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Homolidae
The family Homolidae, known as carrier crabs or porter crabs, contains 14 genera of marine crabs. They mostly live on the continental slope and continental shelf, and are rarely encountered. Members of the Homolidae have their fifth pereiopods (last pair of walking legs) in a sub-dorsal position, which allows them to hold objects in place over the rear half of the carapace. The objects carried include sponges, black corals and gorgonians, and this behaviour may be a defence mechanism against predators. Some species have been observed carrying living sea urchins in a symbiotic relationship which allows them to benefit from the protection of the urchin's dangerous spikes. Genera A total of 14 genera are currently recognised in the family: *'' Dagnaudus'' Guinot & Richer de Forges, 1995 *'' Gordonopsis'' Guinot & Richer de Forges, 1995 *'' Homola'' Leach, 1816 *'' Homolax'' Alcock, 1899 *'' Homolochunia'' Doflein, 1904 *'' Homologenus'' A. Milne-Edwards, in Henderson, 1888 *'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paromola Cuvieri
''Paromola cuvieri'' is a species of crab in the family Homolidae, the carrier crabs. It occurs in the eastern Atlantic Ocean and the Mediterranean Sea, from Angola to Norway, the Northern Isles and Iceland. It is demersal, occurring at depths of , but it is primarily found deeper than . It prefers areas with mud and emerging rocks, and has been observed in deep-water coral gardens and sponge aggregations. It is locally common. This reddish crab is sexually dimorphic; the males have larger claws and are overall larger than the females. The carapace of the largest males can reach , while their claws can span . Like other members of the family, most ''P. cuvieri'' in their natural habitat carry an object, typically a living sessile invertebrate such as a sponge or deep-water coral, over the carapace in the small hindlegs. This may be used as camouflage, but is also used actively in defense by positioning the object between the crab and a would-be attacker. ''P. cuvieri'' is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paromola
''Paromola'' is a genus of crabs within the family Homolidae. Species * '' Paromola bathyalis'' * '' Paromola crosnieri'' * ''Paromola cuvieri ''Paromola cuvieri'' is a species of crab in the family Homolidae, the carrier crabs. It occurs in the eastern Atlantic Ocean and the Mediterranean Sea, from Angola to Norway, the Northern Isles and Iceland. It is demersal, occurring at depth ...'' * '' Paromola japonica'' * '' Paromola macrochira'' * '' Paromola rathbuni'' * † '' Paromola vetula'' References {{Taxonbar, from=Q4483393 Dromiacea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homola Barbata
''Homola barbata'' is a species of crab in the family Homolidae. Description They usually have squarish carapaces with forward-pointing spines along the upper front edges. The animal's chelipeds are shorter than their other legs (the back pair are short, thin and doubled back on themselves). The animal's carapace grows to long. Ecology ''Homola barbata'' inhabits shelly, sandy, and muddy seabeds at depths of . They feed on algae, small mollusks and also scavenge for food. Reproduction is sexual, and through copulation. Distribution In the eastern part of its range, ''Homola barbata'' is found in the Mediterranean Sea and into the North Atlantic. In the western part of its range, ''H. barbata'' is found from Virginia southwards, through the Gulf of Mexico and the West Indies, along the coasts of Central and South America to Rio Grande do Sul, Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in bot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crab
Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the world's oceans, in freshwater, and on land, are generally covered with a thick exoskeleton, and have a single pair of pincers. They first appeared during the Jurassic Period. Description Crabs are generally covered with a thick exoskeleton, composed primarily of highly mineralized chitin, and armed with a pair of chelae (claws). Crabs vary in size from the pea crab, a few millimeters wide, to the Japanese spider crab, with a leg span up to . Several other groups of crustaceans with similar appearances – such as king crabs and porcelain crabs – are not true crabs, but have evolved features similar to true crabs through a process known as carcinisation. Environment Crabs are found in all of the world's oceans, as well as in fresh w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continental Slope
A continental margin is the outer edge of continental crust abutting oceanic crust under coastal waters. It is one of the three major zones of the ocean floor, the other two being deep-ocean basins and mid-ocean ridges. The continental margin consists of three different features: the continental rise, the continental slope, and the continental shelf. The continental shelf is the relatively shallow water area found in proximity to continents. Continental margins constitute about 28% of the oceanic area. Zones of the continental margin The continental shelf is the portion of the continental margin that transitions from the shore out towards to ocean. Continental shelves are believed to make up 7% of the sea floor. The width of continental shelves worldwide varies in the range of 0.03–1500 km. The continental shelf is generally flat, and ends at the shelf break, where there is a drastic increase in slope angle: The mean angle of continental shelves worldwide is 0° 07′, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homola (crab)
Homola (Czech/Slovak feminine: Homolová) is a Czech and Slovak surname. The surname may refer to: * Bedřich Homola (1887–1943), Czech general * Bernard Homola (1894–1975), German film score composer * Craig Homola (born 1958), American ice hockey player * Irena Homola-Skąpska (1929–2017), Polish historian * Jiří Homola (born 1980), Czech footballer * Mária Homolová (born 1987), Slovak gymnast * Matěj Homola (born 1973), Czech musician * Maťo Homola (born 1994), Slovak racing driver See also * * ''Homola barbata ''Homola barbata'' is a species of crab in the family Homolidae. Description They usually have squarish carapaces with forward-pointing spines along the upper front edges. The animal's chelipeds are shorter than their other legs (the back pa ...'', species of crab {{surname Czech-language surnames ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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