Parasitic protostomes

Nematomorpha (sometimes called Gordiacea, and commonly known as horsehair worms, hairsnakes, or Gordian worms) are a phylum of parasitoid animals similar to yet distinct from nematode worms in morphology, hence the name. Most species range in size from , reaching in extreme cases, and in diameter. Horsehair worms can be discovered in damp areas, such as watering troughs, swimming pools, streams, puddles, and cisterns. The adult worms are free-living, but the larvae are parasitic on arthropods, such as beetles, cockroaches, mantises, orthopterans, and crustaceans. About 351 freshwater species a

macroscopic, parasitic worm

The Myzostomida or Myzostomatida are an order of small marine worms, which are parasitic on echinoderms, mostly crinoids. These highly unusual and diverse annelids were first discovered by Friedrich Sigismund Leuckart in 1827.

Rhynchobdellida (from the Greek rhynchos, mouth, and bdellein, sucking), the jawless leeches or freshwater leeches, are an order of aquatic leeches. Despite the common name "freshwater leeches", species are found in both sea and fresh water. They are defined by the presence of a protrusible proboscis instead of jaws, and having colourless blood. They move by "inchworming" and are found worldwide. The order contains 110 species, divided into 41 genera and three families. Members of the order range widely in length, usually between 7 and 40 mm. They are hermaphrodite. The order is not monop

Dicyemida, also known as Rhombozoa, is a phylum of tiny parasites that live in the renal appendages of cephalopods.

specialised attachment organ of an animal

species of worm

The Dicyemidae is a family of tiny parasites that live in the renal appendages of cephalopods. It contains the following genera and species: Dicyema von Kolliker, 1849 Dicyemennea Whitman, 1883 Dicyemodeca Dicyemodeca anthinocephalum Furuya, 1999 - parasitizes Octopus dofleini Dicyemodeca deca (McConnaughey, 1957) Dicyemodeca dogieli Bogolepova, 1957 Dodecadicyema Kalavati & Narasimhamurti, 1979 Dodecadicyema loligoi Kalavati & Narasimhamurti, 1980 Pleodicyema Pleodicyema delamarei Nouvel, 1961 Pseudicyema Nouvel, 1933 Pseudicyema cappacephalum Furuya, 2009 Pseudicyema nakaoi F

species of worm

Haemadipsa is a genus of leeches, with members commonly known as jawed land leeches. These annelids are known from subtropical and tropical regions around the Indian and Pacific Ocean. Well-known Haemadipsa are for example the Indian Leech (Haemadipsa sylvestris) and the yamabiru or Japanese Mountain Leech (Haemadipsa zeylanica). Members of the genus feed on blood. They are troublesome to humans and animals especially because their bites result in prolonged bleeding.

Gordiidae is a family of parasitic horsehair worms belonging to the order Gordioidea.

Gordioidea is an order (sometimes placed at superfamily level) of parasitic horsehair worms. Its taxonomy remains uncertain, but appears to be contained in the monotypic class Gordioida and contains about 320 known species.

Nectonema is a genus of marine horsehair worms first described by Addison E. Verrill in 1879. It is the only genus in the family Nectonematidae described by Henry B. Ward in 1892, in the order Nectonematoidea, and in the class Nectonematoida. The genus contains five species; all species have a parasitic larval stage inhabiting crustacean hosts and a free-living adult stage that swims in open water.

species of mollusc

species of terrestrial leech

species of worm

Heterocyemida is an order of parasites which dwell in the renal appendages of cephalopods.