Periodical Cicadas







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Brood X (17-year)

The Great Eastern Brood

Some maps, such as the one below, show reports of Brood X in Missouri.

However, Marshall (2001) argues that many of these records are erroneous, and are the result of confusion following the 1868 co-emergence of Brood X and Brood XIX. Even though these broods contain different species with different life cycles, during this co-emergence, populations were mistakenly assigned to the wrong brood, because there was no reliable way to tell the species apart.

This map is intended to portray only an approximate, present-day brood distribution. It is based on previously published maps (Marlatt 1923). A project is currently underway to make new maps of periodical cicada broods. See the Magicicada mapping project homepage.
Lloyd, M., and J. A. White. 1976. Sympatry of Periodical Cicada Broods and the Hypothetical Four-Year Acceleration. Evolution 30:786-801.
Marlatt, C. 1923. The Periodical Cicada. United States Department of Agriculture, Bureau of Entomology Bulletin 71.
Marshall, D. C. 2001. Periodical cicada (Homoptera : Cicadidae) life-cycle variations, the historical emergence record, and the geographic stability of brood distributions. Annals Of The Entomological Society Of America 94:386-399.
Marshall, D. C., J. R. Cooley, R. D. Alexander, and T. E. Moore. 1996. New records of Michigan Cicadidae (Homoptera), with notes on the use of songs to monitor range changes. Great Lakes Entomologist 29:165-169.
Simon, C. 1988. Evolution of 13- and 17-year periodical cicadas. Bulletin of the Entomological Society of America 34:163-176.
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