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 Nodosisporites makotoi Legrand, Pons, Nishida & Yamada n. sp. ( Fig. 10 A-F) Nodosisporites sp., Legrand, Palynologie des dépôts Jurassique supérieur et Crétacé inférieur du Japon , et provinces paléofloristiques du sud-est asiatique : 166, 167, pl. XIII, figs 1, 2, 4, 7; pl. XIV, fig. 7 (2009). TYPE MATERIAL . — Site II , horizon 2, slides a, b; holotype ( II2 a-L58/2; Fig. 10A, D ) ; paratypes ( II2 b-E56/3, II2b-U33; Fig. 10B, C, E, F ). Collection de Paléobotanique-UPMC, Paris, France . ETYMOLOGY. — The species is named in honour of Prof. Makoto Nishida, who first studied fossil plants from the Choshi Group. OCCURRENCE. — Ashikajima and Kimigahama formations. TYPE LOCALITY . — Hatoyama, SE Choshi Peninsula, Chiba Prefecture , Japan. STRATIGRAPHIC HORIZON. — Ashikajima Formation (Barremian). DIAGNOSIS Tetrahedral trilete microspore. Amb rounded triangular. Proximal face slightly flattened, with a psilate contact area followed by 1 or 2 muri parallel to the equator. The laesurae are relatively narrow, raised (about 3 µm ), undulating, and extend to the 3/4 of the spore radius or to the equator; they are smooth or ornamented by small spines ( 0.5-1 µm high and 1-3 µm in basal diameter). Near the apices, 5-6 big spines ( 3-5 µm high) are present. A translucent equatorial zona with a dentate margin can be seen. The exine is cicatricose. The distal face shows 3 sets of 3-4 muri sinuous but parallel to the equator. One of these sets goes on to form a triangle (sometimes, more or less a network) centered on the distal pole ( Fig. 11 ). The ornamentation of this form corresponds to the type I-A defined by Krutzsch (1963) . Equatorial diameter = 40-45 µm . REMARKS Appendicisporites dentimarginatus Brenner, 1963 shows similarities with Nodosisporites makotoi , but lacks spines on the apices. BOTANICAL AFFINITIES Schizaeales , Anemiaceae ( Dettmann & Clifford 1992 ) . The ornamentation shows similarities with that of Anemia phyllitidis (Linnaeus) Swartz from Brazil , figured by Tryon & Lugardon (1991) .