Magnaperiporites sp.

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 : 14-15

Magnaperiporites sp.

Figure 4.16

Material. Sample Pb-9334, Palynology Laboratory, IGLUNAM.

Description. Monad pollen, apolar, radiosymmetric, spheroidal, periporate. Pores circular or subcircular, 3 µm in width, distance between pores from 8 to 10 µm, pattern areolate. Exine tectate collumelate, 4 µm thick without echinae, perforate supraechinate, echinae 1 µm high.

Dimensions. Diameter 65 µm, one specimen measured.

Comparisons. Magnaperiporites sp. has smaller dimensions than M. spinosus illustrated by González-Guzmán (1967) and Salard-Cheboldaeff (1979). González-Guzmán (1967) gave a diameter for M. spinosus of 90 to 105 µm, with an exine thickness of 13.5 µm. Salard-Cheboldaeff (1979) reported M. spinosus with a diameter of 92–93 µm and exine 13 µm thick.

Other occurrences. This is the first mention of the genus in Mexican fossil microfloras. Magnaperiporites spinosus has been recovered from the Oligocene of Cameroon, Africa ( Salard-Cheboldaeff, 1979) and from the early to middle Eocene of Colombia ( González-Guzmán, 1967).

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.