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Squat Lobster
Squat lobsters are dorsoventrally flattened crustaceans with long tails held curled beneath the cephalothorax. They are found in the two superfamilies Galatheoidea and Chirostyloidea, which form part of the decapod infraorder Anomura, alongside groups including the hermit crabs and mole crabs. They are distributed worldwide in the oceans, and occur from near the surface to deep sea hydrothermal vents, with one species occupying caves above sea level. More than 900 species have been described, in around 60 genera. Some species form dense aggregations, either on the sea floor or in the water column, and a small number are commercially fished. Description The two main groups of squat lobsters share most features of their morphology. They resemble true lobsters in some ways, but are somewhat flattened dorsoventrally, and are typically smaller. Squat lobsters vary in carapace length (measured from the eye socket to the rear edge), from in the case of ''Munidopsis aries'', down to o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Munidopsis Serricornis
''Munidopsis serricornis'' is a species of squat lobster. It is widely distributed in the world's oceans, being found in the eastern Atlantic Ocean (from Iceland and Norway to the Cape Verde Islands), the western Atlantic Ocean (from the United States to the Gulf of Mexico), and the Indo-Pacific (from Australia and the Malay Archipelago to Madagascar). It grows up to a carapace length of . ''M. serricornis'' appears to be one of the most abundant megafauna species in the cold water coral reefs of southern Norway. It has also been observed in association with the gorgonian ''Acanthogorgia''. ''M. serricornis'' was the first species of the current genus ''Munidopsis'' to be described, when Sven Lovén Sven (in Danish and Norwegian, also Svend and also in Norwegian most commonly Svein) is a Scandinavian first name which is also used in the Low Countries and German-speaking countries. The name itself is Old Norse for "young man" or "young warr ... described it (as ''Galathea s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Column
A water column is a conceptual column of water from the surface of a sea, river or lake to the bottom sediment.Munson, B.H., Axler, R., Hagley C., Host G., Merrick G., Richards C. (2004).Glossary. ''Water on the Web''. University of Minnesota-Duluth. Retrieved 27 May 2014. Descriptively, the deep sea water column is divided into five parts—'' pelagic zones'' (from Greek πέλαγος (pélagos), 'open sea')—from the surface to below the floor, as follows: ''epipelagic'', from the surface to 200 meters below the surface; ''mesopelagic'', from 200 to 1000 meters below the surface; '' bathypelagic'', from 1000 to 4000 meters below the surface; ''abyssopelagic'', from 4000 meters below the surface to the level sea floor; ''hadopelagic'', depressions and crevices below the level sea floor. The concept of water column is useful since many aquatic phenomena are explained by the incomplete vertical mixing of waters with discrete chemical, physical or biological characteristics. Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maxilla (arthropod Mouthpart)
In arthropods, the maxillae (singular maxilla) are paired structures present on the head as mouthparts in members of the clade Mandibulata, used for tasting and manipulating food. Embryologically, the maxillae are derived from the 4th and 5th segment of the head and the maxillary palps; segmented appendages extending from the base of the maxilla represent the former leg of those respective segments. In most cases, two pairs of maxillae are present and in different arthropod groups the two pairs of maxillae have been variously modified. In crustaceans, the first pair are called maxillulae (singular maxillula). Modified coxae at the base of the pedipalps in spiders are also called "maxillae", although they are not homologous with mandibulate maxillae. Myriapoda Millipedes In millipedes, the second maxillae have been lost, reducing the mouthparts to only the first maxillae which have fused together to form a gnathochilarium, acting as a lower lip to the buccal cavity and the man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mandible (arthropod Mouthpart)
image:Bullant head detail.jpg, 250px, The mandibles of a bull ant The mandible (from la, mandibula or mandĭbŭ-lum, a jaw) of an arthropod is a pair of Arthropod mouthparts, mouthparts used either for biting or cutting and holding food. Mandibles are often simply called jaws. Mandibles are present in the extant subphylum, subphyla Myriapoda (millipedes and others), Crustacean, Crustacea and Hexapoda (insects etc.). These groups make up the clade Mandibulata, which is currently believed to be the sister group to the rest of arthropods, the clade Arachnomorpha (Chelicerata and Trilobite, Trilobita). Unlike the chelicerae of arachnids, mandibles can often be used to chew food. Mandibulates also differ by having Antenna (biology), antennae, and also by having three distinct body regions: head, thorax and abdomen. (The cephalothorax (or prosoma) of chelicerates is a fusion of head and thorax.) Insects Insect mandibles are as diverse in form as their food. For instance, grass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antenna (biology)
Antennae ( antenna), sometimes referred to as "feelers", are paired appendages used for sensing in arthropods. Antennae are connected to the first one or two segments of the arthropod head. They vary widely in form but are always made of one or more jointed segments. While they are typically sensory organs, the exact nature of what they sense and how they sense it is not the same in all groups. Functions may variously include sensing touch, air motion, heat, vibration (sound), and especially smell or taste. Antennae are sometimes modified for other purposes, such as mating, brooding, swimming, and even anchoring the arthropod to a substrate. Larval arthropods have antennae that differ from those of the adult. Many crustaceans, for example, have free-swimming larvae that use their antennae for swimming. Antennae can also locate other group members if the insect lives in a group, like the ant. The common ancestor of all arthropods likely had one pair of uniramous (unbranched ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kiwa Puravida
''Kiwa puravida'' is a species of deep-sea dwelling decapod, a member of the genus '' Kiwa'', a genus of animals sometimes informally known as "yeti crabs". The crabs live at deep-sea cold seeps where they feed on symbiotic Pseudomonadota, which they cultivate on hair-like projections on their claws. The bacteria metabolise hydrogen sulfide and methane produced by the seeps, and are harvested by the animals' comb-like mouthparts. Among the other deep-sea animals that make use of such symbionts this species is unique in that it actively waves its appendages over the vents in order to provide the bacteria with more oxygen and nutrients. ''Kiwa puravida'' was discovered living on the deep sea bottom off the coast of Costa Rica in 2006 by Andrew Thurber, William J. Jones and Kareen Schnabel. The only other members of its family, '' Kiwa hirsuta'', and the Hoff crab, or '' Kiwa tyleri'', are crabs with similarly hairy claws. ''Kiwa hirsuta'' was discovered in 2005 near Easter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleon
The decapod ( crustaceans such as a crab, lobster, shrimp or prawn) is made up of 20 body segments grouped into two main body parts: the cephalothorax and the pleon (abdomen). Each segment may possess one pair of appendages, although in various groups these may be reduced or missing. They are, from head to tail: Cephalothorax Head # antennules # antennae #mandibles # first maxillae # second maxillae The head also bears the (usually stalked) compound eyes. The distal portion of a mandible or maxilla which has a sensory function is known as a palp. Thorax / pereon #first maxillipeds #second maxillipeds #third maxillipeds #first pereiopods #second pereiopods #third pereiopods #fourth pereiopods #fifth pereiopods Maxillipeds are appendages modified to function as mouthparts. Particularly in the less advanced decapods, these can be very similar to the pereiopods. Pereiopods are primarily walking legs and are also used for gathering food. They are also the ten legs from which decapod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uroptychus
''Uroptychus'' is a genus of squat lobsters in the family Chirostylidae found across the Indo-Pacific The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the .... The genus ''Uroptychus'' contains the following species: *''Uroptychus acostalis'' Baba, 1988 *''Uroptychus aguayoi'' Chace, 1939 *''Uroptychus alcocki'' Ahyong & Poore, 2004 *''Uroptychus alius'' Baba, 2005 *''Uroptychus altus'' Baba, 2005 *''Uroptychus amabilis'' Baba, 1979 *'' Uroptychus anacaena'' Baba & Lin, 2008 *'' Uroptychus anatonus'' Baba & Lin, 2008 *''Uroptychus armatus'' (A. Milne-Edwards, 1880) *''Uroptychus atlanticus'' Baba & Wicksten, 2017 *''Uroptychus australis'' (Henderson, 1885) *''Uroptychus babai'' Ahyong & Poore, 2004 *''Uroptychus bacillimanus'' Alcock & Anderson, 1899 *''Uroptychus bellus'' Faxon, 1893 * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galathea Intermedia
''Galathea intermedia'' is a species of squat lobster found in the north-eastern Atlantic Ocean, as far north as Troms, Norway, south to Dakar and the Mediterranean Sea. ''G. intermedia'' is the smallest species of squat lobster in the North Sea, at a length of only , and a carapace length of . The whole body is red, with a beige stripe along the back, onto the narrow rostrum. The limbs are semitransparent, and the animal bears several "neon blue" spots on the front of the body that may serve in species recognition Intra-species recognition is the recognition by a member of a species of a conspecific (another member of the same species). In many species, such recognition is necessary for procreation. Different species may employ different methods, but all .... References Squat lobsters Crustaceans of the Atlantic Ocean Crustaceans described in 1851 {{squat-lobster-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Munidopsis Aries
''Munidopsis'' is a genus of squat lobster. It is the second largest of all the genera of squat lobsters, after ''Munida'', with over 200 species. Its members are mainly found on continental slopes and on abyssal plains. A few fossil species are also known, including specimens from the Campanian (Cretaceous). Species The described living species are as follows: *''Munidopsis abbreviata'' (A. Milne-Edwards, 1880) *''Munidopsis abdominalis'' (A. Milne-Edwards, 1880) *'' Munidopsis abyssicola'' Baba, 2005 *'' Munidopsis abyssorum'' A. Milne-Edwards & Bouvier, 1897 *'' Munidopsis acalipha'' Macpherson, 2007 *''Munidopsis acuminata'' Benedict, 1902 *''Munidopsis acuta'' (A. Milne-Edwards, 1881) *''Munidopsis acutispina'' Benedict, 1902 *''Munidopsis africana'' Balss, 1913 *''Munidopsis agassizii'' Faxon, 1893 *''Munidopsis alaminos'' Pequegnat & Pequegnat, 1970 *''Munidopsis albatrossae'' Pequegnat & Pequegnat, 1973 *''Munidopsis allae'' Khodkina & Duris, 1989 *''Munidopsis alvisca'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carapace
A carapace is a Dorsum (biology), dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tortoises, the underside is called the plastron. Crustaceans In crustaceans, the carapace functions as a protective cover over the cephalothorax (i.e., the fused head and thorax, as distinct from the abdomen behind). Where it projects forward beyond the eyes, this projection is called a rostrum (anatomy), rostrum. The carapace is Calcification, calcified to varying degrees in different crustaceans. Zooplankton within the phylum Crustacea also have a carapace. These include Cladocera, ostracods, and Isopoda, isopods, but isopods only have a developed "cephalic shield" carapace covering the head. Arachnids In arachnids, the carapace is formed by the fusion of prosomal tergites into a single Plate (animal anatomy), plate which carries the e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
