Georeferenced records of Zizula hylax hylax (Fabricius, 1775) (Lepidoptera, Lycaenidae) in Thailand, with observations on developmental stages and molecular confirmation

Zizula hylax hylax (Fabricius, 1775), commonly known as the Tiny Grass Blue, is widely distributed across several countries, including Thailand. We report georeferenced records of Z. h. hylax associated with the host plant Ruellia tuberosa L. (Acanthaceae) from Nakhon Pathom, Phetchaburi, and Bangkok, Thailand. In Nakhon Pathom Province, we documented all four developmental stages: egg, larva, pupa, and adult. DNA barcoding of specimens from all three provinces corroborates the morphological identification and provides the first molecular confirmation of this species in Thailand. Photographs of the four developmental stages are provided.