Diplocraterion (Torell, 1870)
ertical, U-shaped burrow with spreite; has arms that are parallel or divergent. Top of burrow forms a relatively wide semi-spherical bulb or dumbbell shape; tube can be indicative of protrusive (downward movement) or retrusive (upward movement) burrowing relative to position of spreite.
Dwelling burrow of a suspension feeder.
Found in intertidal and shallow subtidal environments and in deep-water environments like fans and distal shelves.
Emended by Fürsich, 1974b. Fürsich, 1974a; Fillion and Pickerill, 1990.