Scanning electron microscopy of boreostrongylus seurati [nematoda: heligmosomidae] from the Egyptian desert gerbil gerbillus gerbillus with notes on its phylogeny

A heligmosomid nematode Boreostrongylus seurati, belonging to the subfamily Nippostrongylinae, was described and figured based on specimens collected from duodenum of Egyptian gerbil Gerbillus gerbillus [Olivier]. Both light and scanning electron microscopy were used to describe adult worms and their bursa and the synlophe. The ultrastructural morphology of some features of the worms was also described including mouth opening, cuticular surface, spicules, cephalic and bursal papillae