"en-dessous de" ou "en dessous de" ?

Question

I believe "en-dessous de" may  not be correct , and "en dessous de" is correct. 
Contrasted with "au-dessous de" , which is correct. 
Any comments anyone ?
Thanks
Paul.
All I can find is this: https://www.question-orthographe.fr/question/au-dessous-de-et-en-dessous-de/

Céline Pickard · Accepted Answer

Bonjour Paul et Maarten,
Vous avez tout à fait raison ! This error has now been corrected.
Merci de votre excellente contribution !
Bonne journée !

Maarten Kamp · Answer

Elizabeth, 
Jim asked the same question recently. 
See link below for explanation : 
https://progress.lawlessfrench.com/questions/view/je-me-suis-egalement-fixe-un-seuil-minimum-de-2-500-e-sur-mon-compte-bancaire

Maarten Kamp · Answer

Paul, the link below confirms your thought. This distinction is listed under “difficulties - orthographe “ in Larousse. https://www.larousse.fr/dictionnaires/francais/dessous/24668#locution

elizabeth lippitt · Answer

If the speaker is female why is it not “je me suis fixée?”