DSV Alvin
"Paleodictyon nodosum" burrows were originally photographed in 1976 on the Galapagos Rift between 2400-3700m depth. Later, Seilacher and Rona used the deep-water submersible "DSV Alvin" to recover samples of the same form near the Mid-Atlantic Ridge. These samples were collected between 3430m and 3575m depth, around 26°N and 45°W. These burrows were found in very similar conditions as the ones found along the Galapagos Rift. The biggest similarity between the habitats of all "Paleodictyon nodosum" is that they are all found along divergent plate boundaries at both active and extinct hydrothermal vents.