Four species of mushroom fossils believed to be 99 million years old have been found in China, the earliest complete mushroom fossils ever found.
Palaeontologists from China, New Zealand and the US have found the four species of mushroom.
The mushrooms, well preserved in Burmese amber for at least 99 million years, are the earliest complete mushroom fossils ever found, state-run Xinhua news agency reported.
A stalk and a complete cap containing distinct gills are visible in most of the mushrooms, which are two to three millimeters long.
The research team led by Professor Huang Diying from Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, reported the finding after researching more than 20,000 pieces of Burmese amber collected over 10 years.
The team also found three kinds of rove beetle, which feed on mushrooms, in pieces of amber 125 million years old.
The discovery highlights the palaeo-diversity of mushrooms, pushing back the presence of agaric mushrooms by at least 25 million years, the report said.
Mushrooms are common and morphologically diverse fungi.
Their bodies are soft and ephemeral and therefore extremely rare in fossils. Until the recent discovery, only five species of mushrooms were known exclusively from amber.
Among the previous five species, one was found in a 99-million-year-old piece of damaged Burmese amber, another in a 90-million-year-old piece of New Jersey amber and the three remaining species in 20-million-year-old Dominican amber, it said.
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