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One of the skeletons, found in a lava tube (cave) at Aden Crater, adjacent to Kilbourne Hole, New Mexico, still had skin and hair preserved, and is now at the Yale Peabody Museum.
Originally this was believed to be a naturally formed lava tube cave and interpreted as possibly the place of Chicomoztoc, the place of human origin according to Nahua legends.
During a cave diving expedition to explore the Tunnel de la Atlantida, the world’s longest known submarine lava tube on Lanzarote in the Canary Islands, an international team of scientists and cave divers discovered the previously unknown species of crustacean, belonging to the remipede genus Speleonectes, along with two new species of annelid worms of the class Polychaeta.
The name hraun comes from the Icelandic word for lava. The Hraunfossar are situated near Húsafell and Reykholt and lava-tube cave Víðgelmir is close by.