Reference

Günther Bechly, Volker Jürgen Sach (2002): An interesting new fossil dragonfly (Anisoptera: Libellulidae: “Brachydiplacini”) from the Miocene of Germany, with a discussion on the phylogeny of Tetrathemistinae and a fossil list for the locality Heggbach – Stuttgarter Beiträge Naturkunde Serie B [Paläontologie] – 325_B: 1 - 11.