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.
Microcotyle angelichthys
"Microcotyle angelichthys" was described by MacCallum in 1913 from the gills of "Holacanthus ciliaris" (Pomacanthidae ) collected at New York Aquarium. 
Tripathi (1956) created the new subgenus "Microcotyle" in which he placed "M. angelichthys". 
As Tripathi (1956) listed species within each subgenus in alphabetical order, without designating a type species, his subgeneric names and grouping were considered invalid. Unnithan (1971) placed "M. angelichthys" in the nominal subgenus "Microcotyle" as "Microcotyle (Microcotyle) angelichthys".