Barremian palynofloras from the Ashikajima and Kimigahama formations (Choshi Group, Outer Zone of south-west Japan) Author Legrand, Julien Author Pons, Denise Author Nishida, Harufumi Author Yamada, Toshihiro text Geodiversitas 2011 2011-03-31 33 1 87 135 http://dx.doi.org/10.5252/g2011n1a6 journal article 10.5252/g2011n1a6 31ed99a5-9135-40a2-92a4-64217d9de577 1638-9395 4597011 Alisporites sp. ( Fig. 12Q ) Alisporites sp. A, Legrand, Palynologie des dépôts Jurassique supérieur et Crétacé inférieur du Japon , et provinces paléofloristiques du sud-est asiatique : 183, pl. XVIII, figs 4, 7, 8 (2009). OCCURRENCE. — Ashikajima Fm. DESCRIPTION Bisaccate pollen grain. Central body spherical. The sacci are semi-circular, about as high as the central body, and wrap the proximal face. The exine is about 1.5 µm thick. Total width = 43 µm . Central body diameter = 25 µm . Sacci (length × width) = 15 × 28 µm . BOTANICAL AFFINITIES Gymnosperms, Pteridospermales?