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subgenus Hypericia

Beetle - Chrysolina hyperici beetle - Chrysolina Chrysolina Leaf Beetle - Chrysolina Klamath Weed Beetle - Chrysolina quadrigemina - male Shiny Beetle - Chrysolina St Johnswort beetle - Chrysolina hyperici St. Johnswort beetle - Chrysolina hyperici
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Long-horned and Leaf Beetles)
Family Chrysomelidae (Leaf Beetles)
Subfamily Chrysomelinae
Tribe Chrysomelini
Subtribe Doryphorina
Genus Chrysolina
No Taxon subgenus Hypericia
Explanation of Names
Hypericia Bedel 1899
Numbers
2 spp. (both introduced) in our area(1), 14 total(2)
Identification
Two European species of quadrigemina/hyperici complex were released to control the invasive weed St.John's-wort (Hypericum perforatum); the two can be separated with certainty mostly from male genitalia. Ch. quadrigemina seems to be the dominant sp. in N. America, though; both sexes of this species are very shiny dorsally, while in Ch. hyperici, females are a bit opaque. --Boris Büche, 4.ix.2007
Ch. quadrigemina males (6.0-7.1 mm) have the apical ventral segment broadly and distinctly impressed; Ch. hyperici (5.3-6.1 mm) has the apical ventral segment not distinctly impressed. Most specimens of Chrysolina I've collected on St.John's Wort were Ch. quadrigemina. --John R. Watts, 22.vii.2008
Range
Palaearctic group ranging into n. Vietnam(1)(2)
Food
St. Johnswort, klamath weed (Hypericum perforatum L.), and other Hypericum species.
Internet References
Works Cited
1.American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea
Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). 2002. CRC Press LLC, Boca Raton, FL.
2.A study on the genus Chrysolina Motsch. 1860, with a checklist of all the described subgenera, species, subspecies, and synonyms
Bieńkowski A.O. 2001. Genus 12: 105-235.