Bombacacidites sp.
publication ID |
https://doi.org/ 10.26879/465 |
persistent identifier |
https://treatment.plazi.org/id/66258796-FF84-FFEF-367A-EBC2D56BFE25 |
treatment provided by |
Felipe (2024-08-11 02:19:49, last updated 2024-08-12 12:53:37) |
scientific name |
Bombacacidites sp. |
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Figure 3.23
Material. Samples Pb-9334 and Pb-9340, Palynology Laboratory, IGLUNAM.
Description. Monad pollen, isopolar, radiosymmetric, amb tringular obtuse. Tricolporate, apertures interangular with exinal thickenings. Exine semitectate, columellate, 0.8 P m thick, reticulate, heterobochate, apocolpial lumina of 1.6 P m are larger than mesocolpial lumina <0.8 P m.
Dimensions. Equatorial diameter 21.2 µm, based on one measured specimen.
Comparisons. The Bombacacidites sp. (in this contribution) is similar in size (16–20 µm) to Bombacacidites sp. 2 in Frederiksen (1988), although the Bombacacidites sp. from the Cuayuca Formation has wider brochi (0.8 – 1.6 µm) than Bombacacidites sp. 2 from the eastern Gulf Coast ( Frederiksen, 1988: 0.5 – 1 µm). The specimen herein studied is also similar in the thickness of the exine and the width of the luminae at apocolpia to Bombacacidites sp. 2 described by Jaramillo and Dilcher (2001) from the middle Paleogene of Colombia, but differs in having a smaller equatorial diameter ( Bombacacidites sp. of Cuayuca: 21.2 µm; Bombacacidites sp. 2 : 33 to 40 µm). Another similar specimen to the Bombacacidites sp. from the Cuayuca Formation was described as middle Eocene at the Kissinger Lakes locality ( Leopold, 1974, plate 45, figures 2–3).
Other occurrences. This genus has been recorded in Mexico from the late Eocene to early Oligocene Pie de Vaca Formation, Puebla ( Martínez-Hernández and Ramírez-Arriaga, 1999). U.S.A. – middle Eocene, San Diego, California ( Frederiksen et al., 1983); Eocene and Eocene-Oligocene of the Gulf Coast (Elsik, 1974; Frederiksen, 1988); middle Eocene, Kisinger, Wyoming ( Leopold, 1974); middle Eocene from Pine Island, Florida, U.S.A. ( Jarzen and Klug, 2010).
Frederiksen, N. O., Carr, D. R., Lowe, G. D., and Wosika, E. P. 1983. Middle Eocene palynomorphs from San Diego, California. American Association of Stratigraphic Palynologists, Contribution Series, 12: 1 - 157.
Frederiksen, N. O. 1988. Sporomorph biostratigraphy, floral changes, and paleoclimatology, Eocene and early Oligocene of the eastern Gulf Coast. U. S. Geological Survey Professional Paper, 1448: 1 - 101.
Jarzen, D. M. and Klug, C. 2010. A preliminary investigation of the lower to middle Eocene palynoflora from Pine Island, Florida, U. S. A. Palynology, 34: 164 - 179.
Leopold, E. B. 1974. Pollen and spores of the Kisinger Lakes fossil leaf locality. In Mac Ginitie, H. D. An early Middle Eocene flora fron the Yellowstone - Absaroka Volcanic Province, northwestern Wind River Basin, Wyoming. University of California, Publications in Geological Science.
Martinez-Hernandez, E. and Ramirez-Arriaga, E. 1999. Palinoestratigrafia de la region de Tepexi de Rodriguez, Puebla, Mexico - implicaciones cronoestratigraficas. Revista Mexicana de Ciencias Geologicas, 16: 187 - 207.
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