Ecdysozoa genera

Halicryptus is the sole genus of its class of priapulid worms, and has an important effect on the structure of soft-sediment communities.

Titaniloricus is a genus of small marine animal in the phylum Loricifera. It contains a single species, Titaniloricus inexpectatovus, described by Gunnar Gad in 2005. It has been collected from the abyssal plain in Angolan waters of the Atlantic Ocean.

Nanaloricus is a genus of Loriciferan, the first to be described.

Pliciloricus is a genus of marine organisms Pliciloricidae family, the phylum Loricifera described by Higgins & Kristensen, 1986.

Rugiloricus is a genus of marine organisms of the phylum Loricifera and the family Pliciloricidae, described by Higgins & Kristensen in 1986.

Armorloricus is a genus of nanaloricate loriciferans, small to microscopic marine sediment-dwelling animals.

Cateriidae is a family of kinorhynchs placed either in the class Cyclorhagida (according to Sørensen et al.) or Allomalorhagida (according to Herranz et al.). It consists of a single genus, Cateria Gerlach, 1956.

Antygomonas is a genus of cyclorhagids. It is the only genus in the family Antygomonidae Adrianov & Malakhov, 1994. Species of Antygomonas are commonly referred to as "mud dragons."

Fissuroderes is a genus of kinorhynchs in the family Echinoderidae.

Australoricus oculatus is a species of Loricifera, a species of microscopic marine sediment-dwelling animals, in the family Nanaloricidae. It is the only described species in the genus Australoricus. It was discovered in sea caves off New South Wales in Australia.

Meristoderes is a genus of kinorhynchs in the family Echinoderidae.

Spinoloricus is a genus of nanaloricid loriciferans. Its type species is S. turbatio, described in 2007, and another species, native to completely anoxic environment, Spinoloricus cinziae, was described in 2014.