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After an analysis of new fossil material, the subgenera were elevated to the rank of genus, and three new genera were erected. [3] Most of the family's current diversity is found in temperate waters of the Northern Hemisphere .
Blue crab escaping from the net along the Core Banks of North Carolina.. Callinectes sapidus (from the Ancient Greek κάλλος,"beautiful" + nectes, "swimmer", and Latin sapidus, "savory"), the blue crab, Atlantic blue crab, or, regionally, the Maryland blue crab, is a species of crab native to the waters of the western Atlantic Ocean and the Gulf of Mexico, and introduced internationally.
The order is estimated to contain nearly 15,000 extant species in around 2,700 genera, with around 3,300 fossil species. [1] Nearly half of these species are crabs, with the shrimp (about 3,000 species) and Anomura including hermit crabs , king crabs , porcelain crabs , squat lobsters (about 2500 species) making up the bulk of the remainder. [ 1 ]
Chesapeake blue crab: western Atlantic Ocean and the Gulf of Mexico Callinectes similis Williams, 1966: lesser blue crab or dwarf crab: Western Atlantic Ocean, Caribbean Sea and Gulf of Mexico from the United States to Colombia. Callinectes toxotes Ordway, 1863: Eastern Pacific
Potamonautes lirrangensis, the Malawi blue crab, [2] is a species of freshwater crab in the family Potamonautidae. This common and widespread species is found in Lake Malawi , Lake Kivu , the upper Congo River Basin and Malagarasi River in the Democratic Republic of the Congo , Malawi , Rwanda , and Tanzania . [ 1 ]
Dakoticancroidea is a superfamily of fossil crabs divided into the following two families: [1] [2] [3] † Dakoticancridae Rathbun, 1917 † Avitelmessus Rathbun, 1923 † Dakoticancer Rathbun, 1917 † Tetracarcinus Weller, 1905 † Ibericancridae Artal, Guinot, Van Bakel & Castillo, 2008 † Ibericancer Artal, Guinot, Van Bakel & Castillo, 2008
Portunus pelagicus, also known as the blue crab, blue swimmer crab, blue manna crab and flower crab is a species of large crab found in the Indo-Pacific, including off the coasts Indonesia, [1] Malaysia, [2] Cambodia, [3] Thailand, [4] the Philippines, [5] and Vietnam; [6] and in the intertidal estuaries around most of Australia and east to New Caledonia.
There are 25 types of trace fossils of horseshoe crab, brachiopods, trilobites and pawless armor-plated fish that lived 450 million years ago in a lagoon. The fossils are set in rock of Harding Formation. [2] It is considered North America's best site of trace fossils because it shows the movement of the ancient animals. [1]