what the heck is this zooid from 
i don't see this species or even have access to it in the version of Sipho that i have

srsly i want to know
(Also i don't have an email so rip)

That is the Sniper zooid.

It does not come from any species whatsoever, and is instead a random drop from bosses. It is only available in the Early Access version of Sipho that is available on Steam, along with a couple of other similar zooids.

A twitter post mentioned one of them as "Ancient", so I usually call these types of drop-only zooids "Ancient Zooids".

Oh ok

maybe in a future update they will add it in the demos, who knows

99.9999999999999999999999% chance that they won't add the Sniper or Grabber zooids in the Demo.