Solifugae, so
class Arachnidae. Though I doubt that the slight distinction would have prevented the mass desertion of the Scots Greys ca. 1966.
Edited to add an anecdote that'll have 'phobes straining their fainting couches:
Years ago a pal of mine used to go on reptile-collecting trips to north Africa. This consisted of him and his mates wandering around hopefully, flicking rocks over to see what was lurking beneath. (Note:
Solifugae means "flees the light". You can see where this is going, can't you?)
He learned very rapidly that blousing one's pants into one's socks was good practice, when he turned over the wrong rock and one of the abominations depicted above sought refuge from the light by scuttling up inside his trouser leg...
maximus otter