|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Trilobita - Redlichiida - Olenellidae
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.
|H. J. Harrington 1956||Olenellinae with well advanced genal spines. Metagenal spines ab- sent in the adult. Metagenal angle sub-rectangular. Glabella parallel-sided with three pairs of lateral glabellar lobes, the an- terior (4p) narrower than the remainder and ill-defined. Frontal glabellar lobe not expanded, evenly rounded anteriorly, slightly encroaching over anterior border of cephalon. Eye lobes short, posterior, reaching level of mid-length of preoccipital glabellar lobe. Cephalic border wide, slightly raised andlflat.|