Late Ordovician to early Silurian acritarchs from the Qusaiba-1 shallow core hole, central Saudi Arabia

Two new acritarch genera, five new species and one new combination are proposed: Dorsennidium polorum (Miller and Eames, 1982) comb. nov., Falavia magniretifera gen. et sp. nov., Inflatarium trilobatum gen. et sp. nov., Nexosarium mansouri sp. nov., Orthosphaeridium orthogonium sp. nov. and Tunisphaeridium bicaudatum sp. nov. Samples from the same set were used for chitinozoan, scolecodont and miospore studies (this volume). Eurypterid and graptolite remains are also present.