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.
No, horseshoe crabs are in a class by themselves; they are more closely related to spiders, scorpions, and ticks. They differ from true crabs in that they have no antennae and no mandibles (mouth parts for grinding food). Like spiders, they have a pair of chelicerae (small appendages for moving food into the mouth).