Margocolporites aff. vanwijhei Germeraad et al., 1968

Ramírez-Arriaga, Elia, Prámparo, Mercedes B. & Martínez-Hernández, Enrique, 2014, Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico, Palaeontologia Electronica 102 (8), pp. 1-38 : 16

Margocolporites aff. vanwijhei Germeraad et al., 1968

Figure 4.6

Material. Samples Pb-9334(1) and Pb-9334(4), Palynology Laboratory, IGLUNAM.

Description. Monad, isopolar, radiosymmetric, amb circular. Tricolporate, exoapertures present colpal membrane with fine baculae and margo 1 µm thick, endoaperture lolongate 2.4 µm X 5.6 µm. Exine subtectate, collumelate, 1.2 µm thick, reticulate, heterobrochate, lumina 0.8- 1.5 µm, simplicolumelate muri.

Dimensions. Equatorial diameter 34.3 (38) 44 µm, polar diameter 34 µm, four specimens measured.

Other occurrences. Mexico – Oligocene San Gregorio Formation, Baja California Sur (Martínez-Hernández and Ramírez-Arriaga, 2006). Originally described from the Paleogene of the Caribbean region and Nigeria ( Germeraad et al., 1968). South America – late Oligocene to Miocene Chenque Formation ( Barreda, 1997c); early Miocene Chinches Formation ( Ottone et al., 1998); and middle Miocene “Serie el Yeso,” Argentina ( Barreda et al., 1998).

Figures

FIGURE 4. Angiosperm pollen grains from the Cuayuca Formation. 1, Corsinipollenites sp. 1, Pb–9334(1): EF G33/ 3; 2, Corsinipollenites sp. 3, Pb–9334(4): EF R36/1; 3, Corsinipollenites sp. 2, Pb–9334(4): EF T35/3; 4-5, Margocolporites sp., Pb–9340(1): EF N35/3; 6, Margocolporites aff. vanwijhei, Pb-9334(1'): EF T39/2; 7, Monocolpopollenites aff. texensis Nichols, Ames and Traverse 1973 Pb–8872(1A): EF W29/1; 8-9 Rhoipites sp., Pb–8890(1):101.9/17.2; 10, Lymingtonia sp., Pb–9334(4): EF S32/4; 11, Momipites tenuipolus Pb-9334(4): 101.6/12.5; 12, Momipites coryloides, Pb-9138’(1): 92.2/2.8; 13, Fabaceae pollen type 3, Pb–9334(4): EF M34/4; 14, Clavainaperturites sp., Pb– 9147(2): EF R34/2; 15, Linum pollen type, Pb–9334 (1’): EF S33/2; 16, Magnaperiporites sp., Pb–9334(4): EF R39/2; 9. Scale bar represnts 10 µm.