Fig. 6

a Caudals 1 through 5 in lateral view arranged so that centra faces are as parallel as possible. Note that the MFN mount lacks the first caudal, which in other specimens is incorporated into the sacrum as a caudosacral (Hennig 1925). See text for further explanation. b Dorsal view of the sacrum, ilia, tail and distal tail spikes of the MFN mount in dorsal view, with tail copies flexed by 2°, 5° and 6°, respectively. Scale bars 0.25 m (a) and 0.5 m (b)