FABALES Bromhead, 1838

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 : 15-16

Order FABALES Bromhead, 1838 Family FABACEAE Lindley, 1836

Fabaceae pollen type 1

Figure 3.12-13

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

Description. Monad pollen, isopolar, radiosymmetric, subprolate. Tricolporoidate. Exine semitectate, columellate, 1.2 µm thick, microreticulate, lumina 0.5 µm, muri 0.5 µm.

Dimensions. Equatorial diameter 26 µm, polar diameter 32 µm, one specimen measured.

Comparisons. Fabaceae pollen type 1 differs from Fabaceae pollen type 2 and Fabaceae pollen type 3 (in this paper) because it is tricolporoidate and microreticulate whereas Fabaceae pollen type 2 and Fabaceae pollen type 3 are tricolporate and not reticulate.

Other occurrences. Leguminosae fossil pollen grains have been recovered from late Eocene to early Oligocene Pie de Vaca Formation , Puebla ( Martínez-Hernández and Ramírez-Arriaga, 1999) .

Fabaceae pollen type 2

Figure 3.18-20

Material. Sample Pb-8890, Palynology Laboratory, IGLUNAM.

Description. Monad pollen, isopolar, radiosymmetric, prolate. Tricolporate, ectoaperture reaching apocolpia, endoaperture lolongate 3 x 7 µm. Exine tectate, columellate, 1 µm thick, psilate.

Dimensions. Equatorial diameter 18µm, polar diameter 30 µm, one specimen measured.

Comparisons. The colporate and tectate – psilate condition makes this specimen different from Fabaceae pollen type 1, and Fabaceae pollen type 3 (of the same association, described in this paper).

Other occurrences. Fabaceae fossil pollen grains have been recovered from late Eocene to early Oligocene Pie de Vaca Formation , Puebla ( Martínez-Hernández and Ramírez-Arriaga, 1999) .

Fabaceae pollen type 3

Figure 4.13

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

Description. Monad pollen, isopolar, radiosymmetric, amb triangular. Tricolporate. Exine tectate, 1µm thick, foveolate.

Dimensions. Equatorial diameter 25 µm, one specimen measured.

Comparisons. Observations on morphology was only achievable in polar view, thus it was not possible to describe the endoaperture. Nevertheless, it differs from other Fabaceae described in this contribution, because it is tectate–foveolate.

Other occurrences. Fabaceae fossil pollen grains ( Caesalpinia , Acacia , and Mimosa ) have been recovered from late Eocene to early Oligocene Pie de Vaca Formation, Puebla ( Martínez-Hernández and Ramírez-Arriaga, 1999).

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.