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Jumping spiders show some level of consciousness. They're intelligent predators that heavily use their sight to identify prey. They can recognise different prey types, learn their behaviours and adjust hunting strategies accordingly. A good example is how they are able to recognise when certain prey is acting odd, deduce it's injured and drop their stealthy approach for a more direct one. They're also capable of remembering their environment and using indirect and often complex paths to sneak up on prey.
Scientists have even observed them "dreaming", which is likely when they do the information processing required for such comparatively complex behaviours https://www.nationalgeographic.com/animals/article/jumping-spiders-dream-rem-sleep-study-suggests
Bold claim to go from REM in sleep-like state to dreams and consciousness, and the original paper is not making that claim.
All of this seems rather possible even with basic learning mechanisms on molecular level. Not sure why you would claim that this need consciousness. But if you have a paper on this topic I would be more than interested to read them.
No papers that are actually concrete. Most of it is just speculation.
I'm not a scientist, and for me personally it's enough to make me spend a bit longer thinking before immediately dismissing all insects as mindless automatons. Most probably are simple biological machines. Jumping spiders are however massive outliers in terms of insect intelligence, and a cursory Google search will provide a wealth of evidence for it.
I personally would also go as far as believing that they dream. I just don't believe there's a reasonable explanation for the REM like state other than some form of dreaming, even if rudimentary.
I'm not going to state that jumping spiders are fully conscious as 100% fact, there's not enough proof for that. But they do have a proven ability to learn, and an ability to make somewhat complex plans. And all I'm trying to say is that we need more research before dismissing them so certainly.
Not a scientist my self, but I studies biology and neuroscience more specifically - just left the field. I will look more into jumping spiders, since it's sounds interesting and I was not really aware that they are that different from other spiders. Now I'm more curious and I definitely agree that we need more research in general.