- Habronattus calcaratus calcaratus
- Habronattus calcaratus maddisoni
- Habronattus calcaratus agricola
Three subspecies are recognized: H. c. calcaratus from the extreme southeastern U.S. is delicate and brightly marked; H. c. maddisoni from eastern Canada and the northeast and east central U.S. is large, robust, smoothly and darkly marked; H. c. agricola from the prairies is much like H. c. maddisoni but bears a white stripe across the face. Superficially, the two northern subspecies resemble H. jucundus while the southern subspecies resembles H. notialis.
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Tree of Life Web Project. 1995. Habronattus calcaratus. Version 01 January 1995 (under construction). http://tolweb.org/Habronattus_calcaratus/3982/1995.01.01 in The Tree of Life Web Project, http://tolweb.org/