Synonyms and other taxonomic changes
First described in 1915 by William T. Davis
as Cicada cultriformis
Explanation of Names
From Latin culter- "knife, plowshare" + forma- "form, shape, appearance"
According to Davis: "But the greatest differences are in the lower pieces [of the male genitalia] into which the uncus locks, which are 5 millimeters long in cultriformis, and when seen in profile are shaped like the blade of a pruning knife, hence the name."
Replaces the T. dealbatus-pronotalis group in the arid Southwest
Well known from Arizona and northern Mexico.
Reported from the following: Arizona, w. New Mexico, s. Colorado, and w. Texas* (reports from w. TX are not confirmed & remain suspect/unlikely?)
*NOTE: Some cultriformis reports may be based on the similar looking T. dealbatus, which may be duller in coloration across parts of its southwestern range - incl. TX, NM, and CO).
Arroyos and river basins
Flood plain "forests" of the southwest & usu. associated with ecosystems plentiful in Cottonwoods, Willows, and Sycamore (+ adj./associated Hardwood forests and grasslands)
It is thought this species (much like the related taxa - pronotalis & dealbatus) seems to prefer sycamores (Plantanaceae), cottonwoods & willows (Salicaceae)
Also reported from, but less commonly associated with, misc. other flood plain hardwoods.
eggs usually laid in dead twigs, wood or bark
(occasionally eggs may be laid in living stems and twigs)
eggs hatch and nymphs burrow into the soil
nymphs feed on the sap in roots for several years (prefer Pines)
Final instar nymphs emerge and develop into winged adults (emergence for this species usu. occurs at night)
Appears to be most closely related to T. pronotalis & T. dealbatus