Corsinipollenites sp. 1

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 : 21

Corsinipollenites sp. 1

Figure 4.1

Material. Samples Pb-9343, Pb-9340, and Pb- 9334, Palynology Laboratory, IGLUNAM.

Description. Monad pollen, isopolar, radiosymmetric, amb triangular. Triporate, annulate, annulus 7 P m thick, pores aspidate with granulate structure. Exine tectate, 1–1.6 P m thick, psilate, with microreticular endopattern.

Dimensions. Equatorial diameter 24–38.4 µm, four specimens measured.

Comparisons. Corsinipollenites . sp. 1 (in this paper) shows smaller dimensions and more aspidate pores compared to Corsinipollenites sp. 2 and Corsinipollenites sp. 3 of the Cuayuca assemblage. Corsinipollenites sp.1 has a more protruding pore and annuli thicker than those reported by Jaramillo and Dilcher (2001) which have annulus 2 P m thick, as well as that recovered from middle Eocene of Florida, with annulus 2–4 P m wide ( Jarzen and Klug, 2010).

Other occurrences. In Mexico, the genus is reported to be from late Eocene to early Oligocene Pie de Vaca Formation ( Martínez-Hernández and Ramírez-Arriaga, 1999); Oligocene San Gregorio Formation (Martínez-Hernández and Ramírez-Arriaga, 2006). Jaramillo and Dilcher (2001) reported Corsinipollenites in the Paleocene of Colombia; it is also mentioned in the Paleocene of Merida Andes, western Venezuela ( Pocknall and Jarzen, 2009) and in the early to middle Eocene from Pine Island, Florida ( Jarzen and Klug, 2010) and Oligocene of Germany ( Thiergart, 1940). More data on the distribution of this genus in the U.S.A. and northern South America is in Jarzen and Klug (2010).

Figures

FIGURE 4. Angiosperm pollen grains from the Cuayuca Formation. 1, Corsinipollenites sp. 1, Pb–9334(1): EF G33/ 3; 2, Corsinipollenites sp. 3, Pb–9334(4): EF R36/1; 3, Corsinipollenites sp. 2, Pb–9334(4): EF T35/3; 4-5, Margocolporites sp., Pb–9340(1): EF N35/3; 6, Margocolporites aff. vanwijhei, Pb-9334(1'): EF T39/2; 7, Monocolpopollenites aff. texensis Nichols, Ames and Traverse 1973 Pb–8872(1A): EF W29/1; 8-9 Rhoipites sp., Pb–8890(1):101.9/17.2; 10, Lymingtonia sp., Pb–9334(4): EF S32/4; 11, Momipites tenuipolus Pb-9334(4): 101.6/12.5; 12, Momipites coryloides, Pb-9138’(1): 92.2/2.8; 13, Fabaceae pollen type 3, Pb–9334(4): EF M34/4; 14, Clavainaperturites sp., Pb– 9147(2): EF R34/2; 15, Linum pollen type, Pb–9334 (1’): EF S33/2; 16, Magnaperiporites sp., Pb–9334(4): EF R39/2; 9. Scale bar represnts 10 µm.