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Exact(23)
The authors suggest it may also be appropriate to classify Archaeomarasmius more conservatively as incertae sedis (of uncertain placement) within the Tricholomatoceae, Agaricales, or Homobasidiomycetes.
However, Boyd and colleagues found that they could not assign it to either of their valid species of Thescelosaurus and regarded the specimen as of uncertain placement within the genus.
Consequently, the assignment to Mycena is provisional (the authors also note certain similarities with extant members of Marasmius), and the describing authors leave open the option of treating the genus placement as incertae sedis (uncertain placement) within the Agaricales.
The genus is usually assigned to the family Diplodocidae, though some modern analyses have found it at the base of the larger group Diplodocoidea or as a diplodocid incertae sedis (uncertain placement).
Because of its uncertain placement, its disruptive effect on resolution throughout the kinetoplastid clade, and the fact that A. rosea is not a euglenozoan, this sequence was removed from the alignment for further analysis.
In addition to the abovementioned holoparasites, another group with uncertain placement is Balanophorales.
Similar(37)
Reviewing the genus Nectomys in 1944, Philip Hershkovitz listed N. hammondi among species of Nectomys incertae sedis (of uncertain position), and considered its placement in Nectomys as dubious.
Early restorations of Waptia fieldensis by Charles R. Knight in 1940 erroneously depicted it as a primitive shrimp, but modern paleontologists now consider it among the Burgess Shale arthropods that are of unknown and uncertain taxonomic placement.
An Adams consensus of the 28 MPTs reveals that much of this poor resolution can be attributed to the uncertain phylogenetic placement of Phoenicopterus.
An example of the former is found in the uncertain phylogenetic placement of three small divergent genera [Blastomussa (2 spp), Physogyra (1 spp), and Plesiastrea (2 spp)].
Xanthophyllomyces dendrorhous is a basal agaricomycete with uncertain taxonomic placement, known for its unique ability to produce astaxanthin, a carotenoid with antioxidant properties.
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