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The Tasmanian giant crab is one of the largest crabs in the world, reaching a mass of 17.6 kg (39 lb) and a carapace width of up to 46 cm (18 in). [6] Among crabs, only the Japanese spider crab (Macrocheira kaempferi) can weigh more. [5] Male Tasmanian giant crabs reach more than twice the size of females, [7] which do not exceed 7 kg (15 lb). [6]
Most lophogastridan species are 1–8 centimetres (0.4–3.1 in) long, but Gnathophausia ingens can be up to 35 cm (14 in), probably the largest pelagic crustacean in the world. [1] Some 56 extant species in total are currently known. They are classified into three families and nine genera. [2]
Although most crustaceans are small, their morphology varies greatly and includes both the largest arthropod in the world – the Japanese spider crab with a leg span of 3.7 metres (12 ft) [45] – and the smallest, the 100-micrometre-long (0.004 in) Stygotantulus stocki. [46]
The Registry of World Record Size Shells is a conchological work listing the largest (and in some cases smallest) verified shell specimens of various marine molluscan taxa.A successor to the earlier World Size Records of Robert J. L. Wagner and R. Tucker Abbott, it has been published on a semi-regular basis since 1997, changing ownership and publisher a number of times.
According to Guinness World Records, the heaviest crustacean ever recorded was an American lobster caught off Nova Scotia, Canada, weighing 20.1 kg (44.4 lb). [ 13 ] [ 14 ] The closest relative of H. americanus is the European lobster, Homarus gammarus .
The Tasmanian giant freshwater crayfish (Astacopsis gouldi), also called Tasmanian giant freshwater lobster, is the largest freshwater invertebrate and the largest freshwater crayfish species in the world. The species is only found in the rivers below 400 metres (1,300 ft) above sea level in northern Tasmania, an island-state of Australia.
This is a list of the largest rodents. Rank Common name Scientific name Status Maximum body mass [kg (lb)] Image Notes 1: Giant pacarana: Josephoartigasia monesi:
B. latro is both the largest living terrestrial arthropod and the largest living terrestrial invertebrate. [ 12 ] [ 13 ] Reports of its size vary, but most sources give a body length up to 40 cm (16 in), [ 14 ] a weight up to 4.1 kg (9 lb), and a leg span more than 0.91 m (3 ft), [ 15 ] with males generally being larger than females. [ 16 ]