This is the mask of "Il Magnifico", best known as Pantalone.
Pantalone was one of the Old Men of the Commedia scenarii. He originated in Venice as a wealthy, miserly, paranoid, lustful merchant; a model for Shylock in Shakespeare's "The Merchant of Venice". He professes poverty but money is his obsession. He finds elaborate ways to hoard it, count it, hide it, manipulate deals, and avoid spending. He is lascivious and thinks he is a master at seducing beautiful young women, but if he had to choose between a beautiful young woman and money, he would go first for the money. While he seems to control finances in the Commedia scene, he suspects that everyone is out to deceive him, and he may be right, since he usually gets duped in the end.
He complains about his physical ailments: aching back, bad knees, gout, etc. that conveniently come and go at his discretion. He is sometimes married to the La Signora character, and/or is the father of one of the young lovers (innamorata/o), or he is lusting after a sweet young thing. He wants his son or daughter to marry into a family with money, and is especially disgruntled by his lazy or lustful son.
His pelvis is tilted under but he is not hunched over, as one might mistakenly do in playing an old man. His knees are bent with his heels together, toes pointing outward; he runs and walks heels first. His hands and fingers actively fidget in counting money or holding his money pouch (which conveniently hangs down between his legs). In spite of being old and sick, he is surprisingly agile. He can be quite acrobatic when being foiled by servants, beautiful women, and his family.
Pantalone usually has a curled, pointed beard, red leggings, and a long cape (denoting higher status).
A comparable animal image for Pantalone is a turkey or rooster.