Abstract
The Lower Permian succession of the Huqf area (Sultanate of Oman) represents the uppermost part of a mega-sequence which includes the Late Carboniferous to? Sakmarian tillites of the Al Khlata Fm. and the overlying transgressive marine Saiwan Fm. of Early Permian age. The Saiwan yields a rich brachiopod fauna associated with bivalves, gastropods, crinoids, conularids, cephalopods and bryozoans. The brachiopod fauna of the Saiwan includes Derbyia haroubi nov. sp., Arctitreta cf. bioni ( Reed), Reedoconcha permixta ( Reed), Neospirifer aff. hardmani ( Foord), Neospirifer sp., Trigonotreta sp., ? Cyrtella aff. nagmargensis ( Bion), Subansiria sp., Punctocyrtella spinosa Plodowski, Punctospirifer sp., Callispirina sp., Fletcherithyris sp., ? Gilledia sp. This brachiopod assemblage indicates a Late Sakmarian age. Application of the Unitary Association method (Guex 1991) to the brachiopod data of the Saiwan leads to establish a local biochronological sequence of three faunal associations.
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