Two successions of Carboniferous sedimentary rocks in Central Iran yielded ammonoid assemblages from
one horizon each.  In the Ramsheh section, a siltstone with Neoglyphioceras yazdii n. sp. and Dombarites can
be assigned to the latest Viséan.  The assemblage from the Shesh Angosht Mountain is more diverse with
species of the genera Proshumardites, Eumorphoceras, Homoceras, Glaphyrites, Syngastrioceras, and
Dombarocanites.  This is the first time that the co-occurrence of the genera Eumorphoceras and Homoceras
has been recorded.  This fauna contains elements of the South Urals and Central Asian occurrences of
Bashkirian ammonoids and suggests close palaeobiogeographic relationships.