69313 Geotria macrostoma (Burmeister, 1868) Geotriidae Southern lampreys Petromyzontiformes Petromyzonti South America and Southwest Atlantic Islands: De la Plata River, Uruguay; de la Plata River to Tierra del Fuego, Argentina; Malvinas (Falkland) Islands, South Georgia. One record in a river tributary of Magellan Strait in Chile.