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 7707 10.5252/g2011n1a6 31ed99a5-9135-40a2-92a4-64217d9de577 1638-9395 4597011 Botryococcus sp. cf. B. braunii Kützing, 1849 OCCURRENCE. — Ashikajima Fm (rare). DISTRIBUTION. — This genus is known from the Precambrian. DESCRIPTION Algae grouped in small bulb-like colonies, very altered. Colony diameter = 20-25 µm . BOTANICAL AFFINITIES Chlorococcales, Botryococcaceae . Freshwater green algae.