Aratus pisonii, commonly known as the mangrove tree crab, is a species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of crab

Crab

True crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" , or where the reduced abdomen is entirely hidden under the thorax...

 which lives in mangrove

Mangrove

Mangroves are various kinds of trees up to medium height and shrubs that grow in saline coastal sediment habitats in the tropics and subtropics – mainly between latitudes N and S...

 trees in tropical and subtropical parts of the Americas, from Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

 to Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

 on the Atlantic

Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

 coast, and from Nicaragua

Nicaragua

Nicaragua is the largest country in the Central American American isthmus, bordered by Honduras to the north and Costa Rica to the south. The country is situated between 11 and 14 degrees north of the Equator in the Northern Hemisphere, which places it entirely within the tropics. The Pacific Ocean...

 to Peru

Peru

Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

 on the Pacific

Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

 coast. It feeds mostly on the leaves of the mangroves, but is an omnivore

Omnivore

Omnivores are species that eat both plants and animals as their primary food source...

, and prefers animal matter when possible. A. pisonii is the only species in the monotypic genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 Aratus. The specific epithet pisonii commemorates the Dutch naturalist Willem Piso

Willem Piso

Willem Piso was a Dutch physician and naturalist who participated as an expedition doctor in Dutch Brazil from 1637 - 1644, sponsored by Earl Johan Maurits van Nassau-Siegen and the Dutch West India Company...

 who travelled in Brazil in 1638 with Georg Marggraf

Georg Marcgrave

Georg Marcgrave was a German naturalist and astronomer.- Life :Born in Liebstadt in the Electorate of Saxony, Marcgrave studied botany, astronomy, mathematics, and medicine in Germany and Switzerland until 1636 when he journeyed to Leiden in the Netherlands.In 1637, he was appointed astronomer of...

.