Polystira n. sp.
giant turrid | torreón gigante
Shell is slender or fusiform in shape with an ovate aperture and long, narrow siphonal canal. Sculpture of several uniformly-spaced, raised, spiral ribs, and with a prominent notch in the aperture of body whorl.
Size: 45-60 mm.
Ecology: inhabits offshore marine (15-100 m) waters, crawling on sediment surface; carnivorous predator of predominately polychaete worms; enormously diverse family, though typically rare as individuals.
Geological range: Late Miocene (11-9 million years ago).
Geographic distribution: Caribbean – Panama (endemic).