Coral fauna across the Cretaceous- Paleogene boundary at Zagros and Sistan Suture zones and Yazd Block of Iran Author Baron-Szabo, Rosemarie C. Department of Invertebrate Zoology, Smithsonian Institution, MRC- 163, W- 329, Washington, DC 20013, USA & Research Institute Senckenberg, Senckenberganlage 25, Author Schlagintweit, Felix Lerchenauerstr. 167, 80935 MÜnchen, Germany Author Rashidi, Koorosh Department of Geology, Yazd University, Yazd 89195 - 741, Iran text Swiss Journal of Palaeontology 2023 7 2023-05-09 142 1 1 49 https://doi.org/10.1186/s13358-023-00264-8 journal article 10.1186/s13358-023-00264-8 1664-2384 14663612 Heliopora incrustans Nielsen, 1917 Fig. 13B *1917 Heliopora incrustans n. sp. : Nielsen, p. 12 ‒ 13, Figs. 16 ‒ 17. 1990 Heliopora incrustans Nielsen, 1917 : Bernecker & Weidlich, p. 115, Pl. 31, Fig. 5 , Pl 32, Fig. 4 . 2014 Heliopora incrustans ( Nielsen, 1917 ) : Lauridsen & Bjerager, p. 5ff., Fig. 4A . Dimensions . d (small): 0.5 ‒ 1.1 mm; d (great): up to around 1.8 mm; pseudosepta: ranging between 20 and 30; tubes/0.5mm 2 : generally 10 ‒ 15. Description . Small (around 10 mm in diameter), massive colony; corallite tubes are subcircular in outline; pseudosepta developed extremely irregularly in size and thickness, some are around 20% the corallite diameter in length, other are spine ‒ like and less than 50 µm in length. Type locality of species . Middle Danian of Denmark (Faxe limestone). Distribution . Middle Danian of Denmark (Fakse limestone), Selandian or Tanetian of Iran (Zagros Zone, southwestern Iran ; this paper). New material. Qs86 (1 ‒ 4) (Zagros Zone, southwestern Iran ). Remarks. Species Heliopora incrustans well documented in Lauridsen & Bjerager, (2014, Fig. 4A ).