Cycloneuralia

The larva of the nematode Strongyloides stercoraliz

The Cycloneuralia are a senior -less taxon in which five tribes wormlike, invertebrates are combined, the nematodes ( Nematoda ) and the strings worms ( Nematomorpha ) and Priapswürmer ( Priapulida ), Corset animals ( Loricifera ) and Hakenrüssler ( Kinorhyncha ).

Features

The Cycloneuralia have as a common feature a characteristic structure of the brain, which annularly surrounds the pharynx or other areas of the anterior digestive tract. It shows a typical structure of the somata of brain cells, front and rear, and a central annulus ( Neuropili ). From the belly side ( ventral ) area of ​​the brain ring are shown a single or a paired nerve cord.

System

• Cycloneuralia Nematoida Nematodes ( Nematoda )
• Hairworm ( Nematomorpha )

• Priapswürmer ( Priapulida )
• Corset animals ( Loricifera )
• Hakenrüssler ( Kinorhyncha )