Microglia
Research has discovered dystrophic (defective development) human microglia. "These cells are characterized by abnormalities in their cytoplasmic structure, such as deramified, atrophic, fragmented or unusually tortuous processes, frequently bearing spheroidal or bulbous swellings." The incidence of dystrophic microglia increases with aging. Microglial degeneration and death have been reported in research on Prion disease, Schizophrenia and Alzheimer's disease, indicating that microglial deterioration might be involved in neurodegenerative diseases. A complication of this theory is the fact that it is difficult to distinguish between "activated" and "dystrophic" microglia in the human brain.
Micropsalliota
The genus was circumscribed by Austrian mycologist Franz Xaver Rudolf von Höhnel in 1914 with "Micropsalliota pseudovolvulata" as the type species. This species was collected in 1907 by Höhnel in the Bogor Botanical Gardens in Bogor, Indonesia. The generic name refers to the similarity of the slender fruitbodies to those in "Psalliota" (a genus that has since been synonymized with "Agaricus"). Emendations were made to the genus in 1969 by Pegler and Rayner, and then in 1976 by Heinemann. Molecular phylogenetics has shown that the genus represents a monophyletic lineage in the family Agaricaceae that is sister to the genus "Hymenagaricus".