PICTORIAL GUIDE
TO THE ORDER REDLICHIIDA
last revised 02 July 2007 by S. M. Gon III

Suborder Olenellina : Superfamily Olenelloidea
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(click on any of the below)
ORDER REDLICHIIDA
  Suborder Olenellina
    Superfamily Olenelloidea
    Superfamily Fallotaspidoidea
  Suborder Redlichiina
    Superfamily Redlichioidea
    Superfamily Emuelloidea
    Superfamily Paradoxidoidea
Suborder Olenellina Superfamily Olenelloidea
Click here to return to Olenellina Fact Sheet

Here are representative Olenelloidea:
olenellina

Olenellus
(Olenellus)
Olenelloides


Olenelloides
Paedeumias
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
Cephalon: glabellar outline concave, anterior glabellar lobe (LA) usually enlarged, glabella narrowest at L2 or S1, L3 usually modified distally with posterolateral part bending backward and encroaching on L2; ocular lobe connects only to posterolateral part of LA. Compare to Fallotaspidoidea (below).
Thorax: as in Olenellina.
Pygidium: as in Olenellina. 


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Walking Trilobite animation ©2000 by S. M. Gon III