Polyadopollenites sp. 2

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

Polyadopollenites sp. 2

Figure 5.1

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

Description. Polyad with 16 pollen grains: eight central grains and eight peripheral. Syncolpate. Exine tectate columellate, 0.8–1.6 µm thick, foveolate.

Dimensions. Polyad 36.8 µm, one specimen measured.

Comparisons. Polyadopollenites sp. 2 has distinctively syncolpate, tectate and foveolate monads; in contrast, Acaciapollenites has inaperturate, tectate and psilate monads ( Pocknall and Mildenhall, 1984). This taxon does not have a superficial reticulum as Polyadopollenites cooksonii ( Cavagnetto and Guinet, 1994) ; furthermore, Polyadopollenites sp. 2 has syncolpate apertures instead of subsidiary apertures.

Other occurrences. Polyadopollenites sp. 2 shows the same geographic pattern as Polyadopollenites sp. 1 .

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.