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Species Chelymorpha cassidea - Argus Tortoise Beetle

Beetle? - Chelymorpha cassidea What genus and species? - Chelymorpha cassidea Chelymorpha - ? - Chelymorpha cassidea Too big for Ladybug - Chelymorpha cassidea Argus Tortoise Beetle - Chelymorpha cassidea Newly morphed Tortoise Beetle? - Chelymorpha cassidea Chelymorpha cassidea? - Chelymorpha cassidea Chelymorpha cassidea
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 Mesomphaliini
Genus Chelymorpha
Species cassidea (Argus Tortoise Beetle)
Other Common Names
Milkweed Tortoise Beetle (1) (inappropriate: milkweed is not a host) (2)
Synonyms and other taxonomic changes
Chelymorpha cassidea (Fabricius)
Orig. Comb: Coccinella cassidea Fabricius 1775
argus was suppressed (3)
Explanation of Names
cassid (L). 'helmet' (4)
Argus: a mythical 100-eyed monster
8-12 mm
generally six dots on pronotum and each elytron, one being on midline.
Spots variable:
e NA to CA (CA-FL-QC-AB) / W. Indies (3)(5)
Meadows, fields
May-Aug (mostly) (BG data)
Asso. w/ Convolvulaceae (other plant associations probably incidental) (2)
Life Cycle
Eggs laid in clusters of 15-30 on leaves. Larvae feed on leaves, carry frass on back. Overwinters as adult.
1: eggs. 2 and 3: larvae. 4: pupa. 5: adult
See Also
- Range: AZ-TX, KS(?) / Mex.
Chelymorpha phytophagica Crotch
Det. M. A. Quinn, 2013
Works Cited
1.A Manual of Common Beetles of Eastern North America
Dillon, Elizabeth S., and Dillon, Lawrence. 1961. Row, Peterson, and Company.
2.Host plants of leaf beetle species occurring in the United States and Canada
Clark et al. 2004. Coleopterists Society, Special Publication no. 2, 476 pp.
3.Catalog of Leaf Beetles of America North of Mexico
Ed Riley, Shawn Clark, and Terry Seeno. 2003. Coleopterists Society.
4.Dictionary of Word Roots and Combining Forms
Donald J. Borror. 1960. Mayfield Publishing Company.
5.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.