Esophagi: A. Cylindrical, e.g. Mononchus; B. Dorylaimoid, e.g. Dorylaimus; C. Bulboid, e.g. Ethmolaimus; D. Rhabditoid, e.g. Rhabditis; E. Diplogasteroid, e.g. Diplogaster; F. Tylenchoid, e.g. Tylenchorhynchus; G. Tylenchoid, e.g. Helicotylenchus; H. Tylenchoid, e.g. Neotylenchus; I. Aphelenchoid, e.g. Aphelenchus (From Hirschmann).