|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||Small circular conical mounds consisting of fecal castings, about 5 to 7 cm high, connected with a vertical burrow; somewhat similar to piles of fecal castings produced by Recent polychaete Arenicola; according to Simpson (1970, p. 150), these castings probably produced by the Zoophycos animal.|