Examples of spines and bristles flanking the median crest margins of hypopharynx of Lithobius. A–C flattened spines with a transition to branching bristles on the inner rows ALithobius (Lithobius) pelidnusBLithobius (Monotarsobius) franciscorumCLithobius (Lithobius) muticus; Inset: detail of structured surface of flattened spines D–E continuously branching bristles flanking the median crest DLithobius (Sigibius) microps; stout and short branching bristles ELithobius (Lithobius) piceus; slender and long branching bristles FLithobius (Lithobius) forficatus; flattened spines flanking median crest margin. A–B, D–E top is medial; C top is ventral; F top is dorsal.

  Part of: 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