Nematode families

The Ascarididae are a family of the large intestinal roundworms. Members of the family are intestinal parasites, infecting all classes of vertebrates. It includes a number of genera, the most well known of which are:

Oxyuridae is a family of nematode worms of the class Secernentea.

The Ancylostomatidae are a family of worms that includes the hookworms.

The Anisakidae are a family of intestinal nematodes (roundworms). The larvae of these worms can cause anisakiasis when ingested by humans, in raw or insufficiently cooked fish.

Heteroderidae is a family of nematodes. The name comes from the Greek heteros = other and deras = skin (derm). This "refers to the different 'skins' of female and cyst."

The roundworm family Trichuridae includes the type genus Trichuris and some less widely known members. They are (after the abolishment of the artificial "Adenophorea" assemblage) placed in subclass Dorylaimia of the class Enoplea; however, the former might be better treated as a class in its own right. That nonwithstanding, their order (Trichocephalida) has been known under alternate names in the past, namely Trichiurida.

Filariidae is a family of nematodes belonging to the order Rhabditida.

Mermithidae is a family of nematode worms that are endoparasites in arthropods. As early as 1877, Mermithidae was listed as one of nine subdivisions of the Nematoidea. Mermithidae are confused with the horsehair worms of the phylum Nematomorpha that have a similar life history and appearance.

The Onchocercidae are a family of nematodes in the superfamily Filarioidea. This family includes some of the most devastating human parasitic diseases, such as lymphatic filariasis, onchocerciasis, loiasis, and other filariases.

thumb|Toxocara canis adult worms The Toxocaridae are a zoonotic family of parasitic nematodes that infect canids and felids and which cause toxocariasis in humans (visceral larva migrans and ocular larva migrans). The worms are unable to reproduce in humans.

The family Trichinellidae includes the genus Trichinella.

The Rhabditidae are a family of nematodes which includes the model organism Caenorhabditis elegans.

Trichostrongylidae is a family of nematode in the suborder Strongylida.

The Syngamidae are a family of nematodes which commonly parasitize mammals, birds, and rarely humans. They are classified in the Strongyloidae superfamily and Strongylata order.

Strongyles (from Greek strongulos 'round'), or alternatively, strongyls, are nematode worms of the family Strongylidae, order Strongylida. They are often parasitic in the gastrointestinal tract of mammals, especially grazers such as sheep, cattle, and horses.

Tylenchidae is a family of nematodes. They are an important group of soil dwelling species that frequently contributes as much as 30% to the nematode species richness of soil samples. They diverged relatively early on and many species pose little risk to economically important plant species. Due to their early divergence, species tend to have relatively basal characteristics. They tend to be small and slender with small and delicate piercing mouthparts.

Anguinidae is a family of nematodes.

Desmodoridae is a family of nematodes belonging to the order Desmodorida.

The Metastrongylidae are a family of nematodes.

Panagrolaimidae is a family of nematodes belonging to the order Rhabditida.

Spiruridae is family of nematodes in the order Spirurida. An unidentified parasitic larval member of this family has been recorded in the marsh rice rat (Oryzomys palustris) in a salt marsh at Cedar Key, Florida, and also in fiddler crabs (Uca) there; it is perhaps a bird parasite that does not reach maturity in the rice rat.

Oncholaimidae is a family of nematodes belonging to the order Enoplida.

Thelaziidae is a family of spirurian nematodes, which form the mid-sized lineage of the superfamily Thelazioidea. Like all nematodes, they have neither a circulatory nor a respiratory system.

Criconematidae is a family of nematodes belonging to the order Tylenchida.

Chromadoridae is a family of nematodes belonging to the order Chromadorida.

Pratylenchidae is a family of plant pathogenic nematodes.

Leptolaimidae is a family of nematodes belonging to the order Araeolaimida.

Cylindrocorporidae is a family of nematodes belonging to the order Diplogasterida. Members of this family are either parasitic to frogs or bats.

Tripyloididae is a family of nematodes belonging to the order Araeolaimida.

Microlaimidae is a family of nematodes belonging to the order Desmodorida.

Sphaerolaimidae is a family of nematodes belonging to the order Monhysterida.

Strongyloididae is a family of nematodes belonging to the order Rhabditida.

Dracunculidae is a family of parasitic nematodes belonging to the order Camallanida. All Dracunculidae are obligate tissue parasites of reptiles, birds, or mammals.

Dictyocaulidae is a family of nematodes belonging to the order Rhabditida.

Linhomoeidae is a family of nematodes belonging to the order Monhysterida.

Axonolaimidae is a family of marine nematodes belonging to the order Araeolaimida.

Siphonolaimidae is a family of nematodes belonging to the order Monhysterida.

Aphelenchoididae is a nematode family in the order Aphelenchida.

Thelastomatidae is a family of nematodes belonging to the order Rhabditida.

Monoposthiidae is a family of nematodes belonging to the order Desmodorida.

thumb|left|A fly infected with Howardula nematodes Allantonematidae is a family of insect-parasitic nematodes from the order Tylenchida. Allantonematid nematodes infect a variety of insects including beetles, butterflies, flies, thrips, ants, and more. For instance, the nematode Howardula aoronymphium parasitizes mushroom-feeding fruit flies, Formicitylenchus oregonensis parasitizes carpenter ants, and Metaparasitylenchus hypothenemi parasitizes a pest of coffee beans, the coffee berry borer.

Aponchiidae is a family of nematodes belonging to the order Monhysterida.

Camallanidae is a family of nematodes belonging to the order Camallanida.

Desmoscolecidae is a family of nematodes belonging to the order Desmoscolecida.

Selachinematidae is a family of nematodes belonging to the order Desmodorida.

Cyatholaimidae is a family of nematodes belonging to the order Desmodorida. The family contains 20 genera most of which are found in marine environments.

Comesomatidae is a family of nematodes belonging to the order Araeolaimida.

Ceramonematidae is a family of nematodes belonging to the order Desmodorida.

Belondiridae is a family of nematodes belonging to the order Dorylaimida. They are small to medium sized, being around 0.7-2 mm in length.

Physalopteridae is a family of spirurian nematodes, which belongs to the superfamily Physalopteroidea. Like all nematodes, they have neither a circulatory nor a respiratory system.

Teratocephalidae is a family of nematodes belonging to the order Araeolaimida.

Haliplectidae is a family of nematodes belonging to the order Araeolaimida.

Epsilonematidae is a family of nematodes belonging to the order Desmodorida.

Aphelenchidae is a family of nematodes belonging to the order Aphelenchida.

Xyalidae is a family of nematodes belonging to the order Monhysterida.

Phanodermatidae is a family of nematodes belonging to the order Enoplida.

Cucullanidae is a family of parasitic nematodes, created by Cobbold in 1864. It includes the following genera:

Acuariidae is a family of spirurian nematodes. Like all nematodes, they have neither a circulatory nor a respiratory system. They are the only family in superfamily Acuarioidea, and number about 40 genera and 300 species, most of which are parasites of birds.

Draconematidae is a family of nematodes belonging to the order Desmodorida.

Paraphelenchidae is a family of nematodes belonging to the order Aphelenchida.