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Raski (1962)
established the genus Gracilacus to differentiate
Paratylenchus species
with a stylet longer than 48 um.
Authorities remain split on the validity of
Gracilacus. Some retain it as a valid genus (e.g. Andrassy, 2007) while
others assign the Gracilacus species to
Paratylenchus (e.g. Nguyen et al., 2004, Ghaderi et al., 2014) (Ghaderi
et al., 2016),
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