What is Entoprocta?
{{Taxobox | name = Entoprocta | image = Barentsa discreta suzukokemusi01.JPG | image_width = 220px | image_caption = ''Barentsia discreta'' | regnum = [[Animal]]ia | superphylum = [[Lophotrochozoa]] | phylum = '''Entoprocta''' | phylum_authority = [[Heinrich Nitsche|Nitsche]], [[1869]] | subdivision_ranks = Families | subdivision = }} [[File:Barentsa discreta suzukokemusi02.jpg|thumb|right|220px|A solitary entoproct]] '''Entoprocta''', or '''Kamptozoa''', is a [[phylum]] of tiny [[sessile]] aquatic [[animal]]s ranging from 0.1 to 7 millimetres (0.004 to 0.28 in) long. Mature individuals are goblet-shaped, on relatively long stalks. They are filter-feeders, with a crown of tentacles whose cilia generate water currents towards the mouth. Both the mouth and anus lie inside the crown. The superficially similar [[Bryozoa]] (Ectoprocta) have the anus outside a 'crown' of hollow tentacles. Most [[family (biology)|families]] of entoprocts are colonial, and all but 2 of the 150 species are [[Ocean|marine]]. A few solitary species can move slowly. Some species eject unfertilized [[ovum|ova]] into the water while others keep their ova in brood chambers until they hatch, and some of these species use [[placenta]]-like organs to nourish the developing eggs. After hatching, the [[larva]]e swim for a short time and then settle on a surface. There they [[Metamorphosis|metamorphose]], and the larval gut generally rotates by up to 180°, so that the mouth and anus face upwards. Both colonial and solitary species also reproduce by [[clone|cloning]]. Some species of [[nudibranch]]s (sea slugs) and [[flatworm]]s prey on entoprocts. A few entoproct species have been found living in close association with other animals. Fossils of entoprocts are very rare and the earliest specimens that have been identified with confidence date from the [[Upper Jurassic]]. Most studies from 1996 onwards have regarded entoprocts as members of the [[Trochozoa]], which also includes [[mollusc]]s and [[annelid]]s. However, a study in 2008 concluded tha