Cephalochordata

(redirected from Cephalochordates)
Also found in: Dictionary, Thesaurus, Encyclopedia.

Cephalochordata

a primitive group of the phylum Chordata that is usually given the status of a class. The group contains only AMPHIOXUS and a few related forms.
References in periodicals archive ?
Our data also provides information on the relative importance of these three groups in comparison with other main macro-invertebrates from the Punta Morales flat collected during the 1984-1987 survey, like cephalochordates (Vargas & Dean, 2010), mollusks (Vargas-Zamora & Sibaja-Cordero, 2011), echinoderms (Vargas & Solano, 2011), crustaceans (Vargas-Zamora, Sibaja-Cordero, & Vargas-Castillo, 2012) and polychaetes (Vargas-Zamora, Sibaja-Cordero, Dean, & Solano-Ulate, 2015).
Taxonomy and distribution of Australian cephalochordates (Chordata: Cephalochordata).
In muddy sediments the cephalochordate remains on the sediment surface.
For the cephalochordates considered here, the exceptionally long separation of the parent taxa--since the latter part of the Mesozoic Era--raises interesting questions about how the divergent gene regulatory networks from the two parents function together and how the hybrid genotype directs the development of the hybrid phenotype.
Ascidians are members of the subphylum urochordates, which is a group of the phylum chordates along with cephalochordates and vertebrates (Satoh, 2003).
At present, the significance of these new findings is obscured by uncertainty about whether characters in the genus Asymmetron are more likely to be primitive or derived within the cephalochordates.
Recent molecular phylogenetic studies have indicaed that cephalochordates diverged first from the chordate stem (Delsuc et al.
Recent sequence-based phylogenies place cephalochordates (amphioxus) as the sister group of all other chordates and Xenoturbella as a new phylum related to hemichordates and echinoderms (Bourlat et al.
In contrast to urochordates, cephalochordates have retained many features of the basal chordate body plan and are likely to approximate the ancestor of both urochordates and vertebrates.