The job of the pivot table is to summarize your source data table based on the criteria you specify in the filter fields (Report Filter, Column Labels, and Row Labels). You can think of it as a very advanced way to arrange and filter your data.
The Limulidae are the only recent family of the order Xiphosura, and contain all four living species of horseshoe crabs: 1  Carcinoscorpius rotundicauda, the mangrove horseshoe crab, found in Southeast Asia. 2  Limulus polyphemus, the Atlantic horseshoe crab, found along the American Atlantic coast and in the Gulf of Mexico.
1 Phoronida-This is another phylum that contains worm-like organisms. 2  These are called horseshoe worms, and they are thin organisms that live in chitinous tubes they secrete. 3  Placozoa-Placozoans are simple animals that were discovered in the 1800's in an aquarium in Europe.