Arthropod appendages are specialized for diverse roles including feeding, walking, and mating. Fossils from the Cambrian period (539 to 487 million years...
Based on multiple analytical techniques applied to well-preserved soft-bodied specimens of two trilobite species, the Late Ordovician species Triarthrus...
Trilobites had well-developed gill-like structures in their upper leg branches, according to a new imaging study led by the University of California, Riverside.
Trilobite...
