This is what you google. If I go even further I can show you lists of people who argue that there are over 100 of these.Personally I subscribe to the theory that gender is a constantly evolving spectrum, rooted in both biological and social construct, and the large amount of variety of identity comes from a need to express oneself in a human culture that puts emphasis on labels and puts a LOT of emphasis on binary gender roles in nearly all aspects of life. In other words, we wouldn't need all these different terms if people stopped saying things like "THERE ARE ONLY THIS AMOUNT OF GENDERS. YOU ARE ONE OF THESE THINGS AND YOU HAVE NO OTHER CHOICE."
Several of those identities you claim don't exist (I suspect without actually doing any research on the subject) have had some small (I emphasize small) scientific research put into them. Specifically things like Agenderism and Bigenderism. I'm not arguing that those concepts are rooted completely in scientific fact.
But I am absolutely arguing that the historical evidence that supports that people of nonbinary and gender non-conforming identity have existed in many many cultures over thousands and thousands of years, and recently, we have some evidence to support that there may be some mental and biological links in the brain to contribute, and not nearly enough research has been done on the subject.
But you strike me as a "this is stupid so there's no reason to waste money doing research on it" kind of guy.
So around and around debating between two sides that will never ever change their mind we go....
That is why I said it is all made up to be different to separate themselves from the norm etc.
The List I posted and it was not all was also from this site.
http://thepbhscloset.weebly.com/a-list-of-genders--sexualities-and-their-definitions.html
But you also can find these on news media site like here for example
https://www.telegraph.co.uk/men/the...ossary-of-gender-identities-for-your-next-ce/
https://www.theguardian.com/world/2015/dec/29/gender-dictionary-2015
https://www.cbsnews.com/news/transgender-gender-identity-terms-glossary/
https://www.lifehacker.com.au/2016/...recognised-by-the-2016-australian-sex-survey/
And this goes on and on. And I love sceience but I do not see gender studies in general as science since they are not working with scientific methods to come to a conclusion (in most cases) If there are some I will glady read them.