|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Trilobita - Phacopida - Cheiruridae
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. P. Tripp et al. 1997||A species of Sphaerocoryphe with sagittal length of pygidium 30 - 55 % exsagittal length, bearing short, divergent, upwardly inclined great spines; span across tips of first free points frequently exceeding span of tips of great spines. Genal spines stout, divergent. Single profixigenal spine. Prosopon of fixigena finer and denser than that of frontal lobe. Sutural ridge and socle of librigena weakly developed. Hypostome elongate, posterior margin convex backward.|