What are some Ordovice organisms?

Ordovice organisms lived during the Ordovice period, which lasted between approximately 488.3 to 443.7 million years. It began with a mass extinction called Cambrian-ordovician extinction, which erased 50% of all multicellular organisms in a fossil record. At that time, all known multicellular organisms were exclusively sea. The number of known fossils from the Ordovice numbers of about 500, significantly more than 200 available from Cambrian before him. The extinction of the mass of the end Cambrians was seriously influenced by brachiopods (stationary shell body superficially reminiscent of silence), trilobits (which have never been the same) and early foreheads called Conodonts. During Ordovik, other animals such as brachiopod articulations, cephalopods (Sophisticed Mollusks), and Crinoids (Sea Lilies) were largely replaced by the Cambrian animals that came before them. Most remarkably, articulate brachiopods almost completely displaced trilobites in the shallow seas, where they both lived. These organisms would continue to control the sea FAUnů for the rest of the paleozoic era.

Although the trilobites were not as successful as they were during Cambrian, they were still numerous and diverse and shared the lower part of the food chain with articulated brachiopods. During this time, many gastropods (snail animals) developed. Numerous fish with jaws appeared at the end of the period, with jaw forms. Ordovik saw the development of the first corals and the first coral reefs, the first cliffs that were built in tens of millions of years, since the prospering of ancient archaeocyathides during the early Cambrian. Ordovicic layer of are full of graptolites, remnants of colonial sea animals called worms.

Ordovik was marked by the emergence of the first animals with a sophisticated nervous system and a large amount of brain tissue, as evidenced by fossils of nautiloid cephalopods, the dominant predators of the period. These relatively intelligent, tentacle with big eyes, tVrdé shells, moths to get out of the earlier predators of peaks such as anomalocarides. During the late Cambrian, large cephalopods appeared, but in the whole Ordovicici they were very diversified.

Ordovik saw the emergence of the first plants of land, non -acculndential plants that would resemble modern lichens, liver and moss. These simple plants tend to cluster close to the sea or streams. There were no terrestrial animals from the body, although during this period some of the first earthly trace fossils appear, probably made by early myriapodyjako Millipedes. The oldest currently known land animal fossil is 1 cm fossil Millipede dated 428 million years ago, just 16 million years after the period. Ordovicic fossils of earthly animals can still be discovered.

discovery of fungal hyfs strongly reminiscent of a special type of mushroom found in the roots of most of all plants suggests that this ancient symbiotic relationshipHe started during Ordovik.