|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||Large, somewhat complex system of burrows consisting of circular tunnel with numerous (max 22) vertical shafts proceeding from it at equal intervals; shafts connect tunnel with surface of sediment; whole starlike system originated by congruent enlargement of ring-shaped tunnel in outward and downward direction; diameter of burrow up to 50 cm; probably feeding burrow.|