According to a thread over on Warseer a Chief on Terradon is not allowed to join unit of Terradon? Is this right?
Really? So (and I am just guessing here I really dont know the answer) a Brittonian Hero/Lord on a Pegasus can not join a unit of Pegasus Knights? That just does not sound logical to me.
No. The brett lord is out of luck! I believe the chiefs rules in our rule book allow him to join the unit.
To prove your point, look up the skink chief page in the army book where it specifically mentions they may join terradon units as an exception to the normal rules.