This word is derived from Latin "Facula", torch. Another was Cluvia Facula, a prostitute, who supplied food to the Roman prisoners of war. Ellychnia facula is a species of firefly in the genus Ellychnia. Ular Facula is south of Sarpa Facula and northeast of Pampu Facula. Shikoku Facula is a region of bright material on Saturn's moon Titan. A typical example is Memphis Facula on Ganymede, a 340 km wide palimpsest. Shikoku Facula is named after Shikoku, the smallest of the four main Japanese islands. A facula (plural&colon; faculae ), Latin for "little torch", is literally a "bright spot".