known discovery of a preserved plasmodium was found in Dominican amber, and was then grouped into the Physarida. However, this claim is also considered doubtful as the publication was later classified as insufficient due to lack of evidence. In 2019 sporocarps belonging to Stemonitis was described from Burmese amber, considered to be of a Mid Cretaceous age around 99 million years old. The sporocarps are indistinguishable from extant taxa, suggesting a long morphological stasis. The only known mineralised fossils are the two spore findings from 1971, one of which, Trichia favoginea, is assumed to be from the postglacial period. In palynologian researches, by absorbing Myxogastria spores, the fossil was not recognised. History of research Because of their unprepossessing nature, the Myxogastriae were for a long time not well researched. Thomas Panckow first named the mould Lycogala epidendrum as "Fungus cito crescentes" (fast-growing fungus) in his 1654 book Herbarium Portatile, oder behendes Kräuter- und Gewächsbuch. In 1729, Pier Antonio Micheli thought that fungi are different from moulds, and Heinrich Friedrich Link agreed with this hypothesis in 1833. Elias Magnus Fries documented the plasmodial stage in 1829, and 35 years later Anton de Bary observed the germination of the spores. De Bary also discovered the cyclosis in the cell for the movement, he saw them as animal-like creatures and reclassified them as Mycetozoa, which literally translates "Fungus animals". This interpretation prevailed until the second half of the 20th century. From 1874 to 1876, Józef Tomasz Rostafiński, a student of Anton de Bary, published the first extensive monograph on the group. Three monographs by Arthur Lister and Guilielma Lister were published in 1894, 1911, and 1925. These were groundbreaking works about the Myxogastria, as was the 1934 book The Myxomycetes by Thomas H. Macbride and George Willard Martin. Important works in the late 20th century were the 1969 monographs by George Willard Martin and Constantine John Alexopoulos, and the 1975 monograph by Lindsay Shepherd Olive. The first is perhaps the most notable, as with it "the modern era of the taxonomy of the Myxogastria began". Other notable researchers were Persoon, Rostafinski, Lister, Macbridge, and Martin and Alexopoulos, who discovered and classified many species. Notes References Amoebozoa classes