Lusistemon K.R.Pedersen, Balthazar, P.R.Crane et E.M.Friis

Plant Fossil Names Registry Number: PFN002029


Authors: K. R. Pedersen, M. von Balthazar, P. R. Crane & E. M. Friis

Rank: genus

Reference: 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.

Page of description: 178

Type taxon

Lusistemon striatus K.R.Pedersen, Balthazar, P.R.Crane et E.M.Friis

Original protologue

Staminate flower with six small tepals and six stamens of different sizes and apparently placed opposite the tepals. Anthers basifixed, attached to filament without distinct joint; filaments free from each other. Anthers dithecal and tetrasporangiate; thecae placed laterally; anther dehiscence by longitudinal slits. Connective poorly developed between thecae, but extended apically into a short protrusion. Pollen tricolpate, tectate and striate with dichotomising and sometimes anastomosing muri that are ornamented with minute, transversely oriented ridges. Infratectal layer thin, granular and forming a fine internal reticulum; foot layer thin.


Composed of Lusitania (old Roman name for Portugal) and stemon (gr. thread) referring to the staminate nature of these Portuguese fossil flowers.

Plant fossil remain

macro- and meso-fossils-embryophytes except wood

Names associated with genus

Lusistemon striatus K.R.Pedersen, Balthazar, P.R.Crane et E.M.Friis 2007