This cover is a version of the Western series' "Star Trek" #22. The creature has the same pose and also shoots a ray, but the rest of the crew have different poses.
from Star Trek (Western, 1967 series) #22 (January 1974)
from Star Trek (Western, 1967 series) #7 (March 1970)
from Star Trek (Western, 1967 series) #25 (July 1974)
from Star Trek (Western, 1967 series) #14 (May 1972)
from Star Trek (Western, 1967 series) #13 (February 1972)
from Star Trek (Western, 1967 series) #18 (May 1973)