Taxonomic notes and key to the West Palearctic () Osten Sacken, 1860 (Diptera, Limoniidae) with description of a new species from Morocco.

Background: The Mediterranean Region of the West Palearctic is one of the most species-rich biomes in the world, hosting a high level of endemism and relict species with important conservation value. The North Africa Atlas Mountains (spanning Morocco, Algeria and Tunisia) belong to a poorly-investigated region of the Mediterranean area, with overlooked aquatic biodiversity; hence, a number of species still remain to be discovered.

New Information: The subgenus Antocha (Antocha) Osten Sacken, 1860 is recorded for the first time from Africa, with a description of A.