Brood XXIII (13-year)
The Lower Mississippi Valley Brood
Brood XXIII has a close relationship with Brood XIX. Brood XXIII contains populations of M. neotredecim but does not show as strong a pattern of reproductive character displacement as Brood XIX. An odd, isolated population of Brood XXIII is found in DeWitt County, IL.
Blue symbols on the map above were generated from verified records in the Cicada Central Database on 17 March 2012. The database is not exhaustive, and this map is intended to portray only an approximate, present-day distribution.
Magenta symbols on the map are based on previously published maps (Marlatt 1923; Simon 1988) and unpublished data. However, these records have not been field checked.
A project is currently underway to make new maps of periodical cicada broods. See the Magicicada mapping project homepage.
Literature:
Marlatt, C. 1923. The Periodical Cicada. United States Department of Agriculture, Bureau of Entomology Bulletin 71.
Simon, C. 1988. Evolution of 13- and 17-year periodical cicadas. Bulletin of the Entomological Society of America 34:163-176.
©2012