Parathalassiinae

Microphorella is a genus of flies in the family Dolichopodidae. It is currently considered both paraphyletic and polyphyletic, and several species groups may need to be recognised as subgenera or genera.

Parathalassius is a genus of flies in the family Dolichopodidae. It is found along sandy sea coasts in both the Palaearctic and Nearctic realms. The name "Parathalassius" is of Greek origin, and can be translated as "near the sea".

Plesiothalassius is a genus of flies in the family Dolichopodidae. It is found along sandy sea coasts in South Africa. It contains three described species. It is closely related to Amphithalassius.

Eothalassius is a genus of flies in the family Dolichopodidae. It contains four described species, from Southeast Asia, Papua New Guinea, Costa Rica and the Mediterranean. It also contains three undescribed species, one from New Caledonia and two from Japan.

Amphithalassius is a genus of flies in the family Dolichopodidae. It is found along sandy sea coasts in South Africa. It contains two described species, and three undescribed species known only from females. It is closely related to Plesiothalassius.