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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 ...
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.
Origin of chordates. According to a long-standing theory, the origin of chordates may be found in transformed larvae of sea-squirts ( tunicates ). Adult tunicates are sessile, but their larvae are motile, and have some features found in early vertebrates.
Chordate is a phylum of animals that includes vertebrates, tunicates, and cephalochordates. Learn about their general features, life cycle, ecology, and evolution from Britannica.
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.
Vertebrates are members of the kingdom Animalia and the phylum Chordata (Figure 29.1.1 29.1. 1 ). Recall that animals that possess bilateral symmetry can be divided into two groups—protostomes and deuterostomes—based on their patterns of embryonic development.
This article contains a list of all of the classes and orders that are located in the Phylum Chordata .
