Female Proterogyrinus is a female Proterogyrinus from Walking with Monsters. Although she wasn't named or had her gender revealed, but she was with two large males. She was swimming around in the river swamp while she's with two male Proterogyrinus that fight each other. She then later battles an Arthropleura that invaded her territory. She sinks her teeth into her foe, but the arthropod's armor is his best defence. The Arthropleura raises up and the Proterogyrinus leaps on she pushes her foe and the arthropod falls onto a sharp wood stump which impaled the the creature, killing him instantly. The female Proterogyrinus then eats the soft exposed innards of her foe.