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A Key to the superfamilies of the Lepidoptera
with special reference to North and South Dakota
Two synapomorphies
(shared derived characters) that unite the Pyraloidea are the possession of
tympanal organs at the base of the abdomen and scales on the proboscis
Family Crambidae
Crambidae,
praecinctorium present at base of abdomen, vein Rs4
of fw usually arising from discal cell and not stalked with Rs2+3 unless wing
pattern is longitudinal. World wide about 11,600 species, more than 850
in North America.
Family Pyralidae
Pyralidae, abdomen with praecinctorium absent,
vein Rs4 of fw stalked
with Rs 2+3,
forewing pattern usually transverse. World wide about 6,100
species, at least 565 in
North America.
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