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Oxymacaria Warren

Type species: palliata Hampson, India.

Synonyms: Heterocallia Leech (type species truncaria Leech, China) syn. n.; Ligdiformia Wehrli (type species temeraria Swinhoe) syn. n.; Xenoneura Warren (praeocc; type species tephrinata Warren, Australia).

These genera are brought together for reasons given in the introduction to the tribe despite Oxymacaria having bipectinate male antennae and Heterocallia having ciliate ones. Both have the ventral portion of the valve of the male genitalia relatively small, simple, and the uncus lacks horns. The male eighth sternite lacks a pair of processes, thus distinguishing the genus from Semiothisa sensu stricto. The narrow and curved upper portion of the valve in O. palliata and in the two Bornean species is contiguous with the ventral part of the valve rather than almost separate and articulating with it as in typical Semiothisa. Australasian species in Oxymacaria and the type species of Heterocallia have this upper arm broader and straight as in the Bornean Godonela species discussed later. Both ciliate and bipectinate antennae occur in association with both types of upper valve arm structure within the genus. Hence the facies features mentioned in the introductory section to Macariini are also critical in defining the genus; a slightly bifalcate forewing shape and a row of small white marks over the anterior part of the submarginal. The hindwing usually has an acute tail at M3. The fovea well developed, though not as strongly as in Godonela.

There are two species in Borneo.

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