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Index Cephalochordate

A cephalochordate (from Greek: κεφαλή, "head" and χορδή, "chord") is an animal in the chordate subphylum, Cephalochordata. [1]

24 relations: Branchiostoma, Branchiostoma lanceolatum, Branchiostomidae, British Columbia, Buccal cirri, Burgess Shale, Cambrian Series 3, Cathaymyrus, Chordate, Craniate, Dorsal nerve cord, Endostyle, Ernst Haeckel, Greek language, Lancelet, Notochord, Palaeobranchiostoma, Pharyngeal slit, Pharynx, Pikaia, Subphylum, Synapomorphy and apomorphy, Tunicate, Yunnanozoon.


Branchiostoma is one of the few living genera of lancelets (order Amphioxiformes).

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Branchiostoma lanceolatum

Branchiostoma lanceolatum (European lancelet) is a lancelet in the subphylum Cephalochordata.

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Branchiostomidae (syn: Branchiostomatidae) is the family that includes most of the lancelets, which are tiny chordates without a true spine but only a flexible notochord.

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British Columbia

British Columbia (BC; Colombie-Britannique) is the westernmost province of Canada, located between the Pacific Ocean and the Rocky Mountains.

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Buccal cirri

Buccal cirri are feeding structures found in the oral hood of primitive jawless organisms called amphioxus.

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Burgess Shale

The Burgess Shale is a fossil-bearing deposit exposed in the Canadian Rockies of British Columbia, Canada.

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Cambrian Series 3

Cambrian Series 3 is the still unnamed 3rd Series of the Cambrian.

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Cathaymyrus is a genus of Early Cambrian cephalochordate known from the Chengjiang locality in Yunnan Province, China.

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A chordate is an animal belonging to the phylum Chordata; chordates possess a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail, for at least some period of their life cycle.

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A craniate is a member of the Craniata (sometimes called the Craniota), a proposed clade of chordate animals with a skull of hard bone or cartilage.

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Dorsal nerve cord

The dorsal nerve cord is a unique feature to chordates, and it is mainly found in the Vertebrata chordate subphylum.

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The endostyle is an organ which assists lower-chordates (urochordates and cephalochordates, as well as the larvae of lampreys) in filter-feeding.

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Ernst Haeckel

Ernst Heinrich Philipp August Haeckel (16 February 1834 – 9 August 1919) was a German biologist, naturalist, philosopher, physician, professor, marine biologist, and artist who discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms, and coined many terms in biology, including anthropogeny, ecology, phylum, phylogeny, and Protista. Haeckel promoted and popularised Charles Darwin's work in Germany and developed the influential but no longer widely held recapitulation theory ("ontogeny recapitulates phylogeny") claiming that an individual organism's biological development, or ontogeny, parallels and summarises its species' evolutionary development, or phylogeny.

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Greek language

Greek (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to Greece and other parts of the Eastern Mediterranean and the Black Sea.

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The lancelets — also known as amphioxi (singular, amphioxus) consist of about 32 species of fish-like marine chordates in the order Amphioxiformes.

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In anatomy, the notochord is a flexible rod made out of a material similar to cartilage.

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Palaeobranchiostoma hamatotergum is an extinct cephalochordate from the Early Permian-aged Whitehill Formation in South Africa.

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Pharyngeal slit

Pharyngeal slits are filter-feeding organs found in Invertebrate chordates (lancelets and tunicates) and hemichordates living in aquatic environments.

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The pharynx (plural: pharynges) is the part of the throat that is behind the mouth and nasal cavity and above the esophagus and the larynx, or the tubes going down to the stomach and the lungs.

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Pikaia gracilens is an extinct cephalochordate animal known from the Middle Cambrian Burgess Shale of British Columbia.

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In zoological nomenclature, a subphylum is a taxonomic rank below the rank of phylum.

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Synapomorphy and apomorphy

In phylogenetics, apomorphy and synapomorphy refer to derived characters of a clade – characters or traits that are derived from ancestral characters over evolutionary history.

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A tunicate is a marine invertebrate animal, a member of the subphylum Tunicata, which is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords.

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Yunnanozoon lividum (Yunnan + Greek ζῷον zôion, lividum; "livid animal of Yunnan") is an extinct species from the Lower Cambrian, Chengjiang biota of Yunnan province, China.

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[1] https://en.wikipedia.org/wiki/Cephalochordate

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