The researchers had found fossils of ancient insects 100 million years old in northern Brazil. The fossil is the ancestor of Schizodactylidae, wide-legged insects like crickets that are still found in South Asia, northern Indochina, and Africa.
The discovery of this fossil was published in the online journal that can be freely accessed ZooKeys. Although the characteristics are different from fossil Schizodactylidae living today, but generally almost the same characteristics. The similarity is proved that the static Schizodactylidae evolved over millions of years.
Evolution is a static event, where certain groups of organisms is only a slight genetic change in geological time span long enough. Sam Heads, insect expert at the University of Illinois, which involved the study said, Schizodactylidae static evolved since the early Cretaceous era, 100 million years ago.
Other studies also show that the environment where this ancestor lived insects like crickets are dry or seasonally dry. Heads say, "This shows, the selection of Schizodactylus habitat, the genus of crickets similar animal ancestors, has not changed for 100 million years as well.
Describe Schizodactylidae, Heads said, "This is a wide-legged crickets and large groups of insects which have kinship with the day-to-day cricket we know." Heads say, Schizodactylidae gets its name from a similar foot structure that helped him move a paddle in the sand and find prey.
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