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Hi Jacob, and welcome to diptera.info forum.
Gymnosoma is a diffcult genus and I fear it's unfortunately not possible to go to the species level from your photos.

It's more effective and durable to add your photos directly to your thread instead of using links which may disappear after a while.

You should open a new thread for every species to attract the experts for fly-families but you may add several photos of different views to the same thread (see the FAQs).

Greetings, Eric