The Double-toothed Prominent does not have literal teeth, but the adult and larva both have their own kind of fang-like projections.
The Double-toothed Prominent is a two-toned moth: part dark brown, and part tan or light brown. The colors run vertically with dark brown on the outer wings and the lighter color in the middle. In two places where the colors meet on each wing, the dark brown pushes into the middle in a pointed shape that resembles fangs. A dark, hairy round patch sits on the thorax.
The caterpillar is peculiar. It is green and slender, but along the dorsal (back) side sit pairs of nubs on many segments. They are almost fang-like as well. Some are longer than others, giving rise to calling this caterpillar a stegosaurus, after the dinosaur with pointed plates along its spine. This strange shape helps the larva conceal itself along the edge of elm leaves. When curled on the edge of the leaf, the caterpillar's ridge of bumps blend in very well with the leaf's tiny serrations. Since elm leaves are a host plant, this camouflage is certainly helpful to the larva while it feeds. Two broods can be produced each year.
Scientific Name: Nerice bidentata
Butterfly or Moth
Size (Adult; Length): 20mm to 21mm (0.78in to 0.82in)
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Butterfly and Moth Anatomy
Antennae: Butterflies and Moths have a pair of antennae on the head used as sensors.
Head: The head is home to the insect's eyes, antennae, and proboscis.
Thorax: Home to the three pairs of legs as well as vital internal organs.
Abdomen: Contains vital internal organs such as the heart(s) and reproduction facilities.
Forewing: The upper, forward wing pair used for flying.
Hindwing: The lower, rearward wing pair used for flying.
NOTE: Butterflies and Moths are part of the Lepidopteran order as they share many similarities.