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Examples. The fossil plant Paradinandra suecica could not be assigned to any family, but was placed incertae sedis within the order Ericales when described in 2001. The fossil Gluteus minimus, described in 1975, could not be assigned to any known animal phylum. The genus is therefore incertae sedis within the kingdom Animalia.
- Vojnovskyales: Vojnovskya paradoxa, a gymnosperm of uncertain affinity, has been reported from the Lower Permian rocks of Palaeozoic era of the Pechora basin of the former USSR, and Nevberg (1965) placed it in a new order Vojnovskyales, which is still awaiting a proper placing in any recognized gymnospermous group.
- Rhexoxylon: Rhexoxylon is a fossil gymnospermous stem with uncertain affinities. Four species of this stem- genus have been reported from different parts of the world.
- Nucellangium: Nucellangium, another perplexing genus awaiting a proper placing in the well-defined gymnospermous groups, has been reported by Andrews (1949) from the Upper Carboniferous coal balls near Des Moines (Iowa, USA).
- Hydropteridangium: Hydropteridangium marsiloides is a fossil genus of still uncertain affinity. It has been described from the Rhaetic-Liassic rocks of East Greenland by Harris (1931).
Nov 5, 2011 · CHAPTER XXVII - GENERA OF PTERIDOSPERMS, FERNS, AND PLANTAE INCERTAE SEDIS. Published online by Cambridge University Press: 05 November 2011. A. C. Seward. Chapter. Get access. Cite.
The Incertae Sedis family is a classification used for plants that have not yet been placed into a specific family. This may be due to insufficient information about its morphology, genetics or evolutionary history.
Mar 1, 2021 · I’ll use a leafhopper Incertae sedis species group as an example, since my interest is in Auchenorrhyncha. The Australian species evansi is currently placed in species group Erythroneurini-Incertae sedis, the placement for a number of species in the tribe.
For example, if the phylogeny was constructed using soft tissue and vertebrae as principal characters and the taxon in question is only known from a single tooth, it would be necessary to label it incertae sedis.
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Are there any Plantae incertae sedis?
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Why is a taxon labeled incertae sedis?
Why is a scientific publication called incertae sedis?
In taxonomy, the term incertae sedis (abbreviated inc. sed.) is used for a taxon when its broader relationship to other taxa is unknown. The first person who used the term in botany was probably Antoine-Laurent de Jussieu. In his book Genera Plantarum of 1789 he listed a few plantae incertae sedis.
