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Symbiotic Invertebrates

This is a list of all those groups that contain species that are directly reliant on another animal for their survival. In most cases these species are parasitic on other invertebrates or vertebrates.

Italics = groups that are non-native, but established in the UK.
Bold = Phylum (and subphylum)
Normal font = Class
Indented font = Order
Double indent = Sub order

Protozoa

Platyhelminthes (flatworms)
Monogenea (flukes)
Trematoda (flukes)
Cestoda (tapeworms)

Mesozoa
Rhombozoa (rhombozoans)
Orthonecta (orthonectidans)

Gastrotricha (gastrotrichans)

Nematoda (round-worms)

Cephalorhyncha
Nematomorpha (horsehair worms)

Rotifera (wheel animalcules)
Bdelloidea
Seisonidea

Cycliophora

Annelida (segmented worms)
Clitellata (leeches)

Arthropoda
Crustacea
Copepoda (copepods)
Chelicerata
Arachnida
Parasitiformes (ticks)
Insecta
Mallophaga (biting lice)
Anoplura (sucking lice)
Strepsiptera (stylopids)
Hymenoptera
Parasitica (parasitic wasps)
Diptera (true flies)
Nematocera (mosquitoes, etc.)
Brachycera (ked flies, tachinid flies, etc.)
Siphonaptera (fleas)

Pentastoma (tongue-worms)

Italics = introduced taxa only

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