Eustylini | |
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Compsus auricephalus | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Coleoptera |
Suborder: | Polyphaga |
Infraorder: | Cucujiformia |
Family: | Curculionidae |
Subfamily: | Entiminae |
Tribe: | Eustylini Lacordaire, 1863 |
Genera | |
See text |
Eustylini is a primarily Neotropical weevil tribe in the subfamily Entiminae. [1]
The tribe Eustylini was named for the first time by Jean-Baptiste Henri Lacordaire in 1863, [2] although, when first named, the tribe (Groupe Eustylides, p. 205) only contained three genera: Aptolemus (currently in Naupactini), Brachystylus, and Eustylus.
In 1986 the Eustylini contained most of its current genera, mostly due to revised taxonomic placements made by Guillermo Kuschel. [3] [1] The latest additions were made by Franz in 2012 by transferring former members of other tribes including Geonemini, Phyllobiini, and Tanymecini. [4]
The type species of some genera ( Compsus , Diaprepes , Eustylus , Exorides , and Exophthalmus ) were redescribed by Franz. [5] Most species of Eustylini are only known from their original descriptions. [6]
A diagnosis for the tribe was offered by Girón 2020: [6]
Medium to large weevils (approx. 10–25 mm); scale coverage highly variable in presence, density and coloration; iridescent scales, erect setae or waxy secretions are frequently present; surface smooth and even or strongly sculptured and irregular; head (including rostrum) subrectangular, nearly as long or longer than wide; eyes small to mid-sized, slightly dorsally positioned; frons usually as wide as or narrower than interantennal distance, often bearing median fovea; rostrum nearly parallel-sided or broadened apically; dorsal surface of rostrum with variable elevations or depressions, including longitudinal carinae or oblique fossae; antennal scrobe generally fully visible in dorsal view; nasal plate usually well developed, either depressed, flat or elevated regarding surface of rostrum; anterior margin of prothorax in lateral view straight, seldom slightly sinuate, never forming conspicuous postocular lobe; postocular setae may be present, if so, forming a fringe instead of a tuft; elytral shoulders usually well-developed, absent in Brachyomus, reduced in some Compsus and Exorides; tubercles and apical projections may be present on elytra; femora usually not toothed (except in some Eustylus).
— J.C. Girón, Status of knowledge of the broad-nosed weevils of Colombia (Coleoptera, Curculionidae, Entiminae).
Eustylini ranges from south-western USA to Argentina, with its highest diversity in the Caribbean, Central America and northern South America. [1] [3] [7]
The tribe Eustylini currently includes 25 genera and 339 sdescribed species: [3] [4]