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Urochordata Lankester, 1877 A tunicate is an exclusively marine invertebrate animal, a member of the subphylum Tunicata ( / ˌ tj uː n ɪ ˈ k eɪ t ə / TEW -nih- KAY -tə ). This grouping is part of the Chordata , a phylum which includes all animals with dorsal nerve cords and notochords (including vertebrates ).
References A adhesive organ 1. An organ present at the anterior end of ascidian larvae, serving to attach the larva to the substrate during its metamorphosis. It is usually made of three papillae. 2. The individual papillae. atrium atrial pore atrial siphon Also excurrent siphon or exhalant siphon. Opening through which water exits the branchial basket in ascidians. B blastozooid Sexual ...
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A chordate (/ ˈ k ɔːr d eɪ t / KOR-dayt) is a deuterostomal bilaterian animal belonging to the phylum Chordata (/ k ɔːr ˈ d eɪ t ə / kor-DAY-tə).All chordates possess, at some point during their larval or adult stages, five distinctive physical characteristics (synapomorphies) that distinguish them from other taxa.
The predatory tunicate (Megalodicopia hians), also known as the ghostfish, [2] is a species of tunicate which lives anchored along deep-sea canyon walls and the seafloor.It is unique among other tunicates in that rather than being a filter feeder, it has adapted to life as an ambush predator.
Branchiostoma floridae, the Florida lancelet, is a lancelet of the genus Branchiostoma.The genome of this species has been sequenced, revealing that among the chordates, the morphologically simpler tunicates are actually more closely related to vertebrates than lancelets. [4]
The upper limit on prey size is set by the mouth size, which in the largest genus Bathochordaeus is around 1–2 mm wide for a trunk length of 1–3 cm. [24] In some species, houses are discarded and replaced regularly as the animal grows in size and its filters become clogged; in Oikopleura , a house is kept for no more than four hours before ...