Title: Hanadirella, a new problematic arthropod(?) from the Lower Ordovician (Llanvirn) Tabuk Formation, central Saudi Arabia ; Some Silurian (Llandovery) monograptids from Saudi Arabia
Subjects: Graptolites, Hanadirella, Paleontology
Places: Quṣaybah Region, Saudi Arabia, Ḥanādir Mountain Region
Time periods: Ordovician, Silurian