Abstract
During a recent soil sample survey in Heidelberg at the Suikerbosrand Nature Reserve near Johannesburg in South Africa, a new entomopathogenic nematode species, collected from the grassland was discovered. Oscheius basothovii was isolated from soil samples using the Galleria mellonella bait method. Amplification and Sanger sequencing of the 18S ribosomal DNA placed the nematode in genus Oscheius. Morphological studies with light and scanning electron microscopy confirmed its anatomical affinities with the genus. The new species is characterised by various traits including its original 18S rDNA sequence, six lips, and amphidelphic reproduction. Males were characterised by the presence of spicules towards their posterior end and short blunt tails. Females had a body with irregular ridges, a vulva opening, and long pointed tails. The infective juveniles of this new species are able to invade Galleria mellonela and Tenebrio molitor larvae and cause mortality within 24–72 h after inoculation under laboratory conditions.
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