hynerpeton การใช้

• Though capable of terrestrial movement, " Hynerpeton " have to remain near water to keep moist and reproduce.
• The new fossils include bits of a skull and a complete shoulder of the amphibian, which has been named Hynerpeton bassetti.
• Despite his untimely death, the " Hynerpeton " eggs were successfully fertilized and sink into the water to develop.
• From an analysis of the shoulder, the researchers determined that the Hynerpeton had made substantial evolutionary strides from its exclusively marine past.
• A short sequence depicts " Cephalaspis " evolving into " Hynerpeton ", amphibian-like tetrapods, who now hunt their arthropod contemporaries which have shrunk.
• In any event, it was another 25 million years after Hynerpeton before some amphibians evolved into reptiles, the first truly terrestrial vertebrates and the remote ancestors of birds and mammals, including humans.
• But pioneers like Hynerpeton seemed to live in streams and marshes, probably using their stubby limbs to maneuver in shallow water and their lungs to gulp air in the absence of sufficient oxygen in the water.
• The Late Devonian saw the evolution of plants into trees and growing into vast forests pumping oxygen into the air, possibly giving " Hynerpeton " an edge because it evolved complex lungs to exploit it.
• If these remains are from a whatcheeriid, they extend the range of the family into the Late Devonian and suggest that advanced tetrapods may have lived alongside primitive tetrapod ancestors like " Hynerpeton " and " Densignathus ".
• A lone male " Hynerpeton " hunting underwater is threatened by predatory fish, at first by a " Stethacanthus " which is eaten by a two-ton " Hyneria " that chases the amphibian out of the water.
• Because of the many differences between Hynerpeton and other early amphibians, Daeschler said, " we can see that at this point in time, there was a diversity of the types of animals experimenting in ways to adapt to living on land ."
• Shubin said that it was not yet clear if the advanced features of Hynerpeton meant that the earliest amphibians had evolved quickly to exploit opportunities open to them on land, or if the transition had begun much earlier than 370-to-380 million years ago and proceeded slowly, though the fossils for these early stages are still missing.
• Paleontologist Michel Laurin took up the older term and defined stegocephalians cladistically as all vertebrates more closely related to temnospondyli than to " Panderichthys " ( the closest relative of tetrapods known to have retained paired fins, see below ) Therefore, Stegocephalia includes all vertebrate groups that have toes rather than fins, and a few ( " Elginerpeton ", " Metaxygnathus ", " Ventastega " and possibly " Hynerpeton " ) that may have retained paired fins.