Dryotribini
Genus Guides
6Dryotribini is a tribe of weevils within the Cossoninae of the Curculionidae. The tribe contains approximately 60 described distributed across multiple continents. Members of this tribe are generally small, cryptic weevils associated with dead or decaying plant material. The group has been documented in both temperate and tropical regions, with notable diversity in the Pacific islands and New Zealand.
Pronunciation
How to pronounce Dryotribini: /dɹaɪ.əˈtɹɪ.bɪ.niː/
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Identification
Dryotribini can be distinguished from other Cossoninae tribes by a combination of rostral and antennal characters, though precise diagnostic features require examination of individual . The tribe generally includes small, slender weevils with elongate rostra. Many genera exhibit reduced or modified . Definitive identification to tribe level typically requires dissection and reference to specialized taxonomic keys for Cossoninae.
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Habitat
within Dryotribini are predominantly associated with dead wood, decaying plant material, and fungal substrates. Many are found in forest litter, under bark, or in rotting vegetation. Some species have been recorded from palm debris and other monocotyledonous plant remains. The tribe includes species adapted to subantarctic island environments.
Distribution
Documented from North America, South America, Africa, Asia, Australia, New Zealand, and numerous Pacific islands including subantarctic islands. The tribe shows a broad circumtropical and southern temperate distribution pattern.
Similar Taxa
- CossoniniAnother tribe in Cossoninae; Dryotribini differs in rostral structure and antennal insertion, though separation requires detailed morphological examination
- PentarthriniClosely related tribe within Cossoninae with similar ; distinguished by tarsal and rostral characters
More Details
Taxonomic History
The tribe has undergone significant revision, with many transferred between tribes within Cossoninae. Kuschel's 1964 work on subantarctic Curculionidae and subsequent catalogues by Alonso-Zarazaga and Lyal (1999) have stabilized much of the current generic classification.
Notable Genera
The Caulophilus contains economically significant stored product pests, including Caulophilus oryzae (the broad-nosed grain weevil), though this has been variously placed in different tribes historically.