Resapamea mammuthus is a moth in the family Noctuidae. It only known only from the type locality at Old Crow, Yukon Territory.[1]
The length of the forewings is 21.5 mm for males. The forewings are a mixture of tan, orange-tan, gray-tan, light-gray, brown-gray, and gray scales, appearing medium-dark orange tan, grayer near anterior and posterior margins and darker gray-brown in the terminal area. The hindwings are light gray tan with gray suffusion, very faint postmedial line, marginal band, terminal line, veins, andchevron-shaped discal spot.
The name is derived from the genus of the woolly mammoth, Mammuthus, because its Beringian distribution and relatively large size for the genus.