Mutisiapollis 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

Mutisiapollis sp.

Figure 5.7, 5.11

Material. Sample Pb-8872, Palynology Laboratory, IGLUNAM.

Description. Monad pollen, isopolar, radiosymmetric, prolate. Tricolporate, endoaperture lalongate, 12 µm x 4.8 µm. Exine tectate, columellate, clearly stratified with two layers, 3.2 µm thick in the mesocolpi, and 2.4 µm in the apocolpi, supramicroechinate, echinae <0.5 µm high.

Dimensions. Equatorial diameter 24.8 µm, polar diameter 38.4 µm, one specimen measured.

Comparisons. M. viteauensis Barreda et al., 1998 from the Miocene “Serie del Yeso” of Argentina has a thicker exine ( Barreda et al., 1998: 3.5 to 6 µm) and spines less than 1 µm high. However, Mutisiapollis sp. from the Cuayuca Formation has lalongate endoapertures with dimensions similar to those of M. viteauensis .

Other occurrences. There are no records of this taxon in Mexico. Mutisieae pollen grains have been recovered from the Miocene Gatun Formation, Panamá ( Graham, 1990a) and in Argentina from the Miocene of San Juan Province ( 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.