Northern Prairie Wildlife Research Center
Caterpillars of Eastern Forests
Thyatirid Moths (Family Thyatiridae)
Although the caterpillars of thyatirids superficially resemble those of owlet
moths, they are in fact quite closely related to the hooktips. This small family
includes but 3 common eastern species. The midabdominal segments bear 12 setae
above the proleg, whereas those of many similar-appearing caterpillars have
11 or fewer setae. The head is wider than high and the labrum deeply cleft.
Anal prolegs tend to be smaller then those of the mid-abdomen. Crochets of 2
lengths are set in an arching series; a smaller inner series is often present.
Caterpillars often shelter within a loosely folded leaf.
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