Figure 2 from: Kanzaki N, Ragsdale E, Giblin-Davis R (2014) Revision of the paraphyletic genus Koerneria Meyl, 1960 and resurrection of two other genera of Diplogastridae (Nematoda). ZooKeys 442: 17-30. https://doi.org/10.3897/zookeys.442.7459

Figure 2 - Schematic drawings of the generic characters of Koerneria and Allodiplogaster. From left to right: stenostomatous form, eurystomatous form, female tail, and male tail characters. From top to bottom: Koerneria, aquatic Allodiplogaster ("striata" species group) and two types of terrestrial Allodiplogaster ("henrichae" species group). For the stenostomatous form of Allodiplogaster sudhausi (not shown), see Fürst von Lieven (2008). Squared bracket indicates cheilostom, which as undivided separates Koerneria from Allodiplogaster. Further diagnosing Koerneria is the arrangement of male genital papillae v5-v7. Unique to the striata group of Allodiplogaster relative to the henrichae group and to Koerneria are a long tail in both sexes, setiform genital papillae, and in many cases setiform labial papillae. Genital papillae and phasmids are labeled following the terminology in Sudhaus and Fürst von Lieven (2003). The phasmids are not clearly described in species of the striata group.