TO THE ORDER REDLICHIIDA
last revised 02 July 2007 by S.M.Gon III
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ORDER REDLICHIIDA
Compare the pictorial approach to the narrative equivalent below (salient features in color):
Compare the pictorial approach to the narrative equivalent below (salient features in color):
| ORDER REDLICHIIDA
Introduction: Primitive trilobites with numerous thoracic segments with spinose tips. Cephalon: large and semicircular; glabella typically long, well-segmented, tapering or expanding forwards; genal spines typically present, strong, usually continued from a narrow, tubular cephalic border; eyes typically large, crescentic, with large, inflated palpebral lobe ridges running toward front of glabella (anterior of S3); eye ridge may be subdivided; hypostome typically conterminant, very wide rostral plate. Thorax: with numerous segments (up to 60+), pleurae usually with spinose tips; may be subdivided into prothorax and opisthothorax. Pygidium: typically tiny (micropygous), one or very few segments. Occurrence: L. Cambrian to M. Cambrian. Suborders: Olenellina and Redlichiina. |
| Olenellina
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and | Redlichiina
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