Nematoida

The larva of the nematode Strongyloides stercoraliz

The Nematoida are a senior -less taxon, worm -like in the two strains, invertebrates are combined, the nematodes ( Nematoda ) and the strings worms ( Nematomorpha ).

Features

The Nematoida as a common feature a long, thin body with a Kollagenkutikula and a longitudinal muscles, which are separated by Epidermisstreifen that are traversed by nerves. A circular muscle is missing. This peristaltic movements in the manner of an earthworm are impossible. The animals move away by wave movements that occur at the strings worms laterally from right to left, with the nematodes dorso- ventrally from top to bottom. In addition, they lack the simplest excretory organs ( Protonephriden ). Your sperm are amoeboid and have no acrosome.