Papposilenos was an aged silenos - (similar too, and in some cases indistinguishable from satyrs) who was something of a tutor to the infant Dionysos. As the god matured, Papposilenos's role transitioned to as Dionysos' majordomo.
4th century BC Apulian bell krater showing the bust of Dionysos beside a wee Papposilenos.
4th century BC Apulian lekythos showing Papposilenos playing the aulos and seated on a wine skin.
Iconographically, Papposilenos appears short, greying, often balding, and always fat. I started with an old 1986 Talisman satyr picked up for far too much on eBay. I sliced him across the stomach, cutting about 4/5 the way through and then bent his back to tilt his head up. I then greenstuffed him a baggy belly and hairy snail trail. The model was supposed to come with an aulos, but I replaced this with an amphora from castaway arts so it looks like he is having a good quaff.