Episomus

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Episomus
Episomus turritus by OpenCage.jpg
Episomus turritus
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Infraorder: Cucujiformia
Family: Curculionidae
Tribe: Episomini
Genus: Episomus
Schönherr, 1823
Type species
Curculio avarus
Fabricius, 1801
Diversity
About 106 species
Synonyms
  • EpizomusKono, 1928
  • SimallusPascoe, 1865

Episomus is a genus of beetles belonging to the family Curculionidae. Species are distributed throughout Sri Lanka, India, Myanmar, Thailand, Malay Peninsula, Sumatra, Java, Borneo, Philippines, China and Japan. [1] [2] Many species are considered economically important, as they are pests of field beans, cotton and pigeon pea.

Contents

Description

Body variable in size and shape generally elongate, broad, and ovate. Vestiture varies from brown or metallic green. Some species are greenish or black. Three kind of scales are present: the predominant usually oval and the less predominant ones more elongate or plumose. Dorsum of many species is brown. Head with a central furrow and a more or less distinct transverse impression behind the eye. Eyes are convex, lateral, prominent, and very short ovate. Scrobes are very deep in front, but shallower near the eyes. Rostrum broader than the forehead. Mandibles obtuse, prominent and with a strongly marked scar. Antennae with scape exceeding the hind margin of the eye. Antennae geniculate and consist of a scape, a seven segmented funicle. [2]

Prothorax usually with strong transverse plications and a more or less distinct central furrow. Prothorax base is either bisinuate or subtruncate. Scutellum variable, and usually well developed. Elytra not soldered together and with or without a distinct humeral angle. Elytral base slightly covering the basal margin of the prothorax. Legs stout, and elongate with unarmed femora. [3] Epistome forming a sharp acute angle behind. Sternum with the fore coxae nearer the anterior margin of the prosternum. Ventrum varied with light brown, grey with white, black or metallic green. [2]

Species

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References

  1. ↑ "Episomus Schönherr, 1823". www.gbif.org. Retrieved 2021-08-18.
  2. 1 2 3 Shanas, S.; Ramamurthy, V. V. (January 2009). "A study on the oriental weevil genus Episomus (Coleoptera: Curculionidae)". Oriental Insects. 43: 77–154. doi:10.1080/00305316.2009.10417580. S2CID   83673090 . Retrieved 2021-08-18.
  3. ↑ "THE FAUNA OF BRITISH INDIA, INCLUDING CEYLON AND BURMA: COLEOPTERA. RHYNCHOPHORA :-CURCULIONIDaE" (PDF). faunaofindia. Retrieved 2021-08-15.
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