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Les chordés ou cordés (Chordata) forment un embranchement d' animaux du clade des bilatériens et appartenant au super-embranchement des deutérostomiens. Leur nom provient de la notochorde, une lamelle cartilagineuse située sur le côté dorsal de l'animal, forme la plus élémentaire d'un endosquelette (squelette interne).
Les traits caractéristiques de Chordata sont une notocorde, un cordon nerveux creux dorsal, des fentes pharyngées et une queue postanale. Les chordata contiennent deux clades d'invertébrés : les Urochordata (tuniciers) et les Cephalochordata (lancelets), ainsi que les vertébrés de Vertebrata.
Cette page a pour objet de présenter un arbre phylogénétique des Chordata (Chordés ou Cordés), c'est-à-dire un cladogramme mettant en lumière les relations de parenté existant entre leurs différents groupes (ou taxa), telles que les dernières analyses reconnues les proposent.
Apr 12, 2021 · PDF | On Apr 12, 2021, Veronica Slobodian and others published Vertebrates (Chordata) | Find, read and cite all the research you need on ResearchGate.
A chordate (/ ˈkɔːrdeɪt / KOR-dayt) is a deuterostomic bilaterial animal belonging to the phylum Chordata (/ kɔːrˈdeɪtə / kor-DAY-tə). All chordates possess, at some point during their larval or adult stages, five distinctive physical characteristics (synapomorphies) that distinguish them from other taxa.
Nov 22, 2005 · To date, most evo-devo studies of chordates have fallen into two categories: the first is the use of developmental gene expression to determine body part homologies among the major chordate groups, and the second is structural comparison of gene families to study gene duplication as an evolutionary mechanism.
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Chordates consist of three distinct animal groups: cephalochordates, urochordates (tunicates) and vertebrates. This review starts with a brief description of how the Phylum Chordata and its three subphyla were originally defined, and then discusses how we should reclassify the major chordate groups. 2.
