Palaeonemertea

Palaeonemertea is a class of primitive nemertean worm. It may be para- or polyphyletic, consisting of three to five clades and totalling about 100 species.

Tubulanus is a genus of primitive nemertean worms in the order Palaeonemertea.

Tubulanidae is a family of primitive nemertean worms in the order Palaeonemertea.

Cephalothrix is a genus of nemerteans belonging to the family Cephalothricidae. The genus has cosmopolitan distribution. Some species, such as Cephalotrix simula, carry a high amount of tetrodotoxin (TTX), a deadly neurotoxin found in pufferfish venom. They hunt molluscs for food and eat small algae and plant matter, they are commonly found on or near oysters or under rocks during low tide. The genus was established in 1843 by Orsted, and has been found in Japan, near the Hiroshima Bay, North America, the United Kingdom, near Cornwall, and the Netherlands. These worms are long, thin and unsegm

species of worm

Carinina is a genus of nemerteans belonging to the family Tubulanidae.

Cephalothricidae is a family of worms belonging to the order Palaeonemertea.

species of worm

Carinomidae is a family of worms belonging to the order Palaeonemertea.

species of worm

Hubrechtiidae is a family of worms belonging to the order Hubrechtiiformes.