Steinernema nguyeni  Malan, Knoetze & Tiedt, 2016

Summary: Steinernema nguyeni was recovered by baiting from beneath 
an Olea africana tree in South Africa. The combination of morphological and
molecular features suggests that it is a member of the feltiae-group.
The species is morphologically characterised by the infective juvenile
body length of 737 (673-796) μm and the infective juvenile lateral
field pattern = 2, 8, 2. The first generation male can be recognised
by the spicule length of 66 (58-75) μm and a gubernaculum length of
43 (30-55) μm. The first generation female can be recognised by the
slightly protruding vulval lips and the presence of low, double-flapped
epiptygmata. Analysis of the ITS (KP325084) and D2-D3 (KR815816)
regions of the ribosomal DNA confirmed that S. nguyeni differed from
all other known Steinernema species.           

Patronym in honour of Dr Khuong B. Nguyen for his work on
entomopathogenic nematodes.