Chordate - Wikipedia
WebA chordate (/ ˈ k ɔːr d eɪ t / KOR-dayt) is a deuterostomic animal belonging to the phylum Chordata (/ k ɔːr ˈ d eɪ t ə / 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 .
Chordate | Definition, Characteristics, & Facts | Britannica
WebMar 29, 2024 · Chordate, any member of the phylum Chordata, which includes the vertebrates, the most highly evolved animals, as well as two other subphyla—the tunicates and cephalochordates. Some classifications also …
Chordate - Simple English Wikipedia, the free encyclopedia
WebChordates, phylum Chordata, are a phylum of animals which have a notochord. The group includes vertebrates, with some closely related invertebrates.
Chordate - Evolution, Paleontology, Anatomy | Britannica
WebEvolution and paleontology. Many scientists maintain that chordates originated sometime earlier than 590 million years ago; that is, they predate the fossil record. Such early representatives were soft-bodied and therefore left a poor fossil record. The oldest known fossil chordate is Pikaia gracilens, a primitive cephalochordate dated to ...
List of chordate orders - Wikipedia
WebThis 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)
5.9.2: Chordates - Biology LibreTexts
WebCharacteristics of Chordata. Animals in the phylum Chordata share five key characteristics that appear at some stage during their development: a notochord, a dorsal hollow (tubular) nerve cord, pharyngeal gill arches or slits, a post-anal tail, and an endostyle/thyroid gland (Figure 29.3). In some groups, some of these key characteristics are ...
28.5C: Phylum Chordata - Biology LibreTexts
WebOct 31, 2023 · The phylum Chordata contains all of the animals that have a rod-like structure used to give them support. In most cases this is the spine or backbone. Within Chordata there are five classes of animals: fish, amphibians, reptiles, birds, and mammals. Three dividing factors separate these classes:
Cambrian chordates - Wikipedia
WebThe 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.
Introduction to the Chordata - University of California Museum of ...
WebThe Chordata is the animal phylum with which everyone is most intimately familiar, since it includes humans and other vertebrates . However, not all chordates are vertebrates. All chordates have the following features at some point in their life (in the case of humans and many other vertebrates, these features may only be present in the embryo ...
29.1: Chordates - Biology LibreTexts
WebThe characteristic features of Chordata are a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail. Chordata contains two clades of invertebrates: Urochordata (tunicates) and Cephalochordata (lancelets), together with the vertebrates in Vertebrata. Most tunicates live on the ocean floor and are suspension feeders.
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