The genus Thalleulia Razowski, 2004 was previously represented by three species known only from Ecuador, each described from a single male. A new species, Thalleulia bisexta, n. sp., is described and illustrated from Costa Rica, based on both sexes. Female genitalia indicate a close relationship between Thalleulia and Inape Razowski, 1988.
Brown, J.W. & Powell, J.A. (1991) Systematics of the Chrysoxena group of genera (Lepidoptera: Tortricidae: Euliini). University of California Publications in Entomology, 111, 1–87, figs.
Brown, J.W. & Razowski, J. (2003) Review of Inape Razowski (Lepidoptera: Tortricidae: Euliini), with descriptions of five new species. Acta Zoologia Cracoviensia, 46, 197–208.
Razowski, J. (2004) Tortricinae and Chlidanotinae (Lepidoptera: Tortricidae) collected by B. Landry in Ecuador. Acta Zoologica Cracoviensia, 47 (3–4), 249–261. https://doi.org/10.3409/173491504783995816
Razowski, J. & Pelz, V. (2006) Remarks on Inape Razowski, 1988 from Ecuador with description of 21 new species (Lepidoptera: Tortricidae: Euliini). Nachrichten des Entomologischen Vereins Apollo, Neue Folge, 27, 115–130.
Razowski, J. & Wojtusiak, J. (2008) Tortricidae (Lepidoptera) from the mountains of Ecuador. Part 1. Southern Highlands. Acta Zoologica Cracoviensia, 51B, 7–41. https://doi.org/10.3409/azc.51b_1-2.7-41
Razowski, J. & Wojtusiak, J. (2009) Tortricidae (Lepidoptera) from the Mountains of Ecuador and remarks on their geographical distribution. Part IV: Eastern Cordillera. Acta Zoologica Cracoviensia, Series B: Invertebrata, 52 (1–2), 119–187. https://doi.org/10.3409/azc.52b_1-2.119-187