---

Arachnomorph, Schizoramia subphylum

benthic predator and filter feeder

scavenger, plankton eating swimmer

symbiotic with sulfurophagous bacteria

Trilobite suddenly emerging

from the heat of the Atdabatian seas

narrowing of the glabella and cephalon

hypostome morphological specialization

maintaining high diversity levels

throughout the Silurian period

filling ecological niches, adaptation

decline, divergence and extinction

Enigmatic traces of eye structures

calcite sub-elliptical exoskeleton

articulated transverse segments

fused to the pydigium, shielded head

rostrum to anchor the cranidium

tridents for protection and combat

prosopon adorned with finer domes

tubes as alimentary ridge networks

Single pair of retractible antennae

endopodites attached to the coxa

vision with elongated prism lenses

photoreceptors detecting night and day

Thriving in the Iapetus Ocean

speciation epitome, metazoan paradigm

history marked on its thorax

a three hundred million years reign