Cycloneuralia
Encyclopedia
Cycloneuralia is a clade of ecdysozoan animals including the Scalidophora
(Kinorhyncha
ns, Loriciferans, Priapulids) and the Nematoida
(Nematodes, Nematomorphs
). Its sister group is the panarthropoda
.
The name derives from the position of the brain
around the pharynx
.
Scalidophora
Scalidophora is a group of marine pseudocoelomate invertebrates, consisting of the three phyla Kinorhyncha, Priapulida, and Loricifera. The members of the group share a number of characteristics, including introvert larvae and moulting of the cuticle...
(Kinorhyncha
Kinorhyncha
Kinorhyncha is a phylum of small marine pseudocoelomate invertebrates that are widespread in mud or sand at all depths as part of the meiobenthos...
ns, Loriciferans, Priapulids) and the Nematoida
Nematoida
Nematoida is a grouping of animals, including the roundworms and horsehair worms....
(Nematodes, Nematomorphs
Nematomorpha
Nematomorpha is a phylum of parasitic animals that are superficially morphologically similar to nematode worms, hence the name. They range in size in most species from long and can reach in extreme cases up to 2 metres, and in diameter...
). Its sister group is the panarthropoda
Panarthropoda
Panarthropoda is a taxon combining the phyla Arthropoda, Tardigrada, and Onychophora. Dunn et al. in 2008 suggested that the tardigrades could be grouped along with the nematodes, leaving Onychophora as the sister group to the arthropods...
.
The name derives from the position of the brain
Brain
The brain is the center of the nervous system in all vertebrate and most invertebrate animals—only a few primitive invertebrates such as sponges, jellyfish, sea squirts and starfishes do not have one. It is located in the head, usually close to primary sensory apparatus such as vision, hearing,...
around the pharynx
Pharynx
The human pharynx is the part of the throat situated immediately posterior to the mouth and nasal cavity, and anterior to the esophagus and larynx. The human pharynx is conventionally divided into three sections: the nasopharynx , the oropharynx , and the laryngopharynx...
.