Figure 2 in The guild of saprobiontic nematodes associated with ants (Formicoidea)

Figure 2. Comparison of original sketches of ensheathed third-stage juveniles of Oscheius cf. janeti (A, D–F) with drawings based on de Man (1894) of a dauerlarva of O. janeti from the postpharyngeal glands of Formica (B–C) in lateral view. A, B) Anterior ends, showing the distinctive lip region and long, narrow stoma (pharyngeal collar not shown). C, E) Tail ends of the corresponding specimens (A/E, B/C). D, F) Tail ends of two further dauerlarvae. One difference in my specimens was the dorsal notch anterior of the drill-like tail end.