Pseudoxenodon is not a good species to keep.
They live very covered and feed hardly, I kept them some time ago.
Macropisthodon is a interesting genus, but they seems to be hard,too.

http://www.rear-fanged.com/macropisthodon.html

http://www.rear-fanged.com/pseudoxenodon.html

About Pseudoxenodon I can tell you more.
-----
www.rear-fanged.com