Skolithos (Haldeman, 1840)
Straight vertical to slightly inclined cylindrical burrows with a very thin, discontinuous lining. Burrows can be slightly J-shaped. Walls of burrow are smooth with structureless fill. Burrows are parallel, do not branch, cross, nor interpenetrate.
Domichnia (dwelling). From this dwelling burrow, the constructor can suspension feed or conduct ambush predation.
Found in every type of environment from marine to continental terrestrial and aquatic. Present in high-energy marine conditions, especially in nearshore shallow marine facies, deep marine submarine channels and canyons; continental fluvial, floodplain, lacustrine, and eolian settings.
Wide range of tracemakers: worms, phoronids, and arthropods such as insect nymphs and larvae, spiders.
Cambrian-recent in marine environments; Silurian–recent in continental environments.
Emended: Alpert 1974, Fillion and Pickerill 1990
Similar in morphology to Cylindrichum
or partially preserved Arenicolites
Click on image for larger view and description