Do you know of any place where one could simply contribute?
Bugguide seems to be North America only, but while I stayed in a remote area of the Indio Maiz reserve in Nicaragua I stumbled upon a spider that I haven't identified in years and can't quite find any place to simply share the photo[0].
Without having the eye arrangement is not easy, but taking in mind the habitat and shape, a member of Ctenidae would be my first candidate
Compare for example with Ancylometes or Ctenus.
If not, we could start weaving further from there. Zoropsidae, Lycosidae or Sparassidae (check Heteropoda venatoria for example) would be other acceptable family candidates. Those last couple of legs seem very characteristic.
Definitely Araneomorpha Lycosoidea, so there are ten families of interest or so. We don't have the eyes so we'll never know. Cuppiennius appears often in banana leaves, but doesn't have that strange angle in the last legs (Maybe is an abnormal specimen or an effect of the camera?).
The legs were definitely like that, and it's too bad I didn't get the eyes then!
I wouldn't be surprised if it wasn't particularly known, considering it was deep within the Indio maiz reserve (not just by the only town of Greytown but 5-10 hours by boat into the reserve from there)
Yes, iNat is worldwide and that's the first place I'd try.
That said, I wouldn't necessarily expect a whole lot. I'm not even an amateur arachnologist, but my sense is that spiders are about as complicated as hymenopterans, if not more so; especially outside well-known families like the salticids, it seems like it's not rare to find difficult identifications.
Bugguide seems to be North America only, but while I stayed in a remote area of the Indio Maiz reserve in Nicaragua I stumbled upon a spider that I haven't identified in years and can't quite find any place to simply share the photo[0].
[0] unknown spider on a banana leaf in eastern Nicaragua: https://i.imgur.com/iFMJxtl.png