Cylindrichum Link, 1949
DESCRIPTION: Plugs (fillings of tubes) shaped like test tubes, rounded at lower end, not pointed,walls smooth, preserved in groups in convex hyporelief oriented perpendicular to bedding plane.
BEHAVIOR(S): Dwelling
ENVIRONMENTAL SETTINGS: Marine to continental, including alluvial, floodplains, lacustrine and eolian.
POSSIBLE TRACEMAKERS: Invertebrates (marine). Cicadas, beetles, sand wasps (continental).
GEOLOGIC RANGE: Devonian-recent.
ADDITIONAL REFERENCES: (Hasiotis, 2004)
REMARKS: Digitichnus (Ekdale and Picard, 1985; Ekdale, et al., 2007) and Pustulichnus (Ekdale & Picard, 1985) are assigned to Cylindrichum.