This paper presents the first actual documentation of the Wenlock age
of the Sharawra Member (Qalibah Formation) of north-western Saudi Arab
ia by a direct palynological evidence. The local chitinozoan biozones
and three new chitinozoan species, Pseudoclathrochitina sharawraensis
sp. nov., Ancyrochitina parafragilis sp. nov. et Anthochitina jawfensi
s sp. nov. are described herein. Eurypterid remains, and palynomorphs
recovered from the Sharawra Member indicate a shallow marine environme
nt, close to emerged land with primitive plants.