The lynceid clam shrimps (Branchiopoda: Laevicaudata) of Thailand, with keys to the Eurasian species

Abstract

Laevicaudatan clam shrimps have been previously reported from Thailand, but were only tentatively identified. We report on two new species of laevicaudatan clam shrimps from Thailand collected after conducting widespread, intensive surveys across the central region of the country. We present diagnoses for each, with remarks on the Asian taxa. Lynceus spinimanus n. sp. is separated from all congeners by the form of the male claspers, the female rostral morphology, and the unique chitinized and projecting epipod and exopod on the female thoracopod XI. Lynceus planifascius n. sp. is separated from all congeners by the form of the rostrum in both sexes and the form of the male clasper. An identification key to the currently accepted Eurasian Lynceus species is provided.