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Larvacea Herdman, 1882 Perennichordata Balfour, 1881 Larvaceans , copelates or appendicularians , class Appendicularia , are solitary, free-swimming tunicates found throughout the world's oceans.
Kowalevskia is a small larvacean. In the adult, the body measures around 1 mm long, while the tail is 8 mm long, appearing stretched and tapered at its ends. [2] [3]Unlike other Appendicularia species, Kowalevskia doesn't have a heart.
Bathochordaeus, the giant larvaceans, is a genus of larvacean tunicates in the family Oikopleuridae.They are free-swimming filter-feeding marine animals that build mucus bubbles.
Spotted gar, Lepisosteus oculatus This article contains a list of all of the classes and orders that are located in the Phylum Chordata.. The subphyla Tunicata and Vertebrata are in the unranked Olfactores clade, while the subphylum Cephalochordata is not.
Oikopleura is a genus of tunicates in the class Appendicularia (larvaceans). It forms a mucus house every four hours at 20 degrees Celsius. This house has a coarse mesh to keep out big particles, and a fine mesh that collects the small particles, down to the nanoplankton that includes (pelagic) bacteria.
A third class, the Larvacea (or Appendicularia), is the only group of tunicates to retain their chordate characteristics in the adult state, a product of extensive neoteny. The 70 species of larvaceans superficially resemble the tadpole larvae of amphibians, although the tail is at right angles to the body.
The genus name Appendicularia was originally coined by Chamisso and Eysenhardt in 1821, naming the first discovered larvacean Appendicularia flagellum.However, the lack of an accurate description made it a nomen nudum, leading to it being reused by Hermann Fol for the species Appendicularia sicula.
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