Taxonomic review of the Oriental genus Lestage, 1921 (Ephemeroptera, Euthyplociidae), with two new records for Thailand.

Previously, the euthyplociid mayfly from Thailand was reported as spp. without designation to any nominal species. In this study, the genus Lestage, 1921 in Thailand was reviewed.

Behningiidae and Potamanthidae (Insecta, Ephemeroptera) in Thailand.

The aim of this study is to review the family Behningiidae and Potamanthidae in Thailand. Two genera and three species of Behningiidae are recognised: Peters & Gillies, 1991, McCafferty & Jacobus, 2006, and Zhou & Bisset, 2019, which is newly reported from Thailand. The egg structure of is described for the first time using scanning electron microscopy.