1908 Paralomis spinosissima Birstein & Vinogradov, 1972 Paralomis staplesi Ahyong, 2010 Paralomis stella Macpherson, 1988 Paralomis stevensi Ahyong & Dawson, 2006 Paralomis taylorae Ahyong, 2010 Paralomis truncatispinosa Takeda & Miyake, 1980 Paralomis tuberipes Macpherson, 1988 Paralomis verrilli (Benedict, 1895) Paralomis webberi Ahyong, 2010 Paralomis zealandica Dawson & Yaldwyn, 1971 Phyllolithodes Brandt, 1848 Phyllolithodes papillosus Brandt, 1848 – flatspine triangle crab, heart crab Rhinolithodes Brandt, 1848 Rhinolithodes wosnessenskii Brandt, 1848 – rhinoceros crab Sculptolithodes Makarov, 1934 Sculptolithodes derjugini Makarov, 1934 Glyptolithodes Glyptolithodes is found chiefly in the Southern Hemisphere, but extending as far north as California, although all its closest relatives live in the Northern Hemisphere. Its single species, G. cristatipes, was originally placed in the genus Rhinolithodes. Paralithodes Red (P. camtschaticus) and blue (P. platypus) king crabs are some of the most important fisheries in Alaska. However, populations have fluctuated in the past 25 years, and some areas are currently closed due to overfishing. The two species are similar in size, shape and life history. Habitat is the main factor separating the range of blue and red king crabs in the Bering Sea. Red king crabs prefer shallow, muddy or sandy habitats in Bristol Bay and Norton Sound, while blue king crabs prefer the deeper areas made up of cobble, gravel and rock that occur around the Pribilof, St. Matthew, St. Lawrence, and Diomede Islands. Red king crabs have an 11-month brood cycle in their first reproductive year and a 12-month cycle thereafter. Both red and blue king crabs have planktotrophic larvae that undergo 4 zoeal stages in the water column and a non-feeding intermediate glaucothoe stage which seeks appropriate habitat on the sea floor. Paralithodes camtschaticus The red king crab, Paralithodes camtschaticus, is a very large species, sometimes reaching a carapace width of 11 in (28 cm) and a leg span of 6 ft (1.8 m). Its natural range is the Bering Sea around the Kamchatka Peninsula area, between the Aleutian Islands and St. Lawrence Island. It can also be found in the Barents Sea and the European Arctic, where it was intentionally introduced and has now become a pest. By 2022 they had spread to the North Sea, becoming both a lucrative new stock to British fisheries, and an invasive species. Paralithodes platypus The blue king crab, Paralithodes platypus, lives near St. Matthew Island, the Pribilof Islands, and the Diomede Islands, Alaska, and there are populations along the