Habronematoidea is a superfamily of spirurian nematodes in the large order Spirurida. Like all nematodes, they have neither a circulatory nor a respiratory system.
Cucullanidae is a family of parasitic nematodes, created by Cobbold in 1864. It includes the following genera:
Batillipes is genus of tardigrades, the only genus in the family Batillipedidae. It was first described by Ferdinand Richters in 1909.
Diplopeltidae is a family of roundworms in the class Chromadorea.
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.
Cystidicola is a genus of parasitic nematodes, belonging to the family Cystidicolidae. Species of Cystidicola are parasitic in the swimbladder of fish.
Ascarophisnema is a genus of parasitic nematodes, belonging to the family Cystidicolidae. Species of Ascarophisnema are parasitic as adults in the gastrointestinal tract of fish. According to the World Register of Marine Species, the genus currently (2019) includes a single species, Ascarophisnema tridentatum.
Metabronemoides is a genus of parasitic nematodes, belonging to the family Cystidicolidae. Species of Metabronemoides are parasitic as adults in the gastrointestinal tract of fish.
Moravecnema is a genus of parasitic nematodes, belonging to the family Cystidicolidae. Species of Moravecnema are parasitic as adults in the gastrointestinal tract of fish. According to the World Register of Marine Species, the genus currently (2019) includes a single species, Moravecnema segonzaci, which is a parasite in a deep-sea fish.
Cristitectus is a genus of parasitic nematodes, belonging to the family Cystidicolidae. Species of Cristitectus are parasitic as adults in the gastrointestinal tract of fish. According to the World Register of Marine Species, the genus currently (2019) includes a single species, Cristitectus congeri, which is a parasite of the European conger.
Prospinitectus is a genus of parasitic nematodes, belonging to the family Cystidicolidae. Species of Prospinitectus are parasitic as adults in the gastrointestinal tract of Tuna fish.
Terranova is a genus of parasitic nematodes. Species from this genus are known to parasitise sharks, rays, sawfishes, teleosts and crocodilians.
Allodiplogaster is a genus of nematodes (roundworms) in the family Diplogastridae that currently includes about 35 described species.
Raphidascarididae is a family of roundworms in the order Ascaridida. It encompasses nine genera, including Hysterothylacium, which parasitize marine fish, and Raphidascaris. The family contains over 190 species.
Xyalidae is a family of nematodes belonging to the order Monhysterida.
Camacolaimidae is a family of nematodes belonging to the order Araeolaimida.
Xennella is a genus of nematodes belonging to the family Xennellidae.
Daptonema is a genus of nematodes belonging to the family Xyalidae.
Enoploides is a genus of nematodes belonging to the family Thoracostomopsidae.
Mesacanthion is a genus of nematodes belonging to the family Thoracostomopsidae.
