I’ve looked at this Sighting several times, and I agree that this does indeed look like one of the Anterynchium sp. but not confidently enough to Verify it for you. I’ve seen photos of similar (but not the same) in this Genus but there are so many that can look alike. I’ll pop it in as a Suggestion but I think there’s only myself or @SimonC who would Verify it at this stage😊
