diversity remaining. The Exechia parva group alone includes 33 species, of which 24 were newly described in a 2021 revision.
Biogeographic patterns
within the Exechia parva group show strong zoogeographic structure, with each species restricted to a single zoogeographical region and largely congruent with major biogeographic divisions.