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The Middle Devonian of the Djebel Aberraz (Reggane basin, Algerian Sahara) shows clays/limestone alternances subdivided in two lithological formations: ‘Adrar Morrat Clays’ and the ‘Azzel Matti Limestones’. The alternances yielded a benthic fauna composed of brachiopods associated to bryozoans, trilobites, crinoids and rare nectonic cephalopods. The taxonomic ranges of the brachiopods shows 14 species grouped into 13 genera, briefly described with their stratigraphic ranges. Most of the species are well known in the palaeobiogeographical Gondwana’s realm. The sedimentary environment showed small variations between the offshore and offshore-transition during the Eifelian, marked by the presence of the  Glyptogypa multiplicata  ecozone associated to  Leptaena  sp. cf.  dicax, Schizophoria  ( Schizophoria ) cf.  schnuri bicissa, Aulacella prisca, Atrypa  ( Planatrypa )  squamifera, Productella  sp. cf  navicella, Kransia  ( Fatimaerhynchia )  goldfussii, Kransia  ( Fatimaerhynchia )  signata, Athyris curvata  and  Cyrtina intermedia . The Givetian strata evolved in an offshore environment with the  Lebanzuelle ?  issoumourensis issoumourensis  ecozone associated with  Pseudocamarophoria undulataeformis, Cyrtina intermedia, Beckmannia beckmanni  and  Dicamara prunulum . The transgressive Middle Devonian strata of Djebel Aberraz constitute deepening-up sequence where the brachiopod stocks followed the bathymetric stress by less diversity and moderate richness.

Middle Devonian brachiopods of the Reggane area (Algerian Sahara): palaeontology, stratigraphy and environments