• Main Authors: Michael D. Nowaka, Richard Lupiab
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Filicopsida; megaspores; new taxa; Cretaceous; Minnesota; Greenland
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.519.7971; http://biology.duke.edu/yoderlab/reprints/Nowak%26Lupia2005RevPP.pdf

ria floats, a microspore exine without a porous layer, a two-layered structure of microspore perine, and the differentiation of perine on proximal and distal poles of the microspores. Overall, A. varius displays a combination of traits consistent with previous The morphogenus Ariadnaesporites was erected by Potonie ́ (1956) to accommodate a megaspore the east coast of Disko Island, Greenland. Miner originally placed these megaspores in the mega-fossil genus Selaginellites. The reassignment by Review of Palaeobotany and PalynoloT Corresponding author. Fax: [phone].inferences about its status as a transitional form in the lineage leading to Salviniaceae and to Azolla in particular. In recognition of the unique combination of characters that A. varius possesses, the species is transferred to the new morphogenus