Fig. 7 in A new genus of terebratulid brachiopod from the Siegenian of the Rheinisches Schiefergebirge

Fig. 7. Rock slab with several specimens of Crassirensselaeria crassicosta (Koch, 1881) in life position (AEG 146−5), view of the underside of the bed. Upper Siegen Beds (middle Lower Devonian) of the Aegidienberg tunnel, Siebengebirge, topographical mapsheet 1:25 000 Königswinter 5309. Internal moulds in posterior view.