Udea pantheropa is a moth in the Crambidae family. It was described by Meyrick in 1884. It is found in New Zealand, where it has been recorded from the Chatham Islands. The wingspan is 25-26 mm. The forewings are orange, variably mixed with reddish-fuscous or dark fuscous, especially on the veins and some specimens are wholly suffused with fuscous. The extreme costal edge is sometimes whitish in the middle. The markings are reddish-brown, mixed or suffused with dark grey and there is a suffusion along the basal part of the costa, sometimes extending basally to the dorsum. The first line is irregularly curved and the second denticulate, forming a strong subquadrate loop inwards below the middle, the space between them wholly suffused with dark except along the costa and on a band preceding