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Phylum of animals having a dorsal nerve cord
A chordate (/ˈkɔːrdeɪt/ KOR-dayt) is a bilaterian animal belonging to the phylum Chordata (/kɔːrˈdeɪtə/ kor-DAY-tə). All chordates possess, at some point
Chordate
Extinct group of animals that lived between 485 and 538 million years ago
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
Cambrian_chordates
Marine animals, subphylum of chordates
their close relationship to the vertebrates is certain. Both groups are chordates, as evidenced by the fact that during their mobile larval stage, tunicates
Tunicate
Superphylum of bilateral animals
hollow nerve cord of chordates. Both the hemichordates and the chordates have a thickening of the aorta, homologous to the chordate heart, which contracts
Deuterostome
extinct classes shown are Placodermi and Acanthodii. Many other extinct chordate groups are not shown here. Order Amphioxiformes Order Enterogona Order
List_of_chordate_orders
Extinct genus of primitive chordates
Morris as a chordate, it became "the most famous early chordate fossil", or "famously known as the earliest described Cambrian chordate". It is estimated
Pikaia
Animals without a vertebral column
notochord. It is a paraphyletic grouping including all animals excluding the chordate subphylum Vertebrata, i.e. vertebrates. Nonetheless, almost all invertebrates
Invertebrate
Study of the evolution of the chordate clade
Chordate genomics is the study of the evolution of the chordate clade based on a comparison of the genomes of several species within the clade. The field
Chordate_genomics
Subphylum of chordates
these characteristics with other chordates. Vertebrates are distinguished from all other animals, including other chordates, by multiple synapomorphies, namely:
Vertebrate
Subphylum of chordates
filter-feeding chordates in the subphylum Cephalochordata, class Leptocardii, and family Branchiostomatidae. Lancelets diverged from other chordates during or
Lancelet
Extinct Cambrian group of animals
vetulicolians may be paraphyletic and form a basal evolutionary grade of stem chordates. The taxon name, Vetulicolia, is derived from the type genus, Vetulicola
Vetulicolia
anatomy is a potential result of speciation and habitat variation. The five chordate synapomorphies are present in chondrichthyes as follows. The five synapomorphies
Shark_anatomy
Flexible, hollow tube found in hemichordates
feature of chordates. However, they are now recognized to not share histological composition to that of the notochord found in chordates, lacking the
Stomochord
Class of marine invertebrates
symmetry; The latter indicates that they belong to the Bilateria, along with chordates, arthropods, annelids and molluscs. Sea urchins are found in every ocean
Sea_urchin
Flexible rod-shaped structure in all chordates
The notochord is an elastic, rod-like structure found in chordates. In vertebrates the notochord is an embryonic structure that disintegrates, as the
Notochord
Internal support structure of an animal
derived from mesodermal tissue. In three phyla of animals, Chordata (chordates), Echinodermata (echinoderms) and Porifera (sponges), endoskeletons of
Endoskeleton
Paraphyletic class of tunicates comprising sea squirts
approximation of ancestral chordates, they can provide insight into the link between chordates and ancestral non-chordate deuterostomes, as well as the
Ascidiacea
Extinct genus of Cambrian organisms
Cambrian chordate, and its fossils were found in the Cambrian-age Parker Slate of Vermont in the late 19th century. Emmonsaspis is a chordate related to
Emmonsaspis
Class of jawless fish
their development are considered to be chordates. Lampreys contain these characteristics that define them as chordates. Lamprey anatomy is very different
Lamprey
Cambrian fossil genus of chordate
Metaspriggina is a genus of chordate initially known from two specimens in the Middle Cambrian Burgess Shale and 44 specimens found in 2012 at the Marble
Metaspriggina
Phylum of marine deuterostome animals
comparison with chordates, so many of the genetic markers identified in this group are also found in chordates or are homologous to chordates in some way
Hemichordate
Repeated openings that appear along the pharynx of chordates
of invertebrate chordates.[citation needed] Pharyngeal arches, pouches, and clefts are, at some stage of life, found in all chordates. One theory of their
Pharyngeal_slit
Clade of animals comprising vertebrates and tunicates
Cephalochordata (with only 32 known species across 3 genera) are the only chordates not included in the clade. This clade is defined by a more advanced olfactory
Olfactores
Cambrian fossil chordate
with various studies suggesting placements as a cephalochordate, a stem-chordate, a hemichordate, a stem-vertebrate, a stem-deuterostome, an ambulacrarian
Yunnanozoon
Chordate neural structure
The dorsal nerve cord is an anatomical feature found in all chordates, mainly in the subphyla Vertebrata and Cephalochordata, as well as in some hemichordates
Dorsal_nerve_cord
Biological kingdom
nematodes; and the deuterostomes, which include echinoderms, hemichordates and chordates, the last of which contains the vertebrates. The much smaller basal phylum
Animal
Organ found in some chordates
The endostyle is an organ found in invertebrate chordate species of tunicates and lancelets, and in the larval stage of vertebrate lampreys. It assists
Endostyle
Extinct genus of crustaceans
Patrick Burn Formation, near Lesmahagow. Originally described as an early chordate, recent studies suggest that it was in fact an arthropod, more precisely
Ainiktozoon
Extinct group of marine invertebrates
debates over the origin of chordates, as under the calcichordate hypothesis they were interpreted as being stem-group chordates. However, multiple lines
Stylophora
Blocks of skeletal muscle tissue in aquatic chordates
skeletal muscle tissue arranged in sequence, commonly found in aquatic chordates. Myomeres are separated from adjacent myomeres by fascia consisting of
Myomere
lineage of chordate (Cephalochordates, Urochordates, Craniates) evolved from its own lineage of mitrate, and thus the echinoderms and the chordates are sister
Calcichordate_hypothesis
2004 book on evolution by Richard Dawkins & Yan Wong
775 mya Lancelets (Amphioxiformes) Lancelets are a textbook example of a chordate. Equipped with a notochord, a nerve tube on the dorsal side and gill slits
The_Ancestor's_Tale
Species of ascidian
Ciona intestinalis has been used as a model species of an invertebrate chordate in developmental biology and genomics. Although Linnaeus first categorised
Ciona_intestinalis
Geological formation in Utah, United States
Chordates reported from the Marjum Formation Genus Species Presence Material Notes Images Megasiphon M. thylakos House Range. One specimen (UMNH.IP.6079)
Marjum_Formation
Extinct genus of chordates
Cathaymyrus is a genus of Early Cambrian chordate known from the Chengjiang biota in Yunnan Province, China. Both species have a long segmented body with
Cathaymyrus
conserfariam) Socorro isopod (Thermosphaeroma thermophilum) There are 23 chordate species assessed as extinct in the wild. Wyoming toad (Anaxyrus baxteri)
List of animals that are extinct in the wild
List_of_animals_that_are_extinct_in_the_wild
Hypothesis in developmental biology
Whereas this arrangement is retained in arthropods and other protostomes, in chordate deuterostomes, the nerve cord is located dorsally and the heart ventrally
Inversion (evolutionary biology)
Inversion_(evolutionary_biology)
Topics referred to by the same term
Cordate (leaf shape), in plants Cordate axe, a prehistoric stone tool Chordate, a member of a major phylum of animals Cordata (disambiguation) This disambiguation
Cordate
Genus of early vertebrates
elongated cephalic region, which helps differentiate it from other Cambrian chordates. This region differentiates from the rest of the body due to the lack
Nuucichthys
Extinct agnathan chordates resembling eels
more than a century. It has been hypothesized that the first mechanism of chordate tissue mineralization began either in the oral skeleton of conodonts or
Conodont
Evolutionary trend
the arthropods, the molluscs in the shape of the cephalopods, and the chordates, were distinctive in having "complex active bodies", something that the
Cephalization
Gas exchange across the skin of an organism
Cutaneous respiration, or cutaneous gas exchange (sometimes called skin breathing), is a form of respiration in which gas exchange occurs across the skin
Cutaneous_respiration
Class of hemichordate invertebrates
diverticulum was once thought to be homologous with the notochord of chordates, hence the name "hemichordate" for the phylum. The mouth opens posteriorly
Acorn_worm
American scientist
where she worked from 2012 to 2019. Her lab investigates the evolution of chordates by comparative genetic and phylogenetic analysis of animal taxa. Billie
Billie_J._Swalla
Extinct genus of jawless fishes
(July 2024). "A new interpretation of Pikaia reveals the origins of the chordate body plan". Current Biology. 34 (13): 2980–2989.e2. Bibcode:2024CBio..
Haikouichthys
Feature of chordate cardiac anatomy
pouch formed from the upper and left angle of the right ventricle in the chordate heart, from which the pulmonary trunk arises. It develops from the bulbus
Infundibulum_(heart)
An IUCN Red List critically endangered (CR or sometimes CE) species is one that has been categorized by the International Union for Conservation of Nature
List of critically endangered species in the United States
List_of_critically_endangered_species_in_the_United_States
Genus of moths
Clade: Pancrustacea Class: Insecta Order: Lepidoptera Family: Choreutidae Genus: Saptha Walker, 1864 Synonyms Badera Walker, 1866 Chordates Snellen, 1877
Saptha
Topics referred to by the same term
native to the Sonoran Desert Region Cordatum, a species of sea urchin Chordate, a phylum of animals having a dorsal nerve cord All pages with titles containing
Cordata
Extinct genus of chordates
Zhongxiniscus is a genus of primitive chordate from eastern Yunnan that lived during the Early Cambrian. Known from a single specimen, it had a small,
Zhongxiniscus
Process of embryonic development in mammals
is also a difference from lower chordates. The difference between a mammalian embryo and an embryo of a lower chordate animal is evident starting from
Mammalian_embryogenesis
Fish anatomical structure
cartilage. The palatoquadrate forms from splanchnocranium in various chordates including placoderms and acanthodians. Look up palatoquadrate in Wiktionary
Palatoquadrate
Cambrian age animal
position of Xidazoon among the chordates was not certain. A recent phylogenetic analysis of vetulicolians and other early chordates did not including Pipiscius
Pomatrum
Excretory organ similar to vertebrate kidney
function similar to the vertebrate kidneys (which originated from the chordate nephridia). Nephridia remove metabolic wastes from an animal's body and
Nephridium
Clade of deuterostomes containing echinoderms and hemichordates
deuterostome did not possess a post-anal tail, which evolved convergently in chordates and hemichordates, and possessed gill slits but not additional structures
Ambulacraria
Series of Early Cambrian deposits in the Chiungchussu Formation in China
best window into the Cambrian 'explosion'", especially on the origin of chordates. Although fossils from the region have been known from the early part
Maotianshan_Shales
Extinct genus of soft-bodied sea animals
identified the organic material as representing the decay products of chordate tissues as opposed to the polysaccharide-based chitin (as is seen in arthropods)
Tullimonstrum
Geological formation in Scotland
Chordates Species Notes Images Loganellia scotica A loganelliid thelodont. Birkenia elegans An birkeniid anaspid.
Kip_Burn_Formation
Extinct genus of Cambrian Era Chordate
length inside the tail was a notochord, thereby demonstrating the animal's chordate affinities as being related to tunicates. The forebody, and overall form
Nesonektris
List of animals
Phylum Entoprocta Phylum Mollusca Phylum Nemertea Phylum Phoronida List of chordate orders List of fish families List of fish common names List of amphibians
Lists_of_animals
English paleontologist (died 2020)
paleontologist famous for developing the Calcichordate Theory of the origin of chordates, now widely discredited. Jefferies joined the British Museum in 1960,
Dick_Jefferies
This is an incomplete list of organisms that are true parasites upon other organisms. (endo = within; parasites that live inside their hosts) Rafflesia
List_of_parasitic_organisms
Profound change in body structure during the postembryonic development of an organism
in hemimetabolous insects. In chordates, metamorphosis is iodothyronine-induced and an ancestral feature of all chordates. All three categories of metamorphosis
Metamorphosis
Species of flowering plant
shape of the leaf blades of the V. phoeniceum can be elliptical, ovate, chordate or lanceolate depending on the environment in which it grows in.[citation
Verbascum_phoeniceum
Phylum of invertebrate animals
animal species—far behind the arthropods' 1,113,000 but well ahead of chordates' 52,000. About 200,000 living species in total are estimated, and 70,000
Mollusca
Class of marine animals in the subphylum Tunicata
accumulation of undigested material. Appendicularia retains the ancestral chordate characteristics of having the pharyngeal spiracles and the anus open directly
Larvacean
Geological formation in Scotland
Chordates Species Notes Images Loganellia scotica A loganelliid thelodont. Jamoytius kerwoodi An enigmatic chordate.
Patrick_Burn_Formation
British marine and evolutionary biologist (1868–1949)
noted for his hypothesis on chordate evolution, known as Garstang's theory, which suggests an alternative route for chordate evolution from echinoderms
Walter_Garstang
Extinct family of jawless fishes
Ellisoniidae is an extinct family of conodonts, a kind of primitive chordate. Genera are: †Ellisonia †Foliella †Hadrodontina †Parapachycladina †Parafurnishius
Ellisoniidae
Extinct family of animals
analysis of the taxon was done as an extension of work focused on stem-chordates. Thylacocercus may be more derived than Vetulocystis and Dianchicystis
Vetulocystidae
Species of vetulicolian invertebrate
Nesonektris and Vetulicola. The recent consensus places vetulicolians as stem-chordates, but their exact position remains unclear. Depending on that position
Shenzianyuloma
Paraphyletic infraphylum of fish
Forey, Peter L.; Aldridge, Richard J. (May 2000). "Conodont affinity and chordate phylogeny". Biological Reviews of the Cambridge Philosophical Society.
Agnatha
Marine phylum of animals often with radial symmetries
species, making it the second-largest group of deuterostomes after the chordates, as well as the largest marine-only phylum. The first definitive echinoderms
Echinoderm
Developmental precursor to the central nervous system
In the developing chordate (including vertebrates), the neural tube is the embryonic precursor to the central nervous system, which is made up of the brain
Neural_tube
Extinct Cambrian group of marine animals
Centroneuralia hypothesis, which features a paraphyletic Deuterostomia with chordates as the sister-group to protostomes. If proven true, pharyngeal slits would
Banffozoa
First geological period of the Paleozoic Era
radiodont that bore a large horseshoe-shaped carapace. Pikaia was a stem-chordate from the Middle Cambrian Amiskwia sagittiformis was a large bodied gnathiferan
Cambrian
Cephalic part of an animal
hypopharynx which is usually located between the maxillac. Though invertebrate chordates – such as the tunicate larvae or the lancelets – have heads, there has
Head
Origin and diversification of fish through geologic time
during the Cambrian explosion. It was during this time that the early chordates developed the skull and the vertebral column, leading to the first craniates
Evolution_of_fish
distribution, ecology, and conservation". Zoosystema. 37 (2): 381–402. doi:10.5252/z2015n2a7. List of chordate orders List of regional reptiles lists
List_of_reptiles_of_Togo
Single animal that is part of a colonial animal
Cnidaria colloquially referred to as "jellyfish" Pyrosome for colonial chordates in Tunicata Thorp, James H.; Wood, Timothy S. (2019). "Chapter 13 - Phylum
Zooid
(subphylum Tunicata) are a group of filter-feeding marine invertebrates. As chordates, they have been proposed to be the closest relatives of vertebrates. Tunicates
Glossary_of_tunicate_anatomy
Species of rodent
Extant species of subfamily Murinae (Rattus) Kingdom: Animalia Phylum: Chordate Class: Mammalia Superorder: Euarchontoglires Order: Rodentia Family: Muridae
Karoko_hill_rat
Sheet of internal skeletal muscle
from the stomach can be traced widely among the chordates. Thus the model organism, the marine chordate lancelet, possesses an atriopore by which water
Thoracic_diaphragm
Species of rodent
Extant species of subfamily Murinae (Otomys) Kingdom: Animalia Phylum: Chordate Class: Mammalia Superorder: Euarchontoglires Order: Rodentia Family: Muridae
Charada_vlei_rat
Species of amphibian
Proteus of the family Proteidae and the only exclusively cave-dwelling chordate species found in Europe; the family's other extant genus is Necturus. In
Olm
Extinct Cambrian family of animals
found the Banffiidae to form the earliest part of the paraphyletic stem-chordate evolutionary grade, as shown in this simplified cladogram: An earlier study
Banffiidae
Essential nutrient
providing a regulatory feedback mechanism. In vertebrates and invertebrate chordates, RA has a pivotal role during development. Altering levels of endogenous
Vitamin_A
Cavity in the hearts of chordates
quadrangular cavity which precedes the atrium on the venous side of the chordate heart.[verification needed] In mammals, the sinus venosus exists distinctly
Sinus_venosus
Part of the body that forms the supporting structure
endoskeleton is derived from mesodermal tissue. Endoskeletons occur in chordates, echinoderms, and sponges. Pliant skeletons are capable of movement; thus
Skeleton
Extinct genus of Cambrian organisms
corresponding to the class Banffozoa, in the evolutionary grade leading to extant chordates. An earlier study in 2014 placed vetulicolians as the sister-group to
Heteromorphus
Paleopolyploidy in early vertebrates
estimated that 1R happened less than 10 million years since the divergence of chordate common ancestor, and that 2RG happened about 10 million years after the
2R_hypothesis
Period of major evolutionary diversification of animal life
present-day animal phyla appeared during this period, including the earliest chordates. The seemingly rapid appearance of fossils in the "Primordial Strata"
Cambrian_explosion
Part of the autonomic nervous system that stimulates fight-or-flight responses
ISBN 978-0-495-39184-5. Nicol, J. A. Colin (1952). "Autonomic Nervous Systems in Lower Chordates". Biological Reviews. 27 (1): 1–48. doi:10.1111/j.1469-185X.1952.tb01361
Sympathetic_nervous_system
Part of the throat that is behind the mouth and nasal cavity
characteristic features of vertebrates whose origin can be traced back through chordates to basal deuterostomes who also share endodermal outpocketings of the
Pharynx
Clade of reptile-like animals
1038/s41586-025-08884-5. ISSN 1476-4687. PMC 12119326. Rowe, T. (2004). "Chordate phylogeny and development". Assembling the Tree of Life. J. Cracraft and
Reptiliomorpha
Bony "loops" present in fish, which support the gills
throat (pharyngeal cavity) of fish, which support the fish gills. As chordates, all vertebrate embryos develop pharyngeal arches, though the eventual
Branchial_arch
Genus of tunicates
Oikopleura dioica, which is an anomaly among chordates. It has retained the fundamental body plan of the chordate; yet, it has lost the mechanism for retinoic
Oikopleura
Canadian neurobiologist
invertebrate species, especially the Drosophila visual system and the diminutive chordate nervous system of the ascidian tadpole larva. His most cited publications
Ian_Meinertzhagen
Rock assemblage in Paris Canyon, Idaho, U.S.
(3) brachiopods (4) mollusks, (5) arthropods, (6) echinoderms and (7) chordates (vertebrates). The assemblage also contains fossil algae and coprolites
Paris_biota
First portion of the alimentary canal that receives food
oral teeth. Most bilaterian phyla, including arthropods, molluscs and chordates, have a two-opening gut tube with a mouth at one end and an anus at the
Mouth
CHORDATE
CHORDATE
CHORDATE
CHORDATE
Boy/Male
Australian, German, Polish
To Dispel Anger; To Get Rid of Anger; Dispels Anger
Girl/Female
Tamil
Vanajakshi | வாநாஜாகà¯à®·à¯€
Forest queen
Boy/Male
Arabic, Indian, Muslim, Sindhi
Follower
Boy/Male
Arabic, Muslim
Gift; Talent; Plural of Mauhiba
Female
Dutch
, Elisabeth Charlotte.
Girl/Female
Hindu, Indian, Traditional
Snow; Dew
Boy/Male
Tamil
Dawn, Sunrise, Morning glory, First Ray of light, One who is of the nature of time itself
Girl/Female
Aramaic American Hebrew
Listener.
Boy/Male
Australian, Danish, German, Swedish
God is Perfection; Baal's Pledge; Bal was an Ancient God of the Semites
Boy/Male
Russian
Beyond expectation.
CHORDATE
CHORDATE
CHORDATE
CHORDATE
CHORDATE