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Diplogastridae, früher Diplogasteridae, sind eine Familie von Nematoden (Fadenwürmern), die aus einer Vielzahl von Lebensräumen bekannt sind und oft in kommensaler oder parasitärer Verbindung mit Insekten leben.[1]

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.[2]

While Sudhaus and Lieven [3] 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.[4] The truth might be somewhere in between, as the approaches by Ragsdale and others have shown in recent years.[5]

Among the Diplogastridae is the nematode Pristionchus pacificus, a model organism for comparative developmental biology.

Formicodiplogaster myrmenema dauer juvenile in Dominican amber

Vorlage:Reflist

Vorlage:Taxonbar

Category:Rhabditida Category:Nematode families Category:Burdigalian first appearances Category:Extant Miocene first appearances


Vorlage:Chromadorea-stub

  1. Sudhaus, W., Fürst von Lieven, A.: A phylogenetic classification and catalogue of the Diplogastridae (Secernentea, Nematoda). In: Journal of Nematode Morphology and Systematics. 6. Jahrgang, 2003, S. 43–90.
  2. V. Susoy, E.J. Ragsdale, N. Kanzaki, R.J. Sommer: Rapid diversification associated with a macroevolutionary pulse of developmental plasticity. In: eLife. 4. Jahrgang, 2015, S. e05463, doi:10.7554/eLife.05463, PMID 25650739, PMC 4357287 (freier Volltext).
  3. Sudhaus, W., Fürst von Lieven, A.: A phylogenetic classification and catalogue of the Diplogastridae (Secernentea, Nematoda). In: Journal of Nematode Morphology and Systematics. 6. Jahrgang, 2003, S. 43–90.
  4. Andrassy I: free-living nematodes of Hungary (Nematoda, Errantia) Vol 1. In: Pedozoologica Hungarica Nr.3. 2005.
  5. Kanzaki N, Ragsdale EJ, Giblin-Davis RM: Revision of the paraphyletic genus Koerneria Meyl, 1960 and resurrection of two other genera of Diplogastridae (Nematoda). In: ZooKeys. Nr. 442, 2014, S. 17–30, doi:10.3897/zookeys.442.7459, PMID 25349487, PMC 4205494 (freier Volltext).
  6. G.O. Poinar: The Evolutionary History of Nematodes: As Revealed in Stone, Amber and Mummies. In: Nematology Monographs and Perspectives Pages. 9. Jahrgang, 2011, S. 91–93, 239–240, 324–325.