The term, "runner", granted, does sound fairly poor, but unless they bring it back in another film & officially name it, then there's not much else to call it really. Technically, it has already been officially labelled the "dog-alien" although this is partially untrue as it bursted from an ox in the special edition of A3. Really, all adult alien forms r just variations of drones, & a drone is, in turn, a variation of all other adult alien forms. Technically, if all information from the games were to be dismissed, then predaliens wouldn't be called predaliens, etc. so quite a fair bit of information on aliens & preds actually spawned from the games. Although quite alot of things is the games r completely rubbish, such as ravagers, & the like.