Alien: Alien beast attributed to Dan O'Bannon (1977?) references Temps Futurs cover illustration (1976) by Moebius?

leading from

 Illustration of the Arzach character on the cover of Temps Futurs (1976) by Moebius
and
Alien: Alien beast attributed to Dan O'Bannon (1976/1977?)

a) Temps Futurs cover illustration (1976) by Moebius

 b) Alien beast attributed to Dan O'Bannon (1977?) in Book of Alien

c) Head with elongated hat is transformed into the creature's head and body, and so the face area of the man becomes the face area of the creature

d) Space between back of the man and the border of the drawing becomes the leg on the left of the creature, while the curve at the top of the man's arm becomes the inner curve of the leg joint.

e) The man's chest minus the area with the circle on the front becomes the leg on the right of the creature