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The Platyhelminthes have very few synapomorphies - distinguishing features that all Platyhelminthes (but no other animals) exhibit. This makes it difficult to work out their relationships with other groups of animals, as well as the relationships between different groups that are described as members of the Platyhelminthes.
The "Platyzoa" / ˌ p l æ t ɪ ˈ z oʊ. ə / are a group of protostome unsegmented animals proposed by Thomas Cavalier-Smith in 1998.Cavalier-Smith included in Platyzoa the phylum Platyhelminthes (or flatworms), and a new phylum, the Acanthognatha, into which he gathered several previously described phyla of microscopic animals.
The presence of spiral cleavage in animals such as platyhelminths could be difficult to correlate with some phylogenies. [ 7 ] Evidence of a close relationship between molluscs , annelids and lophophorates was found in 1995 and Lophotrochozoa was defined as the group containing these taxa and all the descendants of their last common ancestor. [ 8 ]
Digenea (Gr. Dis – double, Genos – race) is a class of trematodes in the Platyhelminthes phylum, consisting of parasitic flatworms (known as flukes) with a syncytial tegument and, usually, two suckers, one ventral and one oral.
The platypus has frequently appeared in Australian postage stamps, most recently the 2015 "Native Animals" series and the 2016 "Australian Animals Monotremes" series. [ 138 ] [ 139 ] In the American animated series Phineas and Ferb , the title characters own a pet bluish-green platypus named Perry who, unknown to them, is a secret agent.
Pages in category "Platyhelminthes" The following 110 pages are in this category, out of 110 total. This list may not reflect recent changes. ...
Run these facts through your profile machine and you’re probably not going to get “cactus” back as the answer. Native to tropical rainforests along the Atlantic Coast of Brazil — both ...
They are distinguished from other related animals by the presence of a folded pharynx, an elongated intestine with numerous complex diverticula, and multiple ocelli. [ 2 ] The etymology of the order name Polycladida corresponds to the two ancient Greek words πολύς ( polús ), meaning "numerous", and κλάδος ( kládos ), meaning "branch".