ABSTRACT: Anew pfenderinid taxon is described as Pachycolumella nov. gen. with the two species P. elongata n. sp. (type-species), and P. acuta n. sp. The type material comes from the upperMaastrichtian Tarbur Formation of the Zagros Zone, SWIran. Areconstruction of Pachycolumella nov. gen is presented including allmorpho-structural elements such as a conspicuous central columella. The wall of the elongate and triserially coiled test is microgranular-agglutinated displaying a pseudokeriothecal texture. Pachycolumella species are also reported from the Paleocene (Danianâ€“early Thanetian) of Turkey,Oman, Iran (this paper), India, and Pakistan, thus representing aKâ€“Pg survivor taxon. In Iran Pachycolumella is reported from various localities belonging to both the former northern and the southern Neo-Tethyan margin. In the western Neo-Tethyan realm (e.g., Adriatic Carbonate Platform), Pachycolumella seems to be absent.
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