Fig. 10

Micrographs of some Oligocene–early Miocene sporomorph species. 1 – Retitricolporites irregulalis Van der Hammen et Wymstra 1964 (65 μm); 2 – Magnastriatites howardii Germeraad, Hopping and Muller 1968 (65–70 μm); 3 – Cyathidites australis Couper 1953 (48–50 μm); 4 – Polypodiaceoisporites retirugatus Muller 1968 (45 μm); 5 – Leiotriletes adriennis Potonié et Gelletich, 1933 (62 μm); 6 – Psilastephanocolporites laevigatus Salard-Chelboldaeff 1978 (33 × 30 μm); 7 – Chenopodipollis dispersus Takahashi and Jux 1989 (45 μm); 8 – Retibrevitricolporites obodoensis Legoux 1978 (35 μm); 9 – Racemonocolpites hians Legoux 1978 (36 × 27 μm); 10 – Retibrevitricolporites protrudens Legoux 1978 (41 × 30 μm); 11 – Zonocostites ramonae Germeraad, Hopping and Muller 1968 (21–24 μm); 12 – Verrucatosporites usmensis (van der Hammen) Germeraad, Hopping and Muller 1968 (40–32 μm); 13 – Laevigatosporites ovatus Wilson and Webster 1946 (40 × 28 μm). Bar scale = 20 μm