Tubulifloridites 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 : 14

Tubulifloridites sp.

Figure 5.17

Material. Samples Pb-9138, Pb-9340, Pb-8896, Pb-8897, Pb-8871, Pb-9141, Pb-8868, Pb-8869, Pb-9136, Pb-8870, and Pb-9147, Palynology Laboratory, IGLUNAM.

Description. Monad pollen, isopolar, radiosymmetric, amb circular. Tricolporate. Exine tectate, columellate, 4 µm thick, cavate, echinae columellate at the base, conical, 4 µm long x 3 µm wide at the base, distance between echinae 4–5 µm.

Dimensions. Equatorial diameter 20–23 µm, three specimens measured.

Comparisons. Compositae specimens have been recovered from the Monterrey Formation (Miocene), although they are larger ( Srivastava, 1984: 40 µm) with echinae 6 µm high ( Srivastava, 1984). Other occurrences. Compositae specimens have been reported in Mexico – Eocene of Baja California ( Cross and Martínez-Hernández, 1980). U.S.A. – late Miocene Valentine Formation, Nebraska ( MacGinitie, 1962). Originally described from the Tertiary of Australia ( Cookson, 1947) and Germany ( Potonié, 1960).

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.