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Description
H. testudo is a neotenic species of diving beetle that existed 25 million of years after the climatic stabilization, They lived on the coasts of what was Eurasia, they hunted by hiding in the sand and ambushing small fish that passed over them. They were some of the most successful aquatic invertebrates of the time, mating twice a year and having an extremely long life expectancy for an insect.

Description
H. testudo is a neotenic species of diving beetle that existed 25 million of years after the climatic stabilization, They lived on the coasts of what was Eurasia, they hunted by hiding in the sand and ambushing small fish that passed over them. They were some of the most successful aquatic invertebrates of the time, mating twice a year and having an extremely long life expectancy for an insect.