Subfamily Syndesinae MacLeay 1819 (stag beetle)
Insecta - Coleoptera - Lucanidae
Parent taxon: Lucanidae according to C. Y. Cai et al. 2022
See also Bouchard et al. 2011, Krell 2000 and Lawrence and Newton 1995
Sister taxa: Aesalinae, Ceruchitinae, Cretolucanus, Dorcasoides, Lampriminae, Litholampriminae, Lucaninae, Paleognathus, Paralucaninae, Prosinodendron, Protolucaninae
Ecology:
Distribution:
• Miocene of the Dominican Republic (1 collection)
• Eocene of United States (1: Colorado)
Total: 2 collections each including a single occurrence