Ulmipollenites 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 : 22

Ulmipollenites sp.

Figure 5.18

Material. Samples Pb-9137, Pb-9343, Pb-8896, Pb-8872, Pb-9141, Pb-9138, Pb-8898, Pb-9339, Pb-9340, and Pb-9147, Palynology Laboratory, IGLUNAM.

Description. Monad pollen, isopolar, radiosymmetric, amb subcircular. Tetraporate or pentaporate. Exine tectate, 1 µm thick, suprarugulate.

Dimensions. Equatorial diameter 17–33 µm, five specimens measured.

Comparisons. Considering dimensions and number of pores, Ulmipollenites sp. is similar to U. krempii from the Eocene of California, U.S.A. ( Frederiksen et al., 1983) and U. undulosus ( Jansonius and Hills, 1976: card number 3121); but the rugulae are less conspicuous in our specimens.

Other occurrences. Mexico - Ulmipollenites has been recovered from the late Eocene to early Oligocene Pie de Vaca Formation (Martíne–-Hernández and Ramírez-Arriaga, 1999); Oligocene San Gregorio Formation (Martínez-Hernández and Ramírez, 2006); Oligo-Miocene of Chiapas ( Biaggi, 1978); Neogene ( Palacios and Rzedowski, 1993); Pliocene, Paraje Solo, Veracruz ( Graham, 1975). U.S.A. – late Miocene Valentine Formation, Nebraska ( MacGinitie, 1962); late Eocene, Jackson Group, Mississippi and Alabama ( Frederiksen, 1980a); Eocene of California ( Frederiksen, 1989) and middle Miocene of Florida ( Jarzen and Klug, 2010). Initially found in the Tertiary of Germany by Wolff (1934) and Thomson and Plug (1953).

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.