Vinn, Olev, Magdy El Hedeny, Abdullah Alkahtane, and Saleh Al Farraj. “The First Record of Endobiotic Cornulitids in a Heliolitid Coral from the Hirnantian (Late Ordovician) of Estonia”. Revista Brasileira de Paleontologia 28, no. 4 (February 18, 2026): e20250548. Accessed May 2, 2026. https://sbpbrasil.org/publications/index.php/rbp/article/view/548.