APPENDIX 1.
Apparent shape of pseudocolumella in transverse or slightly inclined sections for different samples.
APPENDIX 2.
X-ray transverse sections all along the sample A57331-1 provided by the nanotom S phoenix 180 kV CT-scan of Georessources laboratory in Nancy. The images are ordered following the orientation from the lowest part of the sample (in living position) to its top.
APPENDIX 3.
X-ray transverse sections all along the sample AM16161 provided by the nanotom S phoenix 180 kV CT-scan of Georessources laboratory in Nancy. The images are ordered following the orientation from the lowest part of the sample (in living position) to its top and corresponds to the exploitable part of a longer fragment of Neorylstonia pseudocolumellata.
