Dating the earliest Myriapods.
[sciencythoughts.blogspot.com]
Understanding how organisms colonised the land, is crucial to clarify extant biodiversity and biological adaptation. But, evaluating the rate and pattern of land colonisation requires precise dating of the fossil of early land biotas and reconciling them with evolutionary divergence based on morphology and molecular clocks. The frequent striking inconsistency between the ages of fossils and their phylogenies limits our understanding of macroevolution, and it reduces confidence in phylogenetic inference: this is especially the case for the first land Animals. Arthropoda (Insects, Spiders, Centipedes and their allies) were the first, and are the largest group of land Animals in both numbers and biomass. The first fossil land Arthropod-Plant assemblages are rare and only found in Late Silurian (about 425 million years old) to Early Devonian (about 410 million years old) equatorial terrestrial and freshwater sediments within and marginal to the ancient Caledonian mountains which stretched from New York to Germany. The earliest fossil land Arthropods are Myriapods (Millipedes and Centipedes) from the latest Silurian (about 425 million years old) of Scotland and Wales.
4
Enjoy being online again!
Welcome to the community of good people who base their values on evidence and appreciate civil discourse - the social network you will enjoy.Create your free account
Recent Visitors 17
Photos 292 More
Posted by JoeBKite-like structures in the western Sahara Desert.
Posted by TriphidAn Aussie Indigenous Message Stick.
Posted by TriphidIndigenous Australian Aboriginal Rock art dated somewhere between 20 and 30 thousand years old.
Posted by TriphidIndigenous Australian Aboriginal Rock art dated somewhere between 20 and 30 thousand years old.
Posted by TriphidIndigenous Australian Aboriginal Rock art dated somewhere between 20 and 30 thousand years old.
Posted by TriphidIndigenous Australian Aboriginal Rock art dated somewhere between 20 and 30 thousand years old.
Posted by JoeBDortoka vremiri: A new species of Dortokid Turtle from the Late Cretaceous of the Hațeg Basin, Romania.
Posted by JoeBThe Cabeço da Amoreira burial: An Early Modern Era West African buried in a Mesolithic shell midden in Portugal.
Posted by JoeBMusivavis amabilis: A new species of Enantiornithine Bird from the Early Cretaceous Jehol Biota of northeastern China.
Posted by JoeBTorosaurus in Canada.
Posted by JoeBStone tools from the Borselan Rock Shelter, in the Binalud Mountains of northeastern Iran.
Posted by JoeBDating the Lantian Biota.
Posted by JoeBBashanosaurus primitivus: A new species of Stegosaur from the Middle Jurassic of Chongqing Municipality, China.
Posted by JoeBDetermining the time of year when the Chicxulub Impactor fell.
Posted by JoeBSão Tomé and Príncipe: Possibly the last country on Earth never to have been visited by a working archaeologist.
Posted by JoeBMambawakale ruhuhu: A new species of Pseudosuchian Archosaur from the Middle Triassic Manda Beds of Tanzania.