What makes you think this is related to Stauropus alternus?
Did you look at the number of proleg pairs (the "false" legs on the abdominal segments) - this is the first big clue as to which family the caterpillar belongs.
Geometridae larvae have only one or two pairs of prolegs. They are the looper caterpillars, or inchworms, or "measurers".
Some Drepanidae larvae also have only two or three pairs of prolegs.
Noctuidae have (depending on subfamily) between two and four pairs of prolegs - most Catocalinae and Plusiinae have three, sometimes two pairs of prolegs and have a looping locomotion modes - they are often known as semiloopers.