Matonisporites sp. 1

Legrand, Julien, Pons, Denise, Nishida, Harufumi & Yamada, Toshihiro, 2011, Barremian palynofloras from the Ashikajima and Kimigahama formations (Choshi Group, Outer Zone of south-west Japan), Geodiversitas 33 (1), pp. 87-135 : 105

Matonisporites sp. 1

Matonisporites sp. A, Legrand, Palynologie des dépôts Jurassique supérieur et Crétacé inférieur du Japon, et provinces paléofloristiques du sud-est asiatique: 164, pl. XI, fig. 6 (2009).

OCCURRENCE. — Kimigahama Fm.

DESCRIPTION

Psilate trilete microspore. Amb rounded triangular with slightly convex sides. The laesurae are straight and extend to the 3/4 of the spore radius.The exine is about 4 µm thick. Equatorial diameter = 90 µm.

BOTANICAL AFFINITIES

Couper (1958) discovered Matonisporites spores in situ in Phlebopteris Brongniart , Selenocarpus Schenk and Matonidium Schenk ( Gleicheniales , Matoniaceae ). Ash et al. (1982) and Sukh-Dev (1980) also discovered in situ Matonisporites spores in Phlebopteris sporangia, associated with Dictyophyllidites Couper, 1958 emend. Dettmann, 1963 spores.