A recent study shows that marine oxygen levels were crucial to the evolution of early Paleozoic trilobite body size, ...

the labrum has long been hypothesized to exist in trilobites, but never observed in fossils. This discovery now helps us ...

Learners will understand that living things have changed over time based on fossil evidence. 1. Download the PowerPoint presentation (PPT 5.9 MB) above. Using the first slide, introduce trilobites and ...

Indeed, researchers are coming to realize that the term “living fossil” is a misnomer. One by one, the classic examples—horseshoe crabs, coelacanths, cycads, and more—have turned out to be very ...

Fortey’s detailed fieldwork on trilobite ecology showed that those living in relatively shallow ... This insight enabled him to use trilobites and other fossils to constrain the position of ...

The Pennsylvania State fossil is currently a type of trilobite called Phacops rana. Phacops rana is a marine arthropod from the Paleozoic era. According to the Commonwealth of Pennsylvania ...