Large grey longhorn (?) for ID please

Large grey longhorn (?) for ID please

Observation - Large grey longhorn (?) for ID please - Global. Description: He was very big. I would guess that his body was about an inch long not counting appendages. Other than that, just what you see.Thanks for looking.

He was very big. I would guess that his body was about an inch long not counting appendages. Other than that, just what you see.Thanks for looking.