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Giant isopods have been recorded in the West Atlantic from the US state of Georgia to Brazil, including the Gulf of Mexico and the Caribbean. [1] The four known Atlantic species are B. obtusus, B. miyarei, B. maxeyorum, and B. giganteus, and the last of these is the only species recorded off the United States.
Porcellio hoffmannseggii is considered to be one of the largest terrestrial isopod species, with adults able to grow to be over 1.5 inches (3.8 cm) long. They are typically dark grey or black, with a thin white skirt around the edge of their body. Males of this species have longer uropods than females.
It is a member of the giant isopods (Bathynomus), and as such it is related—albeit distantly—to shrimps and crabs. [2] It was the first Bathynomus species ever documented and was described in 1879 by French zoologist Alphonse Milne Edwards after the isopod was found in fishermen's nets off the coast of the Dry Tortugas in the Gulf of Mexico .
Amphipods, isopods, and allies Giant isopod The largest species is the giant isopod (Bathynomus pergiganteus), which can reach a length of 45 cm (18 inches) and a weight of 1.7 kg (3.7 lb). [272] Remipedes The largest of these cave-dwelling crustaceans is the species Godzillius robustus, at up to 4.5 cm (1.8 in). [273]
B. brucei is the largest 'giant' member of Bathynomus, a specimen collected 400 metres below sea level measuring 154 mm (6.1 in) long. [1] Members of the larger 'supergiant' group of Bathynomus species such as B. giganteus and B. kensleyi are known to grow to lengths of almost 20 in (510 mm).
The largest isopod is in the genus Bathynomus and some large species are fished commercially for human food in Mexico, Japan and Hawaii. [15] Some isopod groups have evolved a parasitic lifestyle, particularly as external parasites of fish. [9] They can damage or kill their hosts and can cause significant economic loss to commercial fisheries. [16]
Antrolana lira, also known as The Madison Cave isopod, is a freshwater, cave-dwelling crustacean species. It is in the family Cirolanidae and it is the only species of its genus Antrolana . This isopod can be found in flooded limestone caves and karst aquifers throughout the Great Appalachian Valley of Virginia and West Virginia . [ 3 ]
Porcellio dilatatus (Commonly known as the Giant canyon isopod) is a species of woodlouse in the genus Porcellio belonging to the family Porcellionidae. This species is widespread in Europe, [1] and has also been introduced to North America from Western Europe. [2] They are 15 millimetres (0.59 in) long, are brown coloured and striped. [3]