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Cancrinos
''Cancrinos'' is a genus of fossil crustacean closely allied with the slipper lobsters. One species is known, ''C. claviger'' from the Jurassic of southern Germany. Taxonomy Fossils of ''Cancrinos'' are rare, and their state of preservation is often imperfect. Count Georg zu Münster first described ''Cancrinos'' in 1839, based on material from the Upper Jurassic Solnhofen limestones of southern Germany. He described two species, ''Cancrinos claviger'' and ''C. latipes'', differentiated by the size of the second antennae, but the two are now considered to be synonyms. Further specimens have been discovered in Upper Cretaceous lithographic limestones of Lebanon, and described as a new species, ''C. libanensis''; however, Haug ''et al.'' (2016) made it the type species of a separate genus '' Paracancrinos''. Classification Although Münster was unable to discern any living relatives of ''Cancrinos'' during his original description, Reinhard Förster proposed in 1984 that ''Can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paracancrinos
''Paracancrinos'' is a prehistoric genus of crustacean that lived during the Upper Cretaceous in what is now Lebanon. It contains a single species, ''P. libanensis'', which was originally described as a species of ''Cancrinos ''Cancrinos'' is a genus of fossil crustacean closely allied with the slipper lobsters. One species is known, ''C. claviger'' from the Jurassic of southern Germany. Taxonomy Fossils of ''Cancrinos'' are rare, and their state of preservation is ...'' in 2006, but was moved to its own genus in 2016.{{cite journal , last1=Haug , first1=Joachim T. , last2=Audo , first2=Denis , last3=Charbonnier , first3=Sylvain , last4=Palero , first4=Ferran , last5=Petit , first5=Gilles , last6=Abi Saad , first6=Pierre , last7=Haug , first7=Carolin , title=The evolution of a key character, or how to evolve a slipper lobster , journal=Arthropod Structure & Development , date=2016 , volume=45 , issue=2 , pages=97–107 , doi=10.1016/j.asd.2015.08.003, pmid=26319267 , url=htt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slipper Lobster
Slipper lobsters are a family (Scyllaridae) of about 90 species of achelate crustaceans, in the Decapoda clade Reptantia, found in all warm oceans and seas. They are not true lobsters, but are more closely related to spiny lobsters and furry lobsters. Slipper lobsters are instantly recognisable by their enlarged antennae, which project forward from the head as wide plates. All the species of slipper lobsters are edible, and some, such as the Moreton Bay bug and the Balmain bug (''Ibacus peronii'') are of commercial importance. Description Slipper lobsters have six segments in their heads and eight segments in the thorax, which are collectively covered in a thick carapace. The six segments of the abdomen each bear a pair of pleopods, while the thoracic appendages are either walking legs or maxillipeds. The head segments bear various mouthparts and two pairs of antennae. The first antennae, or ''antennules'', are held on a long flexible stalk, and are used for sensing the env ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achelata
The Achelata is an infra-order of the decapod crustaceans, holding the spiny lobsters, slipper lobsters and their fossil relatives. Description The name "Achelata" derives from the fact that all the members of this group lack the chelae (claws) that are found on almost all other decapods (from the Ancient Greek , = "not", , = "claw"). They are further united by the great enlargement of the second antennae, by the special "phyllosoma" form of the larva, and by a number of other characters. Classification and fossil record The infraorder Achelata belongs to the group Reptantia, which consists of the walking/crawling decapods (lobsters and crabs). The cladogram below shows Achelata's placement within the larger order Decapoda, from analysis by Wolfe ''et al.'', 2019. Achelata contains the spiny lobsters (Palinuridae), the slipper lobsters (Scyllaridae) and the furry lobsters (Synaxidae, now usually included in Palinuridae), as well as two extinct families, Cancrinidae a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithographic Limestone
Lithographic limestone is hard limestone that is sufficiently fine-grained, homogeneous and defect free to be used for lithography. Geologists use the term "lithographic texture" to refer to a grain size under 1/250 mm. The term "sublithographic" is sometimes used for homogeneous fine-grained limestone with a somewhat coarser texture. Origin The generally accepted theory for the origin of lithographic and sublithographic limestones is that they were formed in shallow, Stagnant water, stagnant, Hypersaline lake, hypersaline, and Anoxic waters, anoxic lagoons. The combination of mild hypersalinity and low oxygen content is believed to have inhibited the formation of microbial mats and prevented the invasion of bottom dwelling organisms. Microbial mats and bottom dwelling organisms would have left fossils, and bottom dwelling organisms would have churned the accumulating sediment, producing a less homogeneous rock. Stagnancy was required to avoid churning or sculpting of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puerulus
Crustaceans may pass through a number of larval and immature stages between hatching from their eggs and reaching their adult form. Each of the stages is separated by a moult, in which the hard exoskeleton is shed to allow the animal to grow. The larvae of crustaceans often bear little resemblance to the adult, and there are still cases where it is not known what larvae will grow into what adults. This is especially true of crustaceans which live as benthic adults (on the sea bed), more-so than where the larvae are planktonic, and thereby easily caught. Many crustacean larvae were not immediately recognised as larvae when they were discovered, and were described as new genera and species. The names of these genera have become generalised to cover specific larval stages across wide groups of crustaceans, such as ''zoea'' and ''nauplius''. Other terms described forms which are only found in particular groups, such as the ''glaucothoe'' of hermit crabs, or the ''phyllosoma'' of slippe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ontogeny
Ontogeny (also ontogenesis) is the origination and development of an organism (both physical and psychological, e.g., moral development), usually from the time of fertilization of the egg to adult. The term can also be used to refer to the study of the entirety of an organism's lifespan. Ontogeny is the developmental history of an organism within its own lifetime, as distinct from phylogeny, which refers to the evolutionary history of a species. Another way to think of ontogeny is that it is the process of an organism going through all of the developmental stages over its lifetime. The developmental history includes all the developmental events that occur during the existence of an organism, beginning with the changes in the egg at the time of fertilization and events from the time of birth or hatching and afterward (i.e., growth, remolding of body shape, development of secondary sexual characteristics, etc.). While developmental (i.e., ontogenetic) processes can influence sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plesiomorphy
In phylogenetics, a plesiomorphy ("near form") and symplesiomorphy are synonyms for an ancestral character shared by all members of a clade, which does not distinguish the clade from other clades. Plesiomorphy, symplesiomorphy, apomorphy, and synapomorphy, all mean a trait shared between species because they share an ancestral species. Apomorphic and synapomorphic characteristics convey much information about evolutionary clades and can be used to define taxa. However, plesiomorphic and symplesiomorphic characteristics cannot. The term ''symplesiomorphy'' was introduced in 1950 by German entomologist Willi Hennig. Examples A backbone is a plesiomorphic trait shared by birds and mammals, and does not help in placing an animal in one or the other of these two clades. Birds and mammals share this trait because both clades are descended from the same far distant ancestor. Other clades, e.g. snakes, lizards, turtles, fish, frogs, all have backbones and none are either birds n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swiss Journal Of Geoscience
Swiss may refer to: * the adjectival form of Switzerland * Swiss people Places * Swiss, Missouri * Swiss, North Carolina *Swiss, West Virginia * Swiss, Wisconsin Other uses *Swiss-system tournament, in various games and sports *Swiss International Air Lines ** Swiss Global Air Lines, a subsidiary * Swissair, former national air line of Switzerland *.swiss alternative TLD for Switzerland See also * Swiss made, label for Swiss products * Swiss cheese (other) * Switzerland (other) *Languages of Switzerland, none of which are called "Swiss" *International Typographic Style, also known as Swiss Style, in graphic design *Schweizer (other), meaning Swiss in German *Schweitzer, a family name meaning Swiss in German *Swisse Swisse is a vitamin, supplement, and skincare brand. Founded in Australia in 1969 and globally headquartered in Melbourne, and was sold to Health & Happiness, a Chinese company based in Hong Kong previously known as Biostime Internatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palinurus Elephas
''Palinurus elephas'' is a commonly caught species of spiny lobster from the East Atlantic Ocean and the Mediterranean Sea. Its common names include European spiny lobster, crayfish or cray (in Ireland), crawfish (in England), common spiny lobster, Mediterranean lobster and red lobster. Distribution and habitat ''Palinurus elephas'' is a common species of spiny lobster, found in the eastern Atlantic Ocean, from southern Norway to Morocco and the Azores, and in the Mediterranean Sea, except its eastern extremes. It lives on rocky exposed coasts below the intertidal zone, mainly at depths of . It is named after the ancient Roman Tyrrhenian sea port of Palinurus (modern day Palinuro, Campania, Italy) where they are found in abundance off its promontory. Description ''P. elephas'' may reach up to long, although rarely longer than , and usually . Few achieve their maximum weight of several kilograms. The adults are reddish-brown with yellow spots. The carapace is slightly compr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scyllarides Latus
''Scyllarides latus'', the Mediterranean slipper lobster, is a species of slipper lobster found in the Mediterranean Sea and in the eastern Atlantic Ocean. It is edible and highly regarded as food, but is now rare over much of its range due to overfishing. Adults may grow to long, are camouflaged, and have no claws. They are nocturnal, emerging from caves and other shelters during the night to feed on molluscs. As well as being eaten by humans, ''S. latus'' is also preyed upon by a variety of bony fish. Its closest relative is '' S. herklotsii'', which occurs off the Atlantic coast of West Africa; other species of ''Scyllarides'' occur in the western Atlantic Ocean and the Indo-Pacific. The larvae and young animals are largely unknown. Distribution ''Scyllarus latus'' is found along most of the coast of the Mediterranean Sea (one exception being the northern Adriatic Sea), and in parts of the eastern Atlantic Ocean from near Lisbon in Portugal south to Senegal, includi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
