Polygalacidites 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 : 17

Polygalacidites sp.

Figure 5.16

Material. Sample Pb-9340, Palynology Laboratory, IGLUNAM.

Description. Monad pollen, isopolar, radiosymmetric, subprolate. Stephanocolporate, endoaperture lalongate with costae. Exine atectate, 1.2 µm thick, psilate.

Dimensions. Equatorial diameter 11 µm, polar diameter 20 µm, one specimen measured.

Comparisons. This taxon differs from the Polygalacidites sp. from the Neogene of southeastern Sudan ( Eisawi and Schrank, 2008) as the latter has more numerous and larger ectoapertures than the Polygalacidites sp. from the Cuayuca Formation. Nevertheless, both taxa have almost the same polar diameter.

Other occurrences. Mexico – late Eocene – early Oligocene ( Martínez-Hernández, 1999), Oligocene San Gregorio Formation (Martínez-Hernández and Ramírez-Arriaga, 2006). Originally described from Paleogene in Assam, India ( Sah and Dutta, 1966).

Figures

FIGURE 5. Angiosperm pollen grains from the Cuayuca Formation. 1, Polyadopollenites sp. 2, Pb–9334(4): EF R37/ 4; 2-3, Polyadopollenites sp. 1, Pb–9340(1): 101.4/12.6; 4, Landolphia pollen type, Pb–9334(1): EF T41/1; 5, Perisyncolporites sp., Pb–9334(4): EF E44/1; 6, 10, Malpighiaceoidites sp., Pb–9334(4): EF H42/2; 7, 11, Mutisiapollis sp., Pb–8872(3): EF P33/4; 8-9, Striatricolporites sp., Pb–9336(1): EF G32/1; 12, Malvacipollis spinulosa, Pb- 9334(4): 94/7; 13, Ranunculacidites cf. communis, Pb–9334(4): EF D34/1/4; 14-15, Brosipollis sp., Pb–9334(4): EF U41/3; 16, Polyadopollenites sp. 1 Pb–9334(4): EF S39/4; 17, Tubulifloridites sp., Pb–9136(1): EF F39/4; 18, Ulmipollenites sp., Pb–9334(4): EF N40/1; 19, Thomsonipollis sabinetownensis, Pb-9334(4): 94.2/7.4; 20, Sabicea pollen type, Pb–9334(4): EF E42/1; 21, Ranunculacidites operculatus, Pb-9334(4): 101.8/7.2; 22 Rhamnaceaepollenites sp., Pb–9334(4): EF T32/2. Scale bar represents 10 µm.