Trilobite
Digestive tract and diet

The toothless mouth of trilobites was situated on the rear edge of the hypostome (facing backward), in front of the legs attached to the cephalon. The mouth is linked by a small esophagus to the stomach that lay forward of the mouth, below the glabella. The "intestine" led backward from there to the pygidium. The "feeding limbs" attached to the cephalon are thought to have fed food into the mouth, possibly "slicing" the food on the hypostome and/or gnathobases first. Recent propagation phase-contrast synchrotron microtomography, or (PPC-SRμCT), which is a 3d imagining of tissue related to an organism's function, of a sample of Bohemolichas incola show large concentrations of undigestible fragments of Conchoprimitia osekensis, a small-shelled species now extinct, in the B. incola sample digestive tract.

The fragments are indicative of durophagous predation (shell crushing). As the composition of the shells found were not taxonomically significant, rather based on physical properties regarding the shell strength and size, B. incola was opportunistic for food classifying feeding habits to be similar to scavengers. The remains of shells address another digestive aspect of B. incola, in the enzymatic ways in which these indigestible shells were siphoned out of little nutrition leaving only fragments behind. These remnants build on the concept of early Trilobites potentially having glands that secrete enzymes that aid in the digestive process.
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