|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||Threadlike, cylindrical burrows, 10 mm to 35 mm long; diameter less than 1 mm; straight or very slightly curved; branched or unbranched; typically vertical but also inclined to bedding plane or horizontal; with distinct walls, commonly line with diagenetic minerals such as pyrite or rarely calcite.|