Allodiplogaster sudhausi
Allodiplogaster sudhausi is a free-living nematode species in the Diplogastridae family. It was described in 2008 as "Koerneria sudhausi", before being moved to the genus "Allodiplogaster" in 2014. "A. sudhausi" is omnivorous. It predates on other nematodes, but can be cultured on "Escherichia coli" OP50 bacterium on agar. 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. The two morphs that differ in stoma dimension are termed stenostomatous  (narrow-mouthed) and eurystomatous (wide-mouthed). Cannibalism. "A. sudhausi" has displayed cannibalistic traits, with differences in behaviour observed between the stenostomatous and eurystomatous morphs. 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.