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| Souza Faria, Rafael and Ricardi-Branco, Fresia Leonardosia langei Sommer (Charophyta, Porocharaceae) from Corumbataí Formation (Guadalupian), Piracicaba, SP, Brazil: First record of an antheridium and of corticated thalli. Ameghiniana, Mar 2009, vol.46, no.1, p.49-57. ISSN 0002-7014
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