"Neopterygii" Natural Recordings by Native Speakers
Neopterygii is a clade of ray-finned fishes that includes most modern bony fishes. It is a term used in evolutionary biology and paleontology to describe a group of fish that evolved from a common ancestor around 300-400 million years ago.
The term "Neoproterozoic" refers to the last phase of the Proterozoic eon, which is the time period extending from approximately 1,000 to 541 million years ago. During this era, the Earth's oceans were largely devoid of oxygen, and life was largely confined to single-celled organisms. The Neoproterozoic era is often referred to as the "snowball Earth" era because of widespread glacial coverage and extreme cold temperatures.