Examlex
What characteristic do the organisms in the photos share?
Sepkoski
Refers to Jack Sepkoski, a paleontologist known for his work on the biodiversity and extinction events of marine animal families through geologic time.
Arthropods
Arthropods are a phylum of invertebrate animals with exoskeletons, segmented bodies, and jointed limbs, including insects, arachnids, and crustaceans.
Synapomorphies
Shared derived characters or traits that are used to determine evolutionary relationships among organisms.
Exoskeletons
External skeletons that support and protect an organism's body, found in arthropods like insects, crabs, and lobsters.
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