Kempia longicolpites E. M. FRIIS, P. R. CRANE et K. R. PEDERSEN, Mugideiriflora 2019

Autor: Friis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard, Mendes, Mário Miguel, Kvaček, Jiří
Rok vydání: 2022
Předmět:
DOI: 10.5281/zenodo.7535341
Popis: Kempia longicolpites E.M.FRIIS, P.R.CRANE et K.R.PEDERSEN, 2019 Text-fig. 30a–f D e s c r i p t i o n a n d r e m a r k s. The material comprises two adhering stamens (only one cut stamen illustrated) with dithecate, tetrasporangiate anthers (Text-fig. 30a) and in situ pollen. The stamens are about 1 mm long and 0.25 mm broad with a distinct, triangular apical extension of the connective. One stamen was cut transversely into two pieces to expose the pollen for SEM. The other stamen was removed for TEM. Stamens and anthers are closely similar to Kempia longicolpites described from the Torres Vedras locality (Friis et al. 2019a) and the specimen is assigned here to the same species. Pollen grains are small, about 11– 12 µm long, monoaperturate and with the colpus extending beyond the full length of the grains. The exine is semitectatereticulate, columellate (Text-fig. 30b–f) with the reticulum and columellae only loosely attached to the foot layer (Text-fig. 30f). The muri have a rounded profile and a smooth surface (Text-fig. 30c). The foot layer is thick, and the endexine is restricted to the apertural region (Text-fig. 30e). A f f i n i t y a n d o t h e r o c c u r r e n c e s. Kempia longicolpites was first described from the Torres Vedras locality (Friis et al. 2019a) and is currently known from only the Torres Vedras and Catefica mesofossil floras.
Published as part of Friis, Else Marie, Crane, Peter R., Pedersen, Kaj Raunsgaard, Mendes, Mário Miguel & Kvaček, Jiří, 2022, The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms, pp. 341-424 in Fossil Imprint 78 (2) on page 385, DOI: 10.37520/fi.2022.016, http://zenodo.org/record/7522801
{"references":["Friis, E. M., Crane, P. R., Pedersen, K. R. (2019 a): The Early Cretaceous mesofossil flora of Torres Vedras (NE of Forte da Forca), Portugal: a palaeofloristic analysis of an early angiosperm community. - Fossil Imprint, 75: 153 - 257. https: // doi. org / 10.2478 / if- 2019 - 0013"]}
Databáze: OpenAIRE
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