Gymnusini
Heer, 1839
Genus Guides
2Gymnusini is a basal tribe of rove beetles in the Aleocharinae, established in 1839. A 2017 revision synonymized the tribe Deinopsini under Gymnusini, expanding it to eight including both extant and extinct . Members are associated with riparian . The tribe includes the fossil genera Cretodeinopsis and Electrogymnusa.
Pronunciation
How to pronounce Gymnusini: /dʒɪmˈnuːsɪnaɪ/
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Identification
Gymnusini can be distinguished from other aleocharine tribes by their basal phylogenetic position and associated morphological characters. The 2017 revision that synonymized Deinopsini established diagnostic features uniting these , though specific characters require examination. Extinct members are known from Cretaceous and Eocene amber deposits.
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Habitat
Riparian ; associated with moist environments near water bodies.
Distribution
Worldwide distribution including southern United States, Florida, Maryland, Brazil, Colombia, Panama, and Mexico. Fossil are known from Cretaceous and Eocene deposits.
Similar Taxa
- Other Aleocharinae tribesGymnusini is distinguished by its basal position in the ; most other tribes occupy more derived phylogenetic positions with corresponding morphological differences.
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Taxonomic History
The tribe was substantially revised in 2017 when Deinopsini was synonymized under Gymnusini, more than doubling the number of included . This revision recognized Gymnusini as a containing eight genera: Adinopsis, Allodinopsis, Cretodeinopsis (extinct), Deinopsis, Electrogymnusa (extinct), Gymnusa, Metadeinopsis, and Stylogymnusa.