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Subfamily Cryptocephalinae - Case-bearing Leaf Beetles

Megalostomis dimidiata Lacordaire - Megalostomis dimidiata chrysomelid from Ceratiola ericoides - Pachybrachis Megalostomis subfasciata? - Megalostomis subfasciata poo-house bug - Neochlamisus Case-bearing Leaf Beetle - Saxinis Pachybrachis? - Pachybrachis Cryptocephalus Scriptured Leaf Beetle in the genus Pachybrachis? - Pachybrachis
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 Cryptocephalinae (Case-bearing Leaf Beetles)
Other Common Names
Cylindrical Leaf Beetles
Explanation of Names
Cryptocephalinae Gyllenhal 1813
~350 spp. in 22 genera in our area(1), close to 4,000 spp. worldwide(2)
Compact, subcylindrical to subglobose; head inserted into the prothorax
Larvae live in litter on soil surface(1) or on the leaves of host plant (they drop to the ground when threatened)(3)
Larvae mostly detritivorous, a few consume green leaves(1)
Life Cycle
Larvae are casebearers, living in and protected by a case constructed of their fecal matter and sometimes plant debris. The case is shorter than the larva that remains folded inside it.(1)
Eggs are laid in carefully sculpted packets formed from feces and abdominal secretions (S.M. Clark's comment):
Chrysomelids with long, thread-like antennae belong to Cryptocephalinae, but not all Cryptocephalinae have such antennae(4)
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.Chrysomelid males with enlarged mandibles: three new species and a review of occurrence in the family (Coleoptera:Chrysomelidae)
Reid C.A.M., Beatson M. 2013. Zootaxa 3619: 79–100.
3.Borror and DeLong's Introduction to the Study of Insects
Norman F. Johnson, Charles A. Triplehorn. 2004. Brooks Cole.
4.Coleoptera or Beetles east of the Great Plains
Edwards, J. Gordon. 1949. Edwards Brothers, Ann Arbor, MI. 181 pp.
5.Chamorro M.L. (2011) Cryptocephalinae of the World