Abstract The crinoid fauna of the Late Ordovician (Sandbian and Katian) of Morocco is sparse, but diverse. The one previously described species, Rosfacrinus robustus Le Menn & Spjeldnaes, 1996 , is now known to be part of an assemblage of at least 10 species, including the new taxa Iocrinus ouzammoui sp. nov. (Disparida), Superlininicrinus advorsa gen. et sp. nov., Isthloucrinus praecursor gen. et a sp. nov. (Cladida) and Euptychocrinus ? atelis sp. nov. (Camerata). The fauna also includes an additional species of Iocrinus , and several camerates including Trichinocrinus sp. and a monobathrid with probable affinities to the Tanaocrinidae. Undeterminable specimens of demonstrably different taxa are described as far as possible. The fauna includes genera previously known from Laurentia and Avalonia, implying unexpected latitudinal dispersal, together with evidence for substantial endemic diversification among cladids and camerates. Several of the taxa have unusual plate arrangements, including a mosaic of primitive and derived characters; this implies that early crinoid diversification was not limited to tropical carbonate facies. The fauna remains poorly known, with low numbers of specimens, and future collecting is likely to increase the diversity significantly.