†Goniosphaeridium bipyramidalis Pothe de Baldis 1997
Pothe de Baldis 1997. [Acritarchs from the Lower-Middle Llandoverian of the Don Braulio Formation, eastern Precordillera, San Juan province, Argentina.] Revista Espanola de Micropaleontologia, 29(1), Enero-Abril 1997: 31-68