|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||Variously shaped straight or slightly sinuous tunnels in shells of brachiopods, seldom in pelecypods or gastropods; not branched; walls smooth; commonly with 1 or rarely 2 openings; sometimes with enlarged ends or conical; ends rounded or somewhat acute; 1 to 30 mm long, diameter 0.1 to 1.4 mm, diameter of openings 0.2 to 0.5 mm.|