background and objectives: entomopathogenic nematodes, belonging to the family heterorhabditis and steinernematidae, are reported to be symbiotically associated with specific bacteria and the secondary metabolites produced by these bacteria possess antimicrobial activity. in this study, bacteria were isolated from nematodes belonging to the family rhabditidae, and the antimicrobial activity was...

The new gonochoristic member of the Caenorhabditis Elegans group, C. brenneri sp. n., is described. This species is reproductively isolated at the postmating level from its sibling species, C. remanei. Between these species, only minute morphological differences are found, but there are substantial genetic differences. The stem species pattern of the Elegans group is reconstructed. C. brenneri ...

Pristionchus spp. nematodes exhibit several traits that might serve as pre-adaptations to parasitism. Under harshenvironmental conditions, these nematodes can arrest development and form dauer larvae. In addition, they have been shown to live innecromenic association with a range of beetles, including dung beetles (Geotrupes stercorosus) on which, for example, Pristionchusentomophag...

Based on the SYSTERS protein family database, we present taxon-related protein family frequencies and distributions. A set of taxon-related protein families is a subset of the whole family set with respect to one taxon, where taxon is not restricted to the species level but may be any rank in the taxonomy. We examine eight ranks in the lineages of seven organisms. A strong linear correlation is...