|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.
|M. G. Bassett et al. 2012||Tubular outgrowth from inner organophosphatic shell of acrotretide brachiopod, with single circular aperture di- rected into mantle cavity, formed by abnormal deposition of sec- ondary shell produced by symbiotic reaction between brachiopod mantle and cohabitant.|