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- Trilobite abstract "Trilobites (/ˈtraɪlɵbaɪt/, /ˈtrɪlɵbaɪt/; meaning "three lobes") are a well-known fossil group of extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period (521 million years ago), and they flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when, during the Devonian, all trilobite orders except Proetida died out. Trilobites finally disappeared in the mass extinction at the end of the Permian about 250 million years ago. The trilobites were among the most successful of all early animals, roaming the oceans for over 270 million years.When trilobites first appear in the fossil record they are already highly diverse and geographically dispersed. Because trilobites had wide diversity and an easily fossilized exoskeleton an extensive fossil record was left behind, with some 17,000 known species spanning Paleozoic time. The study of these fossils has facilitated important contributions to biostratigraphy, paleontology, evolutionary biology and plate tectonics. Trilobites are often placed within the arthropod subphylum Schizoramia within the superclass Arachnomorpha (equivalent to the Arachnata), although several alternative taxonomies are found in the literature.Trilobites had many life styles; some moved over the sea-bed as predators, scavengers or filter feeders and some swam, feeding on plankton. Most life styles expected of modern marine arthropods are seen in trilobites, with the possible exception of parasitism (where there are still scientific debates). Some trilobites (particularly the family Olenidae) are even thought to have evolved a symbiotic relationship with sulfur-eating bacteria from which they derived food.".
- Trilobite thumbnail Kainops_invius_lateral_and_ventral.JPG?width=300.
- Trilobite wikiPageExternalLink edward-lhwyd.
- Trilobite wikiPageExternalLink carfieldtrip.html.
- Trilobite wikiPageExternalLink latham.html.
- Trilobite wikiPageExternalLink trilobites.
- Trilobite wikiPageExternalLink trilobites.html.
- Trilobite wikiPageExternalLink ClassTrilobita.htm.
- Trilobite wikiPageExternalLink when-trilobites-ruled-the-world.html?hp.
- Trilobite wikiPageExternalLink faketrilobites1.htm.
- Trilobite wikiPageExternalLink www.paleosoc.org.
- Trilobite wikiPageExternalLink default.aspx.
- Trilobite wikiPageExternalLink www.westerntrilobites.com.
- Trilobite wikiPageID "61990".
- Trilobite wikiPageRevisionID "606680973".
- Trilobite align "right".
- Trilobite alt "Labeled diagram of major parts of the cephalon".
- Trilobite authority "Walch, 1771".
- Trilobite caption "Image of phacopidan trilobite Calymene tristani in nodule.".
- Trilobite caption "The major subdivisions of the cephalon.".
- Trilobite caption "The subdivisions can be further broken down into different areas used in describing trilobite cephalic morphology. 1 – preocular area; 2 – palpebral area; 3 – postocular area; 4 – posterolateral projection; 5 – occipital ring; 6 – glabella; 7 – posterior area; 8 – lateral border; 9 – librigenal area; 10 – preglabellar area".
- Trilobite direction "vertical".
- Trilobite hasPhotoCollection Trilobite.
- Trilobite header "Morphology of the trilobite cephalon".
- Trilobite headerAlign "center".
- Trilobite height "152".
- Trilobite image "Paradoxides sp.jpg".
- Trilobite image "Trilobite cephalon areas numbered.svg".
- Trilobite image "Trilobite cranidium-en.svg".
- Trilobite image2Caption "Paradoxides sp., late Cambrian".
- Trilobite imageCaption "Kainops invius, early Devonian".
- Trilobite name "Trilobites".
- Trilobite subdivision "*Agnostida *Asaphida *Corynexochida *Harpetida *Nectaspida *Redlichiida *Lichida *Phacopida *Proetida *Ptychopariida".
- Trilobite subdivisionRanks "Orders".
- Trilobite taxon "Trilobita".
- Trilobite width "218".
- Trilobite width "450".
- Trilobite subject Category:Arthropods.
- Trilobite subject Category:Fossils.
- Trilobite subject Category:Permian_extinctions.
- Trilobite subject Category:Prehistoric_arthropods.
- Trilobite subject Category:Prehistoric_life.
- Trilobite subject Category:Symbols_of_Ohio.
- Trilobite subject Category:Symbols_of_Pennsylvania.
- Trilobite subject Category:Symbols_of_Wisconsin.
- Trilobite subject Category:Trilobite_anatomy.
- Trilobite subject Category:Trilobites.
- Trilobite type Animal.
- Trilobite type BiologicalLivingObject.
- Trilobite type EukaryoticCell.
- Trilobite comment "Trilobites (/ˈtraɪlɵbaɪt/, /ˈtrɪlɵbaɪt/; meaning "three lobes") are a well-known fossil group of extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods.".
- Trilobite label "Trilobieten".
- Trilobite label "Trilobita".
- Trilobite label "Trilobita".
- Trilobite label "Trilobita".
- Trilobite label "Trilobita".
- Trilobite label "Trilobite".
- Trilobite label "Trilobiten".
- Trilobite label "Trylobity".
- Trilobite label "Трилобиты".
- Trilobite label "ثلاثي الفصوص".
- Trilobite label "三葉虫".
- Trilobite label "三葉蟲".
- Trilobite sameAs Trilobiti.
- Trilobite sameAs Trilobiten.
- Trilobite sameAs Τριλοβίτης.
- Trilobite sameAs Trilobita.
- Trilobite sameAs Trilobita.
- Trilobite sameAs Trilobita.
- Trilobite sameAs Trilobit.
- Trilobite sameAs Trilobita.
- Trilobite sameAs 三葉虫.
- Trilobite sameAs 삼엽충.
- Trilobite sameAs Trilobieten.
- Trilobite sameAs Trylobity.
- Trilobite sameAs Trilobita.
- Trilobite sameAs m.0gs3g.
- Trilobite sameAs Q17170.
- Trilobite sameAs Q17170.
- Trilobite wasDerivedFrom Trilobite?oldid=606680973.
- Trilobite depiction Kainops_invius_lateral_and_ventral.JPG.
- Trilobite isPrimaryTopicOf Trilobite.