Allodiplogaster sudhausi

Allodiplogaster sudhausi
Adult hermaphrodite
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Nematoda
Class:	Chromadorea
Order:	Rhabditida
Family:	Diplogastridae
Genus:	Allodiplogaster
Species:	A. sudhausi
Binomial name
Allodiplogaster sudhausi (Von Lieven, 2008)

Allodiplogaster sudhausi is a free-living nematode species in the Diplogastridae family. It was described in 2008 as Koerneria sudhausi,[1] before being moved to the genus Allodiplogaster in 2014.[2] A. sudhausi is omnivorous. It predates on other nematodes,[3] but can be cultured on Escherichia coli OP50 bacterium on agar.[1]

Mouth dimorphism

Like many other Diplogastridae, such as Pristionchus pacificus, A. sudhausi displays phenotypic plasticity, with a polyphenism in its adult mouth-form that leads to formation of one of two distinct stomas (mouth openings) of different dimensions.[1][4] The two morphs that differ in stoma dimension are termed stenostomatous (narrow-mouthed) and eurystomatous (wide-mouthed).[1]

Cannibalism

A. sudhausi has displayed cannibalistic traits, with differences in behaviour observed between the stenostomatous and eurystomatous morphs.[1]

Biocontrol

A. sudhausi is a potential biological control agent. It has been shown to feed on juveniles and eggs of the plant-pathogenic root-knot nematode Meloidogyne javanica in vitro, and introducing A. sudhausi to M. javanica-inoculated soil also reduced tomato root galling.[5]

References

1. von Lieven, A.F. (2008). "Koerneria sudhausi n. sp. (Nematoda: Diplogastridae); a hermaphroditic diplogastrid with an egg shell formed by zygote and uterine components". Nematology. 10 (1): 27–45. doi:10.1163/156854108783360087.
2. Kanzaki, N.; Ragsdale, E. J.; Giblin-Davis, R. M. (2014). "Revision of the paraphyletic genus Koerneria Meyl, 1960 and resurrection of two other genera of Diplogastridae (Nematoda)". ZooKeys (442): 17–30. doi:10.3897/zookeys.442.7459. PMC 4205494. PMID 25349487.
3. Yeates, G.W. (1969). "Predation by Mononchoides potohikus (nematode: Diplogasteridae) in laboratory culture". Nematologica. 15 (1): 3–9. doi:10.1163/187529269X00029.
4. Susoy, V.; Ragsdale, E. J.; Kanzaki, N.; Sommer, R.J. (2015). "Rapid diversification associated with a macroevolutionary pulse of developmental plasticity". eLife. 4 (4): 1–39. doi:10.7554/eLife.05463. PMC 4357287. PMID 25650739.
5. Bar-Eyal, M.; Sharon, E.; Spiegel, Y.; Oka, Y. (2008). "Laboratory studies on the biocontrol potential of the predatory nematode Koerneria sudhausi (Nematoda: Diplogastridae)". Nematology. 10 (5): 633–637. doi:10.1163/156854108785787271.