👉 Austrolestes is a term used in the field of evolutionary biology, specifically within the classification of vertebrates (animals with backbone and four limbs), particularly fish. It describes the development of vertebrate embryos from eggs that are initially egg-laying type rather than ovoviviparous. This allows for an early stage where all of the basic structures, including the nervous system, lungs, heart, and reproductive organs, have been fully developed, which is crucial for their survival in aquatic
