WebPikaia gracilens is an extinct, primitive chordate animal known from the Middle Cambrian Burgess Shale of British Columbia.Described in 1911 by Charles Doolittle Walcott as an annelid, and in 1979 by Harry B. Whittington and Simon Conway Morris as a chordate, it became the "most famous early chordate fossil," or "famously known as the earliest" …

WebA chordate (/ ˈ k ɔːr d eɪ t /) is an animal of the phylum Chordata (/ k ɔːr ˈ d eɪ t ə /).All chordates possess, at some point during their larval or adulthood stages, five synapomorphies, or primary characteristics, that distinguish them from all other taxa.These five synapomorphies include a notochord, dorsal hollow nerve cord, endostyle or thyroid, …

WebAnatomy. The adult larvaceans resemble the tadpole-like larvae of most tunicates. Like a common tunicate larva, the adult Appendicularia have a discrete trunk and tail. ... Furthermore, the Appendicularia retain the ancestral Chordate characteristics of having the clefts, and the anus open directly to the outside, ...

WebA 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.Living representatives are the Myxini (hagfishes), Hyperoartia (including lampreys), and the much more numerous Gnathostomata (jawed vertebrates). Formerly distinct from vertebrates by including …

WebA tadpole is the larval stage in the biological life cycle of an amphibian.Most tadpoles are fully aquatic, though some species of amphibians have tadpoles that are terrestrial.Tadpoles have some fish-like features that may not be found in adult amphibians such as a lateral line, gills and swimming tails.As they undergo metamorphosis, they start to develop functional …

WebApr 07, 2019 · The lamprey is a chordate that belongs to the subphylum vertebrata. It is a jawless fish that lives as a filter-feeder in its many larval years, then transforms into a parasitic adult that has an oral disk filled with teeth that it uses to latch onto other fish. Note, however, that some adults don’t feed but rather live off reserves that they obtained as …

WebOct 26, 2021 · Biology 105: Anatomy & Physiology AP Biology: Exam Prep CSET Foundational-Level General Science (215) Prep

WebAnatomy and morphology See also: Vertebrate anatomy All vertebrates are built along the basic chordate body plan : a stiff rod running through the length of the animal (vertebral column and/or notochord ), [12] with a hollow tube of nervous tissue (the spinal cord ) above it and the gastrointestinal tract below.

WebA tunicate is a marine invertebrate animal, a member of the subphylum Tunicata (/ ˌ tj uː n ɪ ˈ k eɪ t ə /).It is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords (including vertebrates).The subphylum was at one time called Urochordata, and the term urochordates is still sometimes used for these animals. They …

WebPredicted to enable DNA replication origin binding activity. Acts upstream of or within several processes, including chordate embryonic development; cilium assembly; and response to yeast. Predicted to be located in nucleus. Predicted to be part of nuclear origin of replication recognition complex. Is expressed in proliferative region and tail bud.