Clavatipollenites-

Friis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard, Mendes, Mário Miguel & Kvaček, Jiří, 2022, The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms, Fossil Imprint 78 (2), pp. 341-424 : 357-360

publication ID

https://doi.org/ 10.37520/fi.2022.016

DOI

https://doi.org/10.5281/zenodo.13919446

persistent identifier

https://treatment.plazi.org/id/03FD87F2-FFED-FFFD-FCC9-F893C20CF792

treatment provided by

Felipe

scientific name

Clavatipollenites-
status

 

Stamens with monocolpate Clavatipollenites- type pollen sp. 3

Text-fig. 12a–e View Text-fig

Description and remarks. The material comprises a single stamen with an elongated, elliptical and tetrasporangiate anther ( Text-fig. 12a View Text-fig ) that has in situ Clavatipollenites - type pollen ( Text-fig. 12b–e View Text-fig ). The anther is about 0.5 mm long and about 0.25 mm broad. Pollen is monoaperturate, but the grains are typically folded and the aperture is not fully exposed in any of the specimens. The grains are about 15–17 µm in diameter. The exine is semitectate-reticulate with a homobrochate reticulum ( Text-fig. 12b–e View Text-fig ). Lumina are irregular and up to about 1.5 µm in diameter. Muri are narrow, about 0.4 µm wide and ornamented with verrucae or spines arranged in one to two rows. Columellae are long, about 0.7 µm, and widely spaced ( Text-fig. 12d View Text-fig ). Orbicules on the inner surface of the anther wall and on the surface of the pollen grains are tiny, spherical and with fine spines ( Text-fig. 12e View Text-fig ).

Affinity and other occurrences. See comments on “Stamens with monocolpate Clavatipollenitestype pollen sp. 1” above.

S

Department of Botany, Swedish Museum of Natural History

Affinity

Harvard University - Arnold Arboretum

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