Description of Helicotylenchus gerti sp. n. and new records of some species of Helicotylenchus (Steiner, 1945) from Ethiopia (Nemata: Hoplolaimidae)
Keywords:
Ethiopia, Helicotylenchus, new records, new species, plant-parasitic nematodes, SEM, taxonomyAbstract
One new and seven known species, belonging to the genus Helicotylenchus are reported from Ethiopia. Helicotylenchus gerti sp. n. is characterized by a hemispherical lip region, first two lip annuli broader than rest of lip annuli (1.0-1.3 vs 0.5-0.6 mm), stylet length (22-24 mm), exceptional size of median bulb valve (5-8 mm long and 4 mm wide), and presence of a long (6-9 mm) non-annulated digitate ventral tail projection. Morphometrics of Ethiopian populations of H. californicus, H. digonicus, H. dihystera, H. egyptiensis, H. martini, H. multicinctus and H. willmottae are provided. Six of these seven species (H. californicus, H. digonicus, H. dihystera, H. egyptiensis, H. martini and H. willmottae) are new records for Ethiopia.