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The database is hosted by Kiel University
and is established by Magda Wieckowska-
Lüth, Wiebke Kirleis and Kay Schmütz,
Institute for Prehistoric and Protohistoric Archaeology.

© Wieckowska-Lüth/Kirleis/Schmütz 2020

Type: UG-1264

Category: Pteridophyta

Taxonomical identification: Pteris sp.

First publication: Gelorini, V., Verbeken, A., van Geel, B., Cocqyt, C. and Vershuren, D. (2011) Modern non-pollen palynomorphs from East African lake sediments. Review of Palaeobotany and Palynology 164, 143–173

Other publication/s:
Tryon, A.F. and Lugardon, B. (1990) Spores of the Pteridophyta. Surface, wall structure, and diversity based on Electron Microscope Studies. Springer-Verlag, New York
Verdcourt, B. (2002) Pteridaceae. In: Beentje, H.J. and Ghanzanfar, S.A. (eds.), Flora of Tropical East Africa. A.A. Balkema, Rotterdam-Brookfield

Description: Spores tetrahedral-globose, brown, 62 × 52 μm, surface covered with a very distinct coarse reticulum, with ridges (up to 2.5 μm tall) partly connected to each other and large papillae (2.5 μm in diameter) within areolae, trilete scarwith long arms (3/4 the radius). The large papillae or tubercles within the aureolae of some Pteris spores (e.g., P. vittata L. and P. longifolia L.) are remarkably similar to those of Onychium species.

(Sub-) Fossil occurence: No information

Co-occurence: No information

Modern occurence: Pteris is farmore common in East Africa than Onychium, which is mostly distributed in the Sikkim–Himalayan area and southwest China. Pteris is widespread in tropical, subtropical and warm temperate regions and occurs in diverse habitat ranging from river banks, wet evergreen forest and stream-side vegetation to drier areas on limestone outcrops (Tryon and Lugardon, 1990; Verdcourt, 2002).

Palaeoenvironmental indication: No information