Spectacular Sculptoproetus Proetid Trilobite

Description: Fine example of a member of the Order Proetida with many fine details present. This one is similar to the well-known Cornuproetus but with 2 striking differences; the cephalic rim is more robust, and there are only 9 thoracic segments, many of which possess nodes. The Proetidae were among the last of the trilobites to go extinct in the Permian over 100 million years later. This is a fine example of the type, prepared with the dramatic backswept genal spines freestanding. Sculptoproetus haasi has been placed in the genus Timsaloproetus, but I am unsure whether this one should also join that genus.