Lymingtonia 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 : 11

Lymingtonia sp.

Figure 4.10

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

Description. Monad pollen, apolar, radiosymmetric, spherical. Pericolpate, 12 costate colpi 7.9–19 µm long and 2.4–4 µm wide, with microverrucate on membrane. Exine semitectate, columellate, 0.8 µm thick, microreticulate.

Dimensions. Diameter 28–31 µm, four specimens measured.

Comparisons. The Lymingtonia sp. described herein is smaller than L. rhetor ( Erdtman, 1972: 50 µm), although both have perforations of similar dimensions: about 1.0 µm wide ( Jansonius and Hills, 1976: card number 1562). L. cenozoica , described by Pocknall and Mildenhall (1984) from New Zealand, has smaller perforations (<5 µm), a sparsely conate/spinulose ornamentation and raised crater–like punctae; in contrast, our specimens are microreticulate.

Other occurrences. This genus has been recovered in the U.S.A. – early Eocene of Tennessee ( Elsik and Dilcher, 1974); late Eocene of Jackson Group, Mississippi and Alabama ( Frederiksen, 1980a). Caribbean islands – middle Miocene of the Saramaguacán Formation, Cuba (Graham, 2000; Graham et al., 2000).

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.