Step 6: Add two lines between the pteranodon's head and body for the neck and an arc on the lower right side for the bottom half of the torso.
Step 7: Draw two lines on the lower right side of the body as guides for the legs.
Step 8: Draw two long curved lines on top of the pteranodon's body as guides for the first part of the wings. The guide for the wing on the left should be placed closer to the head. The guide for the wing on the right should start inside the circle. The longer these lines are, the longer the wings will be.
Step 9: Use a few more lines to complete the guide for the wings. Draw two short lines for the fold of the wing on the left and another long line for the bottom part of the wing on the right.
That's it for the initial sketch! From this point on, press harder with your pencil to get a more defined sketch.