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The term incertae sedis refers to uncertainty about phylogenetic position of a taxon, which may be expressed, among others, by using a question mark after or before a taxon name.
As a family, Incertae Sedis does not have a specific taxonomy or classification. Instead, it is a category used for plants that cannot be classified into any known family due to incomplete information or mismatching characteristics.
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.
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.
Opisthokont characteristics include synthesis of extracellular chitin in exoskeleton, cyst/spore wall, or cell wall of filamentous growth and hyphae; the extracellular digestion of substrates with osmotrophic absorption of nutrients; and other cell biosynthetic and metabolic pathways.
Sep 14, 2015 · incertae Sedis - Family VIII. First published: 14 September 2015. https://doi.org/10.1002/9781118960608.fbm00146. †. Published by John Wiley & Sons, Inc., in association with Bergey's Manual Trust. Read the full text. PDF.
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Incertae sedis —"of uncertain position (seat)"—is a term used to define a taxonomic group where its broader relationships are unknown or undefined.
