Ancestry
Source GM Core pg. 246
While many of the ancestries who visited the Pact Worlds after the Gap would've been unheard of on ancient Golarion, there is no shortage of opportunities to include your favorite aliens in the Lost Omens setting. From the galaxy-spanning elven aiudara gates to the spacefaring Azlanti Star Empire, having an ancient civilization return from other worlds with other species in tow is just one of the countless ways you can incorporate a species from beyond the stars in your Pathfinder adventures. There are also Starfinder-exclusive heritage options for existing Pathfinder ancestries, but whether using an ancestry or heritage, you should be aware of the nuanced mechanical differences between the two games.
Darkvision and other forms of special senses are much more common in Starfinder than Pathfinder. While some GMs might wish to incorporate items from Starfinder to make up the difference, you might want to adjust the Starfinder ancestries and ancestry feats that confer special forms of vision by lowering the range or raising the level of the feat that confers the special sense. You should also be wary of special movement speeds, such as climbing and flight, that become available at a much lower level in Starfinder. While some Pathfinder adventures might not mind the low-level access to these speeds, you might want to adjust by instead using the progression of movement speed–related ancestry feats presented to other ancestries in Pathfinder.
Darkvision and other forms of special senses are much more common in Starfinder than Pathfinder. While some GMs might wish to incorporate items from Starfinder to make up the difference, you might want to adjust the Starfinder ancestries and ancestry feats that confer special forms of vision by lowering the range or raising the level of the feat that confers the special sense. You should also be wary of special movement speeds, such as climbing and flight, that become available at a much lower level in Starfinder. While some Pathfinder adventures might not mind the low-level access to these speeds, you might want to adjust by instead using the progression of movement speed–related ancestry feats presented to other ancestries in Pathfinder.