Everything about Redlichiina totally explained
Redlichiina is a suborder of the order
Redlichiida of
Trilobites. The suborder contains three superfamilies:
Emuelloidea,
Redlichioidea and
Paradoxidoidea. These trilobites are some of the oldest trilobites known. They originated at the beginning of the
Cambrian era and disappeared (possibly by evolving into members of the
Ptychopariida order) at the end of the middle Cambrian.
Physiology
(See the
Trilobite article for a definition of morphological terms)
Cephalon: Opisthoparian facial sutures. Early forms tend to have tapering, conical glabella with furrows extending far backwards while later forms with glabella expanding forwards to inflated frontal lobe. The hypostome is conterminant (for example,
Redlichia) or natant (for example,
Dolerolenus). The rostral plate is narrower than in suborder
Olenellina, bound by rostral and connective sutures.
Thorax: Fulcrate or non-fulcrate, typically with many segments (60+ in an Emmuelid). The axis is infrequently spine-bearing.
Pygidium: Typically small, but can be larger and with many segments.
Further Information
Get more info on 'Redlichiina'.
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