Pachymerini
Bridwell, 1929
Genus Guides
2- Caryedon(pea and bean weevils)
- Pachymerina
Pachymerini is a tribe of seed beetles ( Chrysomelidae, Bruchinae) established by Bridwell in 1929. Members are primarily associated with legume seeds as . The tribe includes several of economic importance due to their seed-feeding habits.
Pronunciation
How to pronounce Pachymerini: //ˌpækɪməˈraɪnaɪ//
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Identification
Pachymerini can be distinguished from other bruchine tribes by the structure of the male genitalia, particularly the form of the lobe and internal sac . Members generally have a more robust body form compared to some other bruchine tribes, with the often showing reduced .
Images
Distribution
Tropical and subtropical regions worldwide, with strongest representation in the Americas, Africa, and Asia. Distribution closely follows that of their legume plants.
Diet
Larvae feed internally within seeds, primarily of Fabaceae (legumes). may feed on pollen or not feed at all.
Host Associations
- Fabaceae - larval Primary ; larvae develop inside seeds
Ecological Role
As seed , members play a role in regulating plant and influencing seed bank dynamics. Some may facilitate seed through their activity.
Human Relevance
Several are significant agricultural pests of stored legumes, including beans and peas. Pachymerus species in particular are known pests in Africa and elsewhere.
Similar Taxa
More Details
Taxonomic History
The tribe has undergone significant taxonomic revision, with moved in and out based on phylogenetic studies. Current composition reflects molecular and morphological analyses.