Acadoparadoxides Trilobite Replica

Description

Acadoparadoxides Trilobite Replica measures 22×18 inches. Acadoparadoxides Trilobite Replica is museum quality polyurethane cast. Made in USA. Eoparadoxides is the scientific name. Location: Morocco. Age: Cambrian period.

Acadoparadoxides is an extinct genus of redlichiid trilobite belonging to the family Paradoxididae. These fast-moving low-level epifaunal carnivores lived in the Middle Cambrian about 535 million years ago.

Redlichiida is an order of trilobites, a group of extinct marine arthropods. Species assigned to the order Redlichiida Acadoparadoxides Trilobite are among the first trilobites to appear in the fossil record, about halfway during the Lower Cambrian. Due to the difficulty to relate sediments in different areas, there remains some discussion, but among the earliest are Fallotaspis (suborder Olenellina), and Lemdadella (suborder Redlichiina), both belonging to this order.

The first representatives of the orders Corynexochida and Ptychopariida also appear very early on and may prove to be even earlier than any redlichiid species. In terms of anatomical comparison, the earliest redlichiid species Acadoparadoxides are probably ancestral to all other trilobite orders and share many primitive characters. The last redlichiid trilobites died out before the end of the Middle Cambrian.

Most redlichiids are rather flat (or have low dorso-ventral convexity) and their exoskeleton typically has an oval outline.  Each back edge of the headshield (or cephalon) very often carries a spine, termed a genal spine.

The Acadoparadoxides eye lobes are sickle shaped, long and extend from the frontal lobe of the central raised area of the cephalon (or glabella) curving outward and increasingly backwards and sometimes eventually inwards again. The Acadoparadoxides Trilobite visual surface, that contains the calcite lenses is surrounded by fracture lines (or circumocular sutures), so that it has most often broken away from the rest of the cephalon. The Acadoparadoxides glabella tapers forward and is relatively long, with the frontal lobe boss like or pointy, followed by three rings or pairs of lobes and finally at the back of the cephalon the so-called occipital ring.

Additional information