Claim · model-written summary
Tetrads of Sarcolaena or Rhodolaena appear most similar to the fossil taxon, also ultrastructurally.
- Taxon
- Sarcolaena or Rhodolaena
Sarcolaena
Rhodolaenae0 - Outcome
- appear most similare0
Verbatim
e0“The tetrads of Sarcolaena or Rhodolaena appear most similar, also ultrastructurally to the fossil taxon”
Title
On the Origin of the Sarcolaenaceae with Reference to Pollen Morphological Evidence
Siwert Nilsson; Joanna Coetzee; Elisabeth Grafström Grana 1996. doi:10.1080/00173139609429091
Other claims from this paper (9)
- Observation Fossil pollen assemblages indicate an early Miocene subtropical rainforest in South Africa in which Sarcolaenaceae were well represented.
- Observation Leptolaena and Xyloolaena show similarities to the fossil taxon to a lesser degree.
- Observation Eremolaena, Schizolaena, Pentachlaena and Perrierodendron are totally different from the fossil taxon.
- Observation The fossil Sarcolaenaceae tetrads could suggest an African origin for the family.
- Observation The profound vegetation change in the region was apparently complete by the early Pliocene.
- Mechanism Major climatic change in the Antarctic region towards the end of the Miocene may have caused the elimination of the subtropical forest in South Africa.
- Observation Many components that became extinct in Africa are still represented in relict forests of Madagascar.
- Observation The present Knysna forest in the southern Cape is an impoverished relict of the ancient forest where Sarcolaenaceae once flourished.
- Observation In the southwestern Cape the subtropical forest was replaced by sclerophyllous vegetation.