• Source: Diplogastridae

Diplogastridae, formerly Diplogasteridae, are a family of nematodes (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 sunk many generic names in their lumping approach of a revision, the Hungarian nematologist Istvan Andrassy was a "splitter", erecting and re-erecting many nematode taxa. The truth might be somewhere in between, as the approaches by Ragsdale and others have shown in recent years.
Among the Diplogastridae is the nematode Pristionchus pacificus, a model organism for comparative developmental biology.




Genera


Acrostichus
Allodiplogaster
Anchidiplogaster
Butlerius
Cephalobium
Cutidiplogaster
Demaniella
Diplogaster
Diplogasteriana
Diplogasteroides
Diplogastrellus
Fictor
†Formicodiplogaster (Fossil, Dominican Amber)
Goffartia
Heteropleuronema
Hugotdiplogaster
Koerneria
Leptojacobus
Levipalatum
Longibucca
Mehdinema
Micoletzkya
Mononchoides
Oigolaimella
Onthodiplogaster
Neodiplogaster
Parapristionchus
Parasitodiplogaster
Paroigolaimella
Pristionchus
Pseudodiplogasteroides
Rhabditidoides
Rhabditolaimus
Sachsia
Sudhausia
Teratodiplogaster
Tylopharynx




References

Kata Kunci Pencarian:

• Diplogastridae
• List of nematode families
• Pristionchus borbonicus
• Ficus citrifolia
• Androdioecy
• Cooperia oncophora
• Pristionchus pacificus
• Pristionchus
• Sudhausia
• Diplogasterida