Here are representative Olenelloidea:
| ORDER
REDLICHIIDA Suborder Olenellina Superfamily Olenelloidea Superfamily Fallotaspidoidea Suborder Redlichiina Superfamily Redlichioidea Superfamily Emuelloidea Superfamily Paradoxidoidea |
| Suborder Olenellina | Superfamily Olenelloidea |
Olenellus (Olenellus) |
Olenelloides |
Olenellus (Paedeumias) |
Compare the pictorial approach to the narrative equivalent below (salient features in color):
| Suborder Olenellina
Cephalon: lacking facial sutures; glabella typically with rather deep lateral furrows; in some species the front glabellar lobe is an almost circular boss; conterminant hypostome, very wide rostral plate extending between genal angles, with perrostral suture (no connective sutures). Thorax: with numerous segments, non-fulcrate; axis often spine-bearing. Pygidium: narrow, with few segments. Other: earliest trilobites in Cambrian stratigraphy; no calcified protaspis known; body flattened; cuticle thin. Superfamilies: Olenelloidea, Fallotaspidoidea Superfamily Olenelloidea |
