Wyrmgender is a xenogender that is draconic in nature, similar to dragongender and dracogender, but it differs in that the gender itself feels like it is a dragon/that belongs to a dragon, as opposed to being a gender connected to dragons.
History
Wyrmgender was coined by a Twitter account that is now deleted, but they created a carrd[1] with information about the gender.
Flag
The flag has seven stripes, with the top three representing the earth, and the bottom three representing the sky. The symbol on the center of the flag was also used by the Pyralignment System of genders, since they're both genders that are draconic in nature.