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Fig. 8 | Journal of Palaeogeography

Fig. 8

From: Palynomorph assemblage biozonation of Paleogene strata in Bende–Umuahia Area, Niger Delta Basin, southeastern Nigeria

Fig. 8

Micrographs of some spores and pollen grains from the Imo Formation. 1Proxapertites operculatus Germeraad, Hopping and Muller 1968 (70–80 μm); 2Bombacidites annae (Van der Hammen 1954) Leidelmeyer 1966 (37–40 μm); 3Mauritidiites crassiexinus Jan du Chêne, Onyike, and Sowunmi 1978 (45–50 μm); 4Spinizonocolpites baculatus Muller 1968 (60 × 55 μm); 5Proxapertites cursus Van Hoeken-Klinkenberg 1966 (75–85 μm); 6Mauritidiites crassibaculatus Van Hoeken-Klinkenberg 1964 (60 × 31 μm); 7Echitriporites trianguliformis Van Hoeken-Klinkenberg 1964 (26 μm); 8Foveotricolporites crassiexinus Van Hoeken-Klinkenberg 1966 (25 × 23 μm); 9Retistephanocolpites williamsi Germeraad, Hopping and Muller 1968 (36 μm); 10Grimsdalea polygonalis Jan du Chêne, Onyike, and Sowunmi 1978 (47–62 μm). Bar scale = 20 μm

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