Description: Fine example of a member of the Order Proetida with many fine details present. This one is similar to the well-known Cornuproetus corntus but with 3 striking differences; the cephalic rim is more robust, there are only 9 thoracic segments, and the distalmost five segments bear spines.. 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. Looking more like a Devonian Stealth Bomber than a trilobite, this is an elegant example. Chatterton had recently described a pair of members he had termed Scupltoproetus A and B which he has placed in the new genus Timsaloproetus, but while possessing nodes on the thoracic segments, neither has full-blown spines as seen here. Recently, Fortey and Johnson erected several species in the genus Lepidoproetus, and gave the spiniferous taxon the name L. lahceni after the Moroccan trilobite collector Lahcen ait Hssaine.

Reference: Journal of Paleontology, 2012, pp 1032-1050