- nouncephalochordate (noun) · cephalochordates (plural noun)
- a marine invertebrate of the subphylum Cephalochordata; a lancelet:"the great similarities between cephalochordates and vertebrates"
adjectivecephalochordate (adjective)- relating to or denoting cephalochordates:"cephalochordate genes"
Cephalochordate | Natural History, Features & Evolution
- The lancelets are also called cephalochordates (Greek: kephale, “head”) because the notochord extends from near the tip of the tail to well into the anterior of the body. …
- The bodies of lancelets, like those of fishes and other vertebrates, are largely made up of serially repeated units (segments) that include blocks of muscle… See more
cephalochordate, any of more than two dozen species belonging to the subphylum Cephalochordata of the phylum Chordata. Small, fishlike marine invertebrates, they … See more
- Lancelet sexes are separate, and asexual reproduction does not occur. Eggs and s…
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Adult lancelets reach a length of about six to seven centimetres (2.5 inches). There is little structural diversity within the group, the main difference … See more
Although edible, lancelets are never sufficiently abundant to constitute a significant source of food to humans or an important part of the food chain in nature. Rather, their significance has to do with their place in evolution, as invertebrates transitional to … See more
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Lancelet - Wikipedia
The larvae are extremely asymmetrical, with the mouth and anus on the left side, and the gill slits on the right side. Organs associated with the pharynx are positioned either exclusively on the left or on the right side of the body. In addition also segmented muscle blocks and parts of the nervous system are asymmetrical. After metamorphosis the anatomy becomes more symmetrical, …
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Cephalochordata: Definition, Characteristics, Classification
WEBNovember 28, 2023. Cephalochordata (Gr., kephale, head; chorde, cord) is a sub-phylum within the phylum Chordata. The animals in this group are small, marine invertebrates. …
Lancetvisjes - Wikipedia
De lancetvisjes of schedellozen (Cephalochordata) vormen een onderstam van de chordadieren (Chordata). Het omvat de gelijknamige familie van de lancetvisjes (Branchiostomatidae) met dertig soorten, verdeeld over drie families met elk een geslacht. Verder zijn er een aantal uitgestorven fossiele soorten bekend, waaronder de Pikaia.
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Introduction to the Cephalochordata - University of …
WEBWith about twenty-five species inhabiting shallow tropical and temperate oceans, the Cephalochordata are a very small branch of the animal kingdom. Known as lancelets or as amphioxus (from the Greek for "both …
Cephalochordata | Encyclopedia.com
WEBMay 14, 2018 · Cephalochordata (Acrania; phylum Chordata) A subphylum that contains only Branchiostoma lanceolata (amphioxus, or lancelet), probably the most primitive of …
Chordate evolution and the three-phylum system - PMC
WEBNov 7, 2014 · Chordates consist of three distinct animal groups: cephalochordates, urochordates (tunicates) and vertebrates. This review starts with a brief description of …
Cephalochordata - an overview | ScienceDirect Topics
WEBCephalochordata is defined as the most recent common ancestor of lancelets and Craniata, and all of that ancestor's descendants. Cephalochordates are diagnosed by …
Chordate evolution and the three-phylum system
WEBChordates consist of three distinct animal groups: cephalochordates, urochordates (tunicates) and vertebrates. This review starts with a brief description of how the Phylum Chordata and its three subphyla were …
