Costatoperforosporites friisiae M.M.Mendes, E.Barrón, Batten et Pais

Plant Fossil Names Registry Number: PFN001996


Authors: M. M. Mendes, E. Barrón, D. J. Batten & J. Pais

Rank: species

Reference: Mendes, M. M., Barrón, E., Batten, D. J. & Pais, J. (2017): A new species of the spore genus Costatoperforosporites from Early Cretaceous deposits in Portugal and its taxonomic and palaeoenvironmental significance. – Grana 56(6): 401–409., link

Page of description: 406

Illustrations or figures: figs 3, 4


Holotype CAT/S-52/MS1, Geological Museum of Lisbon, Portugal
Figures: fig. 3

Note: Holotype from the sample Catefica 52.

Inventory number is slide number.

Original diagnosis/description

Trilete spores, convexly triangular to sub-circular in equatorial outline. Laesurae extend to more than two-thirds radius of spore, flanked by distinct membranous lips. Proximal and distal surfaces canaliculate, comprising sets of closely spaced, broad, flat-topped, muri arranged parallel to spore contour on proximal face, commonly in whorls in equatorial regions, and forming a spiral pattern about distal pole. Individual muri are c. 5.0–8.0 μm thick separated by grooves c. 0.5–2.0 μm wide. Mural structure distinctly microporate; micropores also occur in between muri, arranged alternately on either side of grooves.


In honour of Professor Else Marie Friis, Swedish Museum of Natural History, Stockholm, for her major contributions on the Early Cretaceous floras of Portugal.


Cretaceous, Lower Cretaceous
Almargem Formation (probably late Aptian-early Albian)


Catefica outcrop, near Torres Vedras, Estremadura region, western Portugal (39° 3′ 16″ N; 09° 14′ 24″ W)

Plant fossil remain

pollen and spores


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