|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Trilobita - Corynexochida - Illaenidae
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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.
|L. Amati and S. R. Westrop 2004||A species of Thaleops with strong longitudinal convexity. Muscle scar attachment sites well defined on internal moulds as two longitudinal ridges along the lateral margins of the glabella with a shallow depression between. Relict segmentation present on ventral surface of pygidial axis. Anterior margin of pygidial doublure with second, smaller pair of forward projections between larger pair of forward projections on either side of axis.|