Figure 2 from: Ganske A-S, Edgecombe GD, Akkari N (2018) The peristomatic structures as a source of systematic characters in the genus Lithobius Leach, 1814 (Myriapoda, Chilopoda). In: Stoev P, Edgecombe GD (Eds) Proceedings of the 17th International Congress of Myriapodology, Krabi, Thailand. ZooKeys 741: 49-75. https://doi.org/10.3897/zookeys.741.21706

Figure 2 Details of transverse bulge, 'bottle-shaped' epidermal glandular shafts and median spine field of the epipharynx of Lithobiidae. A Disphaerobius loricatus; no transverse bulge; consistently two rows of 'bottle-shaped' epidermal glandular shafts; narrow and slightly medially widening median spine field B Lithobius (Lithobius) pyrenaicus; parallel aligned margins of a single transverse bulge; one row of 'bottle-shaped' epidermal glandular shafts; rhomboid and medially widening median spine field C Lithobius (Lithobius) fagei; single transverse bulge with parallel margins; more than one row of 'bottle-shaped' epidermal glandular shafts laterally; laterally widening median spine field D Lithobius (Sigibius) microps; single transverse bulge with non-parallel margins; subequal width of median spine field E Lithobius (Lithobius) mutabilis; single transverse bulge with non-parallel margins; one row of 'bottle-shaped' epidermal glandular shafts; subequal width of median spine field F Lithobius (Monotarsobius) aeruginosus; single transverse bulge with non-parallel margins; one row of 'bottle-shaped' epidermal glandular shafts; subequal width of median spine field. bu – transverse bulge, gl – 'bottle-shaped' epidermal glandular shafts, msp – median spine field.