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.
Literature:
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.
©2011