|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Trilobita - Proetida - Phillipsiidae
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.
|R. E. Grant 1966||Cephalon semicircular in outline, genal spines absent. Glabella inflated, protruding anterior to border, with two small but prominent lateral pre-occipital lobes. Eyes small, near mid-length of cephalon. Thorax with nine segments. Pygidium short, with border but no border furrow. Ornamentation granular, present on all parts but strongest on cephalon.|