In November 2017, we searched the literature systematically lo determine the frequency of leucism among classes of
chordates. We first searched Web of Science for the terms leucistic, leucism., and partial albinism.
Ferrier et al., "The amphioxus genome and the evolution of the
chordate karyotype," Nature, vol.
(17) At some point between the origin of
chordates and that of jawed vertebrates, an entire genome was duplicated at two different times.
Ciona intestinalis is a basal
chordate and a close relative of vertebrates, (7,8) and the Ciona larva exhibits a typical
chordate body plan.
They found that the cells form a muscle that runs along the animal's midline, precisely where the notochord would be if the worm were a
chordate. The researchers named this muscle the axochord, as it runs along the animal's axis.
What does the term
chordate mean when applied to animal species?
Adams, "Phylogenetic analysis of the tenascin gene family: evidence of origin early in the
chordate lineage," BMC Evolutionary Biology, vol.
After positioning of the cursor through interventricular septum and posterior wall, at the level of
chordate tendinae, simultaneous M-mode and two dimensional recording were obtained from the parasternal transducer position in both long and short axis views of the left ventricle.
Hemichordates also share many of the same characteristics as
chordates - a group of animals that includes humans - with the name hemichordate roughly translating to 'half a
chordate.'
It is a member of the
chordate family, a group that today includes fish, amphibians, birds, reptiles and mammals.