Final answer:
The slides provide general information on trilobites rather than a specific genus, with an example of the species Triarthrus eatoni. Trilobites were marine arthropods, notable for their three lobes and contributions to stratigraphy.
Step-by-step explanation:
The question pertains to a specific trilobite genus that is discussed in the example slides. However, the information provided from the slides does not mention a specific genus but rather provides information on trilobites as a class, their diversity and natural history.
Trilobites were a group of extinct marine arthropods that existed from the early Cambrian period about 521 million years ago until their disappearance during a mass extinction at the end of the Permian period, about 250 million years ago. One example provided, Triarthrus eatoni, is a species from the Ordovician period.
Trilobites are notable for their three longitudinal lobes, which gave them their name, and are often used in stratigraphy to help determine the relative ages of rock layers due to their rapid evolution and widespread distribution. Despite their extensive fossil record, no single trilobite species has survived to the modern day.