Compare the pictorial approach above with the purely descriptive narration below:
Introduction: similar to Odontopleuroids, spiny, surface finely to coarsely granulose.
Cephalon: opisthoparian sutures; glabella narrow or broad based, tapering forward, less complex lobation than in Odontopleuroidea; genal spines typically present.
Thorax: with up to 13 segments, less specialized than in Odontopleuroidea, more as in typical polymerids
Pygidium: longer pygidia than in Odontopleuroidea, with more axial segments; tapering axis, thicker-set marginal spines, 1-7 pairs of pleural pygidial spines of varying length
Here are two representative Dameselloidea
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Walking Trilobite animation ©2000 by S. M. Gon III