Malvacipollis spinulosa Frederiksen, 1983

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 : 11

Malvacipollis spinulosa Frederiksen, 1983

Figure 5.12

Material. Sample Pb-9334(4), Palynology Laboratory, IGLUNAM.

Description. Monad, isopolar, radiosymmetric, amb circular, spheroidal. Stephanoporate, pores annulate. Exine tectate, supraechinate, echinae solid, 1 – 1.2 µm in height, distributed homogeneously over the surface of pollen grain.

Dimensions. Equatorial diameter 23 (25) 27 µm based on three measured specimens.

Other occurrences. Mexico – late Eocene to early Oligocene Pie de Vaca Formation ( Martínez-Hernández and Ramírez-Arriaga, 1999). U.S.A. – late Paleocene Silverado Formation, California ( Gaponoff, 1984); Paleocene – Oligocene, South Carolina ( Frederiksen, 1980b); late Eocene – early Oligocene of the Elko Formation, Nevada ( Wingate, 1983); it was cited as Echiperiporites from the Eocene of Mississippi embayment ( Tschudy, 1973); middle Eocene, San Diego, California ( Frederiksen et al., 1983). Argentina –middle Miocene, Argentina ( Barreda et al., 1998).

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.