“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.