| Family | Common Name | Selected Genus and Species | Image |
|---|---|---|---|
| Aphelenchidae | Nematode | Aphelenchus avenae | |
| Aphelenchoididae | Red Ring Nematode | Aphelenchoides cocophilus | |
| Paraphelenchidae | Nematode | Paraphelenchus myceliophthorus | |
| Family | Common Name | Selected Genus and Species | Image |
|---|---|---|---|
| Anisakidae | Intestinal Nematode | Anisakis simplex |  |
| Ascarididae | Nematode | Toxocara cati |  |
| Ascaridiidae | Parasitic Roundworm | Ascaridia galli |  |
| Cosmocercidae | Nematode | Probstmayria bengalensis |  |
| Cucullanidae | Nematode | Cucullanus austropacificus |  |
| Heterakidae | Nematode | Heterakis vesicularis |  |
| Maupasinidae | Nematode | Maupasina seissi |  |
| Oxyuridae | Pinworm | Enterobius vermicularis |  |
| Toxocaridae | Large Roundworm | Neoascaris vitulorum |  |
| Family | Common Name | Selected Genus and Species | Image |
|---|---|---|---|
| Camallanidae | Parasitic Nematode | Procamallanus pacificus |  |
| Philometridae | Parasitic Nematode | Philometra fasciati |  |
| Family | Common Name | Selected Genus and Species | Image |
|---|---|---|---|
| Cylindrocorporidae | Nematode | Myctolaimus neolongistoma |  |
| Diplogasteridae | Nematode | Allodiplogaster sudhausi |  |
| Diplogasteroididae | Nematode | Dirhabdilaimus leuckarti | |
| Neodiplogasteridae | Nematode | Diplenteron colobocercus | |
| Odontopharyngidae | Nematode | Odontopharynx longicaudata |  |
| Family | Common Name | Selected Genus and Species | Image |
|---|---|---|---|
| Pharyngodonidae | Parasitic Nematode | Skrjabinodon trimorphi |  |
| Rhigonematidae | Parasitic Nematode | Dudekemia alpinensis |  |
| Thelastomatidae | Parasitic Nematode | Heth hamatus |  |
| Family | Common Name | Selected Genus and Species | Image |
|---|---|---|---|
| Agfidae | Parasitic Nematode | Agfa flexilis |  |
| Alirhabditidae | Nematode | Alirhabditis indica |  |
| Alloionematidae | Nematode | Alloionema similis |  |
| Brevibuccidae | Nematode | Brevibucca saprophaga |  |
| Bunonematidae | Nematode | Bunonema richtersi |  |
| Cephalobidae | Nematode | Chiloplacus symmetricus |  |
| Elaphonematidae | Nematode | Elaphonema mirabile |  |
| Heterohabditidae | Nematode | Heterohabditis bacteriophora |  |
| Heterorhabditidae | Nematode | Heterorhabditis indica |  |
| Odontorhabditidae | Nematode | Cheilorhabditis dacchensis |  |
| Panagrolaimidae | Nematode | Turbatrix aceti |  |
| Pangrolaimidae | Nematode | Panagrolaimus hygrophilus |  |
| Pterygorhabditidae | Nematode | Pterygorhabditis punctata |  |
| Rhabdiasidae | Nematode | Angiostoma lamotheargumedoi |  |
| Rhabditidae | Nematode | Caenorhabditis elegans |  |
| Robertiidae | Nematode | Robertia leiperi | |
| Steinernematidae | Nematode | Steinernema carpocapsae |  |
| Strongyloididae | Human Pathogenic Parasitic Roundworm | Strongyloides stercoralis |  |
| Syrphonematidae | Nematode | Alloionema similis | |
| Family | Common Name | Selected Genus and Species | Image |
|---|---|---|---|
| Acuariidae | Nematode | Acuaria europaea |  |
| Anguillicolidae | Nematode | Anguillicola crassus |  |
| Cystidicolidae | Nematode | Moravecnema segonzaci |  |
| Drilonematidae | Nematode | Siconema diducuncinum |  |
| Gnathostomatidae | Nematode | Echinocephalus pseudouncinatus |  |
| Gongylonematidae | Nematode | Gongylonema pulchrum |  |
| Habronematidae | Nematode | Habronema muscae |  |
| Onchocercidae | Nematode | Dirofilaria immitis |  |
| Physalopteridae | Nematode | Proleptus acutus |  |
| Setariidae | Nematode | Dipetalonema spirocauda | |
| Spirocercidae | Nematode | Spirocerca lupi |  |
| Spiruridae | Nematode | Mastophorus muris |  |
| Thelaziidae | Nematode | Thelazia callipaeda |  |
| Family | Common Name | Selected Genus and Species | Image |
|---|---|---|---|
| Amidostomatidae | Nematode | Amidostomum acutum |  |
| Ancylostomatidae | Old World Hookworm | Ancylostoma duodenale |  |
| Angiostrongylidae | Cat Lungworm | Aelurostrongylus abstrusus |  |
| Cloacinidae | Nematode | Labiostrongylus contiguus |  |
| Crenosomatidae | Lungworm | Crenosoma striatum |  |
| Dictyocaulidae | Lungworm | Dictyocaulus viviparus |  |
| Filaroididae | Lungworm | Oslerus osleri |  |
| Heligosomidae | Nematode | Nippostrongylus brasiliensis |  |
| Herpetostrongylidae | Nematode | Paraustrostrongylus trichosuri |  |
| Metastrongylidae | Nematode | Metastrongylus elongatus |  |
| Molineidae | Nematode | Nematodirus battus |  |
| Ornithostrongylidae | Nematode | Ornithostrongylus quadriradiatus |  |
| Pharyngostrongylidae | Nematode | Rugopharynx moennigi |  |
| Protostrongylidae | Goat Lungworm | Protostrongylus rufescens |  |
| Pseudaliidae | Lungworm | Skrjabinalius guevarai |  |
| Skrjabingylidae | Nematode | Skrjabingylus nasicola |  |
| Strongylidae | Nematode | Strongylus vulgaris |  |
| Syngamidae | Gapeworm | Syngamus trachea |  |
| Trichostrongylidae | Nematode | Trichostrongylus calcaratus |  |
| Uncinariidae | New World Hookworm | Necator americanus |  |
| Family | Common Name | Selected Genus and Species | Image |
|---|---|---|---|
| Allantonematidae | Insect-parasitic Nematode | Howardula phyllotretae |  |
| Anguinidae | Stem Nematode | Ditylenchus dipsaci |  |
| Belonolaimidae | Sting Nematode | Belonolaimus longicaudatus |  |
| Criconematidae | Ring Nematode | Mesocriconema xenoplax |  |
| Dolichodoridae | Nematode | Neodolichodorus persiangulfus |  |
| Fergusobiidae | Nematode | Fergusobia tumifaciens |  |
| Heteroderidae | Beet Cyst Eelworm | Heterodera schachtii |  |
| Hoplolaimidae | Lance Nematode | Hoplolaimus galeatus |  |
| Iotonchiidae | Nematode | Iotonchium fungorum | |
| Neotylenchidae | Nematode | Deladenus siricidicola |  |
| Pratylenchidae | Root Lesion Nematode | Pratylenchus penetrans |  |
| Sphaerulariidae | Nematode | Sphaerularia bombi |  |
| Tylenchidae | Nematode | Tylenchus devastatrix |  |
| Tylenchulidae | Citrus Nematode | Tylenchulus semipenetrans |  |