|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|W. Hantzschel 1975||Slender burrows with ropelike sculpture; 2 to 10 mm (max 20) in diameter; in half or full relief or flattened; linear and commonly curved, not branched, often crossing each other; parallel or vertical or oblique to bedding; sometimes showing slight “peristaltic” thickenings; outside covered by fine clustered wrinkles densly arranged; inner structure as on stuffed burrows with backfilling, visible if preserved in full relief.|