Diplocraterion (Torell, 1870)
Vertical, U-shaped burrow with spreiten; has arms that are parallel or divergent. Top of burrow forms a relatively wide semispherical bulb or dumbbell shape; tube can be indicative of protrusive (downward movement) or retrusive (upward movement) burrowing relative to the position of spreiten.
Dwelling (domichnia) burrow of a suspension feeder.
Marine intertidal and shallow subtidal environments and in deep-water environments, such as fans and distal shelves.
Emended by F¸«ärsich, 1974b. F¸«ärsich, 1974a; Fillion and Pickerill, 1990.