Leonardosia langei Sommer (Charophyta, Porocharaceae) from Corumbataí Formation (Guadalupian), Piracicaba, SP, Brazil: First record of an antheridium and of corticated thalli. (2009). Ameghiniana, 46(1), 49-58. https://ameghiniana.org.ar/index.php/ameghiniana/article/view/176