Unrepeatable migration of Ampyx priscus
 Era: Paleozoic
 Period: Lower Ordovician
 Stage: Tremadocian (485.4 - 477.7 Ma)
 Location: Beni Zouli , Drâa-Tafilalet Region, Zagora Province , Morocco
 Horizon: Ampyx & Euloma
Coordinates: 30°31'02.6"N 5°56'33.8"W
 Matrix measurements: 255 x 37 x 13 mm / 10.04"x 1.46" x 0.51"
 Largest trilobite measurement: Width 24 mm / 0.945" Length 57 mm / 2.24"
 Weight: 1742 g / 3,841 lb
 Description: A unique piece from the Fezouata Formation. In 2019, scientist Jean Vannier presented research in Scientific Reports in which he published that these rare online associations are not the result of being dragged or accumulated by currents, but rather of collective behaviour. Scientists believe that trilobites migrated in groups along the seabed when they were buried and that the way they kept in physical contact could be either through their long antennae, or through pheromones, by means of chemical communication, like today's ants. This specimen is, without a doubt, a piece worthy of study. The Fezouata Formation or Fezouata shale contains extraordinary fossils because the animals were quickly buried by storm deposits made of silt and clay, favourable conditions for the preservation of soft tissues (now pyritized or altered due to a mixture of iron oxides and hydroxides, hence their orange-red colour).
 The fossils belong to two intervals, Tremadocian and Floian, much less rich in fossils.
 Well preserved fossil, cleaned with a hammer and sandblasting, 100% natural.

This piece will travel insured in a safety package to arrive in perfect condition.