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Genus Cassida

green tortoise beetle - Cassida rubiginosa Cassida rubiginosa - Thistle Tortoise Beetle? - Cassida rubiginosa Cassida piperata Cassida Rubiginosa - Cassida rubiginosa ?? - Cassida piperata Cassida rubiginosa? - Cassida rubiginosa Cassida rubiginosa ? - Cassida rubiginosa Cassida rubiginosa ? - Cassida rubiginosa
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 Cassidinae (Tortoise Beetles and the Hispines)
Tribe Cassidini (Tortoise Beetles)
Genus Cassida
Explanation of Names
Cassida Linnaeus 1758
5 spp. in our area, of which only C. relicta is indigenous to NA; >430 spp. total, arranged in 14 subgenera (of questionable validity)(1)(2)
Old World group, except for the presumably holarctic C. flaveola (northern transcontinental in NA) and C. relicta, restricted to Midwestern & s.-c. US; other adventive spp. of Palaearctic origin are now established across much of Canada and n. US (C. rubiginosa also intentionally introduced to VA); the European C. azurea has been introduced in MB-AB to control bladder campion(1)(2)(3)(4)
fields, meadows, parks, lawns & gardens, waste places
larvae and adults from spring through fall
very wide variety of plants; spp. adventive in NA feed on Amaranthaceae, Asteraceae (thistles, knapweeds), Caryophyllaceae, Chenopodiaceae(1)
Life Cycle
one generation per year; overwinters as an adult in leaf litter
Works Cited
1.Cassidinae of the world - an interactive manual (by Lech Borowiec and Jolanta Świętojańska)
2.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.
3.Annotated list of the leaf beetles (Coleoptera: Chrysomelidae) of Kentucky: Subfamily Cassidinae
Barney R.J., Clark S.M., Riley E.G. 2007. J. Kentucky Acad. Sci. 68: 132-144.
4.Introduced leaf beetles of the Maritime Provinces 7: Cassida rubiginosa Müller and Cassida flaveola Thunberg...
C.G. Majka & L. Lesage. 2008. Zootaxa 1811: 37–56.