Parazoa (Parazoa, gr. Παρα-, para, "next to", and ζωα, zoa, "animals") are a taxon with sub-kingdom category that is located at the base of the phylogenetic tree of the animal kingdom in opposition to the sub-kingdom Eumetazoa; they group together the most primitive forms, characterized by not having proper tissues or that, in any case, these tissues are only partially differentiated. They generally group a single phylum, Porifera, which lack muscles, nerves and internal organs, which in many cases resembles a cell colony rather than a multicellular organism itself. All other animals are eumetazoans, which do have differentiated tissues.
On occasion, Parazoa reunites Porifera with Archaeocyatha, a group of extinct sponges sometimes considered a separate phylum. In other cases, Placozoa is included, depending on the authors.
Parazoa (Parazoa, gr. Παρα-, para, "next to", and ζωα, zoa, "animals") are a taxon with sub-kingdom category that is located at the base of the phylogenetic...
needed] For a long time thereafter, sponges were assigned to subkingdom Parazoa ("beside the animals") separated from the Eumetazoa which formed the rest...
simple animals. It is one of the three animal subkingdoms, along with Parazoa and Eumetazoa. It is nearly synonymous with Mesozoa. Agnotozoa was first...
ParaHoxozoa (or Parahoxozoa) is a clade of animals that consists of Bilateria, Placozoa, and Cnidaria. The relationship of this clade relative to the two...
a long time thereafter sponges were assigned to a separate subkingdom, Parazoa (meaning beside the animals). They are now classified as a paraphyletic...
Placozoa (/plækəˈzoʊə/ PLAK-ə-ZOH-ə, "flat animals") is a phylum of marine and free-living (non-parasitic) animals. They are simple blob-like animals without...
a long time thereafter sponges were assigned to a separate subkingdom, Parazoa (meaning beside the animals). They are now classified as a paraphyletic...
The taxonomy of commonly fossilized invertebrates combines both traditional and modern paleozoological terminology. This article compiles various invertebrate...
Hoilungia is a genus that contains one of the simplest animals and belongs to the phylum Placozoa. Described in 2018, it has only one named species, H...
similar orthologs (approximately 35% sequence identity) were identified in Parazoa (i.e., A. queenslandica) and in Fungi, specifically Ascomycetes (i.e.,...
source of a single ancestral Kindlin protein is the earliest metazoa, the Parazoa. Within vertebrates, these ancestral proteins were subjected to duplication...
organism falls in a sister group to the eumetazoa (i.e. all animals except Parazoa). The integument of the dorsal side were unsegmented and covered with small...
Polyplacotoma mediterranea is a species in the phylum Placozoa, only representative of the genus Polyplacotoma. They differ greatly from other species...
Uniplacotomia is a class of placozoans encompassing the vast majority of the phylum, with the exception of Polyplacotoma. It was established in 2022. It...
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