Grana

Pedersen, K. R., Crane, P. R. & Friis, E. M. (1989): Pollen organs and seeds with Eucommiidites pollen. – Grana 28: 279–294.

Friis, E. M., Crane, P. R. & Pedersen, K. R. (1997): Anacostia, a new basal angiosperm from the Early Cretaceous of North America and Portugal with trichotomocolpate/monocolpate pollen. – Grana 36: 225–244.

Pedersen, K. R., von Balthazar, M., Crane, P. R. & Friis, E. M. (2007): Early Cretaceous floral structures and in situ tricolpate-striate pollen: New early eudicots from Portugal. – Grana 46(3): 176–196.

Mendes, M. M., Pais, J. & Friis, E. M. (2008): Raunsgaardispermum lusitanicum gen. et sp. nov., a new seed with in situ pollen from the Early Cretaceous (probably Berriasian) of Portugal: Further support for the Bennettitales-Erdtmanithecales- Gnetales link. – Grana 47(3): 211–219.

Kvaček, J. & Friis, E. M. (2010): Zlatkocarpus gen. nov., a new angiosperm reproductive structure with monocolpate-reticulate pollen from the Late Cretaceous (Cenomanian) of the Czech Republic. – Grana 49(2): 115–127.

Mendes, M. M., Pais, J., Pedersen, K. R. & Friis, E. M. (2010): Erdtmanitheca portucalensis, a new pollen organ from the Early Cretaceous (Aptian–Albian) of Portugal with Eucommiidites-type pollen. – Grana 49(1): 26–36.

Friis, E. M. & Pedersen, K. R. (2011): Canrightia resinifera gen. et sp. nov., a new extinct angiosperm with Retimonocolpites-type pollen from the Early Cretaceous of Portugal: missing link in the eumagnoliid tree? – Grana 50: 3–29.

Friis, E. M., Pedersen, K. R. & Marone, F. (2014): Arcellites punctatus sp. nov.: a new megaspore from the Early Cretaceous of Portugal studied using high resolution synchrotron radiation X-ray tomographic microscopy (SRXTM). – Grana 53(2): 91–102.

Friis, E. M., Pedersen, K. R. & Crane, P. R. (2014): Welwitschioid diversity in the Early Cretaceous: evidence from fossil seeds with pollen from Portugal and eastern North America. – Grana 53(online)(3): 175–196.

Mendes, M. M., Grimm, G. W., Pais, J. & Friis, E. M. (2014): Fossil Kajanthus lusitanicus gen. et sp. nov. from Portugal: floral evidence for Early Cretaceous Lardizabalaceae (Ranunculales, basal eudicot). – Grana 53(4): 283–301.

Friis, E. M., Grimm, G. W., Mendes, M. M. & Pedersen, K. R. (2015): Canrightiopsis, a new Early Cretaceous fossil with Clavatipollenites-type pollen bridge the gap between extinct Canrightia and extant Chloranthaceae. – Grana 54(3): 184–212.

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.

Friis, E. M., Pedersen, K. R. & Crane, P. R. (2017): Kenilanthus, a new eudicot flower with tricolpate pollen from the Early Cretaceous (early-middle Albian) of eastern North America. – Grana 56(3): 161–173.

Friis, E. M., Mendes, M. M. & Pedersen, K. R. (2018): Paisia, an Early Cretaceous eudicot angiosperm flower with pantoporate pollen from Portugal. – Grana 57(1–2): 1–15.