|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||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||Long, meandering furrows sunk into outer or inner side of Cretaceous oysters and pectinids; width 0.5 to 1.2 mm; resembling U-shaped tubes of Polydora but without spreite.|