 The relationship between "Heteroscymnoides" and the rest of its family is uncertain.The longnose pygmy shark has been caught in the western Indian Ocean off eastern KwaZulu-Natal, in the southeastern Atlantic Ocean near the Walvis Ridge, and in the southwestern Pacific Ocean off Chile.These records suggest that it may have a circumglobal distribution in the Southern Hemisphere, inhabiting subantarctic waters and cold ocean currents, including the Benguela and the Humboldt.