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Circanota, new genus, and its two new species, C. undulata sp. n. (type species), from Costa Rica and Panama, and C. simplex sp. n., from Panama and Ecuador, are described and illustrated. Although superficially similar to some species of Platynota Clemens, 1860, Circanota appears to be more closely related to members of a putative clade within Sparganothini defined by a slender crescent-shaped signum in the corpus bursae of the female genitalia. The most conspicuous autapomorphy for Circanota is the strongly undulate costa of the male and female forewing. Barcode sequence data (i.e., cytochrome oxidase I) from Circanota undulata (n = 12) form a tight cluster with exceedingly limited genetic divergence (less than 0.1%); specimens of C. simplex have not been sequenced. In neighbor-joining trees based on COI, Circanota is portrayed nearest Sparganothoides, which is consistent with morphological evidence.