Italiano: Typical teeth of Bransonella (A––D) and Barbclabornia (E––H) and their characteristic features. A –– Bransonella lingulata,

LP 16-3, from Kalinovskie Vyselki Quarry, Moscow Syneclise, Russia (Serpukhovian, late Mississippian), in labial view; B –– Bransonella nebraskensis, TMM 41648-139, in labial view; C –– Bransonella nebraskensis, TMM 41647-20, in lingual view, both from Nemaha County, Nebraska, USA (Virgilian ¼ Gzhelian, late Pennsylvanian); D –– Bransonella nebraskensis, LP 16- 2, from Kozhim River, Polar Urals, Russia (Visean, Mississippian), in lingual view; E –– Barbclabornia luedersensis, SMU 64112, from Wolf Creek, Texas, USA (Artinskian, Cisuralian), in labial view; F –– Barbclabornia luedersensis, SMNS 52067.1, from Jefferson County, Oklahoma, USA (Wolfcampian, Cisuralian), in labial view; G –– Barbclabornia luedersensis, SMU 64101, from Spring Creek, Texas, USA (Artinskian, Cisuralian), in lingual view; H –– Barbclabornia luedersensis, SMU 64056, from West Franklin Bend, Texas, USA (Artinskian, Cisuralian), in lingual view. Drawings based on figures from Ivanov & Ginter (1996: A, D), Johnson (1984; B, C; 2003: E, G, H) or are from the first author (F). Abbreviations: LP (Laboratory of Palaeontology, St. Petersburg University, Russia); SMNS (Staatliches Museum fu¨ r Naturkunde, Stuttgart, Germany); SMU

(Southern Methodist University, Dallas, Texas); TMM (Texas Memorial Museum, University of Texas, Austin).