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Os cordados ( Chordata, do latim chorda, corda) constituem um filo dentro do reino Animalia que inclui os vertebrados, os anfioxos e os tunicados. Estes animais são caracterizados pela presença de uma simetria bilateral, notocorda, sistema digestivo completo, um tubo nervoso dorsal, fendas branquiais e uma cauda pós-anal, em pelo menos uma ...
A chordate ( / ˈkɔːrdeɪt / KOR-dayt) is a deuterostomic 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.
The Cambrian chordates are an extinct group of animals belonging to the phylum Chordata that lived during the Cambrian, between 538 and 485 million years ago. The first Cambrian chordate known is Pikaia gracilens, a lancelet -like animal from the Burgess Shale in British Columbia, Canada.
This article contains a list of all of the classes and orders that are located in the Phylum Chordata . Subphylum Cephalochordata. Class Leptocardii: Lancelets. Lancelet Branchiostoma lanceolatum. Order Amphioxiformes. Family Pikaiidae †. Genus Pikaia †. Olfactores (unranked)
Contents. hide. Beginning. Classification. Taxonomy. Phylogeny. Origin of chordates. References. Other websites. Chordates, phylum Chordata, are a phylum of animals which have a notochord. The group includes vertebrates, with some closely related invertebrates . Classification. Taxonomy. Phylum Chordata.
Los cordados ( Chordata, del griego χορδωτά khordota ‘con cuerda’) son un filo del reino animal caracterizado por la presencia de una cuerda dorsal o notocorda (o notocordio) de células turgentes, 1 tubo neural hueco en posición dorsal, hendiduras branquiales y cola, por lo menos en alguna fase del desarrollo embrionario. 2 Se conocen casi 6...
The chordates are named for the notochord, which is a flexible, rod-shaped mesodermal structure that is found in the embryonic stage of all chordates and in the adult stage of some chordate species. It is strengthened with glycoproteins similar to cartilage and covered with a collagenous sheath.
