Diplotriaenidae is a

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

spiruria Subclass Spiruria comprises mostly parasitic secernentean nematodes. In an alternate classification, they are treated as suborder Spirurina, with the orders listed here being ranked as infraorders. The Ascaridida and the Oxyurida, which includ ...

n nematodes. Like all their relatives, they have neither a

circulatory The blood circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate. It includes the cardiovascular system, or vascular system, tha ...

a or

respiratory system The respiratory system (also respiratory apparatus, ventilatory system) is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies grea ...

. They are the only family in

superfamily SUPERFAMILY is a database and search platform of structural and functional annotation for all proteins and genomes. It classifies amino acid sequences into known structural domains, especially into SCOP superfamilies. Domains are functional, str ...

Diplotriaenoidea, if the Oswaldofilariidae are correctly placed with the

Filarioidea The Filarioidea are a superfamily of highly specialised parasitic nematodes. Species within this superfamily are known as filarial worms or filariae (singular filaria). Infections with parasitic filarial worms cause disease conditions generical ...

and not here.

Systematics

Subfamilies In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end subfamily botanical names with "-oideae", and zoologi ...

and

genera Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial ...

of Diplotriaenidae are: Subfamily Diplotriaeninae *'' Quadriplotriaena'' *'' Diplotriaena'' - includes ''Diplotriaenoides'' *'' Chabaudiella'' Subfamily Dicheilonematinae *'' Monopetalonema'' - includes ''Politospiculum'' and ''Ornithosetaria'' *'' Petrovifilaria'' *'' Dicheilonema'' - includes ''Contortospiculum'' *'' Hastospiculum '' - includes ''Setarospiculum'' *'' Hamatospiculum'' - includes ''Parhamatospiculum'', ''Tytofilaria'', ''Oceanifilaria'' *'' Serratospiculum'' *'' Heterospiculum'' - includes ''Heterospiculoides'' *'' Serratospiculoides''

References

Spirurida Nematode families {{Secernentea-stub