Diplotriaenidae is a family of nematodes. Like all their relatives, they have neither a circulatory a or respiratory system. They are the only family in superfamily Diplotriaenoidea, if the Oswaldofilariidae are correctly placed with the Filarioidea and not here.
Systematics Subfamilies and genera of Diplotriaenidae are:
Subfamily Diplotriaeninae Chabaudiella Diplotriaena - includes Diplotriaenoides Quadriplotriaena Subfamily Dicheilonematinae Dicheilonema - includes Contortospiculum Hamatospiculum - includes Parhamatospiculum, Tytofilaria, Oceanifilaria Hastospiculum - includes Setarospiculum Heterospiculum - includes Heterospiculoides Monopetalonema - includes Politospiculum and Ornithosetaria Petrovifilaria Serratospiculoides Serratospiculum
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