The Profile for the Snarehunter mentions they sing like birds so i think that's a major implication that they are supposed to be the same creature Hank Marlow was talking about
"Most explorers hear the ants before seeing them as their bird-like songs carry throughout the forest"
An implication for sure, but not confirmation. That said, we had been in touch with one of the game's staff members through development and he mentioned wanting to include the KSI ants, so we're gonna try to explore that avenue. Maybe we can get a word of confirmation.
The Boy Who Cried Godzilla found a mention in one of his emails with the lead designer. He alluded to "the Singing Ants that are heard in the film but never seen" as being part of the story.
That image from the website is most likely concept art. There is a finalized image in the PDF of a Valkyrie holding a deer and it resembles the one in the second image I uploaded. I think the main difference is with the antennae; Valkyries just have the tree branches, but Queens have pine needle-esque things at the ends.
I think the one standing on the ant hill is too small to be a Queen anyway. The campaign says the hills are 10 feet tall, so that ant is definitely not 130.
The two that the infobox images are cropped from and the one I mentioned with the deer are the only images of them. Currently trying to figure out how to keep transparency when extracting images from a PDF, because right now they have black backgrounds. Otherwise I'd have uploaded them.