Morphological structures in Essigella pini and in E. patchae: a URS in E. pini (slide-mounted specimen) b URS in E. patchae (slide-mounted specimen) c URS in E. pini (SEM) d URS in E. patchae (SEM) e genital plate in E. pini (SEM) f genital plate in E. patchae (SEM) g details in genital plate in E. pini (SEM) h details in genital plate in E. patchae (SEM).