The Odonata of the Tassili-n-Ajjer, Algeria Henri J Dumont
[email protected] Inleiding The study area: Tassili-n-Ajjer It has been pointed out to me that, in the The Tassili-n-Ajjer (‘plateau of the rivers’) is a framework of my Sahara work, I have dealt with 75,000 km2 sandstone plateau in the centre the Odonata of the Air (Dumont 1978a), the of the Sahara desert, mainly on east Algerian Hoggar mountains (Dumont 1978b), and later territory, but extending in the south-east as the with the Mouydir plateau (Dumont 2007) and Tadrart Acacus into western Libya. The area has the Tibesti and Ounianga (Dumont 2014), but I become world famous as an archaeological site, have never published on the Central Saharan where thousands of rock paintings of Neolithic plateau of Tassili-n-Ajjer. Yet, I visited this area age were found (Lhote 1958). It is well isolated of deeply dissected sandstone on six occasions from the Hoggar that extends to the south-west, between 1978 and 1991, and made observations and more or less contiguous with the Mouydir on the local dragonfly fauna. Here, I present the and Tefedest plateaus in the west. The plateau delayed results of this work. Voucher specimens is deeply dissected by the canyons of a number were collected, in addition to field notes on of oueds (or wadis). Most of these run north, observations made in situ, when no specimens although some shorter ones drain towards the were extirpated from nature. Some locations south. Many of these canyons are so deep that were only visited once, others four or five times permanent water can locally be found on their (see below).