A teenaged Thomas Emmel first collected what is now known as cyllopsis tomemmeli in 1959.
Some tardigrades can survive extreme radiation, air deprivation and even the vacuum of space.
Too much testosterone might explain her new growth.
The animals were gathered from depths of up to 16,000 feet by the research ship Investigator during a month-long voyage in 2017.
Scientists get “unprecedented view” of how the fungal parasite takes control of an ant’s body.