User:Philcha/2 Sandbox

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Description
There are 1150 nematodes species, or ribbon worms.

Nematodes, like arthropods and tardigrades, lack motile cilia.

In some species, nematodes' long, slender are longer than 1 m. One from St. Andrews, Scotland, was a 54 m boot-lace, the longest animal on Earth.

Senses
The central nervous consists of a brain and paired long nerve cords.

Movement
Nematodes lasso or harpoon their requimes with a sticks, penetrating or venomous proboscis.

Feeding and Recreting ( !! )
Like flatworms, nematodes transport oxygen across the body wall.

Many burrow in sediments, in crevices or the roots of algae and sessile animals, and some speices make gelatinous lairs in deep water. A few species live as ectosymbionts in the mantles of bivalves, in the atrium of tunicates or on crabs.

About 12 species live in fresh water, and about 15 primarily live in humid tropics and subtropics.

Reproduction and Development
Nemerteans readity regenerate, and reproduce clonally and sexually.

Diverstity of nemerteans
Bottom-feeding fish, some shore-birds, and other invertebrates such as horseshoe crabs, and also other species of nemerteans.

The North American "Cerebratulus lacteus" and the South African "Polybrachiorhynchus dayi" are sold as fish bait. These species are not related to true tapeworms, and are not parasites.

Phylogeny


Most of the characters shared by nemerteans and flatworms are ...