Diplogastridae, formerly Diplogasteridae, are a family of (roundworms) known from a wide range of habitats, often in commensal or parasitic associations with insects.
Description
Diplogastrid nematodes are characterized by a distinct "two-lobed"
pharynx (hence their name from the Greek διπλόος = "double" and γαστήρ = "stomach"), the second (posterior) lobe being composed mostly of
glandular tissue. Most known species also have at least one tooth, which has presumably allowed them to access many new food sources compared with the related nematodes of
Rhabditidae (including
Caenorhabditis elegans), most species of which feed on
bacteria. Several diplogastrid species also have a
polyphenism in their mouthparts, allowing resource specialization within species. The wide array of feeding modes in the Diplogastridae is reflected by the relatively high diversity and complexity of their mouth structures, which show accelerated rates of evolution in comparison with the Rhabditidae.
While Sudhaus and Lieven
Among the Diplogastridae is the nematode Pristionchus pacificus, a model organism for comparative developmental biology.
Genera
