A new orthoceratoid cephalopod from the Ordovician (Caradoc) of east-central Iran

Orthoconic cephalopods from the Ordovician Katkoyeh Formation at Banestan, Kerman Province, Iran, comprise a single species named as Sactorthoceras banestanensis Evans nov. sp. Associated faunas suggest close palaeobiogeographical linkage with other regions of north peri-Gondwana, notably Morocco and Bohemia (Perunica), while Sactorthoceras itself is also indicative of relationships with Baltica and the Sino-Korean Plate.     

Some Late Triassic gastropods from the Nayband formation in Central Iran

Summary Six gastropod species from the Late Triassic Nayband Formation are reported. The following taxa are introduced as new:Trochonodus iranicus n. gen., n. sp. andCryptaulax convexa n. sp. The following species are transferred toTrochonodus n. gen.:Riselloidea aliabadensis Nützel and Senowbari-Daryan 1999 (type species ofTrochonodus),Riselloidea biarmata (Münster),Riselloidea bitorquata (Hébert and Eudes-Deslongchamps),Scalaria limatula Ammon, andAmberleya trimonilis (Orbigny). The holotype ofChulitnacula jenningsi (Douglas) is newly illustrated and described. According to the current state of knowledge, the gastropod faunas of the Nayband Formation near Esfahan and near Tabas differ considerably from each other. They share onlyAnulifera binodosa. TheAnulifera species-cluster has representatives in the Norian/Rhaetian from the North Alps, Iran, Burma, and South China. Contribution to the Triassic Paleontology of Iran No. 10. For No. 9 see previous text in this volume.