|
Tunicotheres Moseri
''Tunicotheres'' is a monotypic genus of crabs in the family Pinnotheridae, and ''Tunicotheres moseri'' is the only species in the genus. This crab lives commensally in the atrial chamber of a small ascidian (sea squirt). It is found in the tropical western Atlantic Ocean, the Caribbean Sea and the Gulf of Mexico. Taxonomy In Mary J. Rathbun's original description of this species, she placed it in the then broadly defined '' Pinnotheres''. It remained there for most of the 20th century until Ernesto Campos, while revising the Pinnotheridae, noted that most species with a 2-segmented palp on the third maxilliped were anomalous in ''Pinnotheres''. This led to the segregation of multiple genera, of which ''Tunicotheres'', defined in 1996, was one. Description Members of this family are tiny, soft-bodied crabs commonly known as pea crabs. Males of this species have carapace widths of up to and females of up to . Ecology This crab has been found as an endosymbiont of several spec ... [...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] |
Pinnotheres
''Pinnotheres'' is a genus of crabs, including the pea crab. Many species formerly in ''Pinnotheres'' have been placed in new genera, such as ''Zaops ostreus'' (formerly ''P. ostreus''), the oyster crab and ''Nepinnotheres novaezelandiae'' (formerly ''P.'' ''novaezelandiae)'', the New Zealand pea crab. The species currently recognised in the genus ''Pinnotheres'' are: *''Pinnotheres atrinae'' Sakai, 1939 *'' Pinnotheres atrinicola'' Page, 1983 *'' Pinnotheres bidentatus'' Sakai, 1939 *''Pinnotheres bipunctatus'' Nicolet, 1849 *''Pinnotheres boninensis'' Stimpson, 1858 *'' Pinnotheres borradailei'' Nobili, 1905 *'' Pinnotheres corbiculae'' Sakai, 1939 *'' Pinnotheres coutierei'' Nobili, 1905 *''Pinnotheres cyclinus'' Gordon, 1932 *''Pinnotheres dilatatus'' Shen, 1932 *'' Pinnotheres dofleini'' Lenz, 1914 *'' Pinnotheres edwardsi'' de Man, 1887 *''Pinnotheres excussus'' Dai, Feng, Song & Chen, 1980 *''Pinnotheres globosus'' Hombron & Jacquinot, 1846 *''Pinnotheres gordonae'' Shen, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Territory (animal)
In ethology, territory is the sociographical area that an animal consistently defends against conspecific competition (or, occasionally, against animals of other species) using agonistic behaviors or (less commonly) real physical aggression. Animals that actively defend territories in this way are referred to as being territorial or displaying territorialism. Territoriality is only shown by a minority of species. More commonly, an individual or a group of animals occupies an area that it habitually uses but does not necessarily defend; this is called its home range. The home ranges of different groups of animals often overlap, and in these overlap areas the groups tend to avoid each other rather than seeking to confront and expel each other. Within the home range there may be a ''core area'' that no other individual group uses, but, again, this is as a result of avoidance. Function The ultimate function of animals inhabiting and defending a territory is to increase the indi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Instar
An instar (, from the Latin '' īnstar'', "form", "likeness") is a developmental stage of arthropods, such as insects, between each moult (''ecdysis''), until sexual maturity is reached. Arthropods must shed the exoskeleton in order to grow or assume a new form. Differences between instars can often be seen in altered body proportions, colors, patterns, changes in the number of body segments or head width. After shedding their exoskeleton (moulting), the juvenile arthropods continue in their life cycle until they either pupate or moult again. The instar period of growth is fixed; however, in some insects, like the salvinia stem-borer moth, the number of instars depends on early larval nutrition. Some arthropods can continue to moult after sexual maturity, but the stages between these subsequent moults are generally not called instars. For most insect species, an ''instar'' is the developmental stage of the larval forms of holometabolous (complete metamorphism) or nymphal forms o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polycarpa Spongiabilis
''Polycarpa'' is a genus of ascidian tunicates in the family Styelidae. Species within the genus ''Polycarpa'' include:Sanamyan, K. (2015)''Polycarpa'' Heller, 1877 .In: Shenkar, N.; Gittenberger, A.; Lambert, G.; Rius, M.; Moreira Da Rocha, R.; Swalla, B.J.; Turon, X. (2015) Ascidiacea World Database. Accessed through: World Register of Marine Species on 2015-12-23 * '' Polycarpa aernbaeckae'' Monniot, 1964 * '' Polycarpa albatrossi'' (Van Name, 1912) * '' Polycarpa albopunctata'' (Sluiter, 1904) * '' Polycarpa ambonensis'' (Sluiter, 1904) * '' Polycarpa appropinquata'' (Sluiter, 1898) * '' Polycarpa arenosa'' Monniot & Monniot, 1976 * '' Polycarpa argentata'' (Sluiter, 1890) * '' Polycarpa arnbackae'' Monniot F., 1964 * ''Polycarpa arnoldi'' (Michaelsen, 1914) * '' Polycarpa aspera'' (Herdman, 1886) * '' Polycarpa astromarginata'' Monniot & Monniot, 2003 * '' Polycarpa aurata'' (Quoy & Gaimard, 1834) * '' Polycarpa aurita'' (Sluiter, 1890) * '' Polycarpa beuziti' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molgula Occidentalis
''Molgula occidentalis'' is a species of marine invertebrate of the family Molgulidae. The scientific name of the species was validated and published for the first time in 1883 by Traustedt. ''URMO: UNESCO-IOC Register of Marine Organisms''. Land J. van der (ed), 2008-11-18 It is a soft-bodied, intertidal Ascidiacea, ascidian, sac-like filter feeders in the subphylum tunicate characterized by a hard outer covering known as a “tunic,” abundant in the shallow subtidal and intertidal zones of the Northern Gulf of Mexico, where they establish pseudopopulations. Description These ascidians have soft bodies but are covered by a hard, protective tunic as they are part of the subphylum tunicate. They are sessile intertidal organisms. The tunic contains hair like extensions of the epidermis known as ampullae, which are hollow and tubular. Ampullae grow shortly after the larvae settles in the sediments and are used to form a strong attachment to grains of sand. The grains of sand ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phallusia Nigra
''Phallusia nigra'' is a solitary marine tunicate of the ascidian class found in tropical seas around the world. It usually lives in shallow waters, attached to any hard substrate.Phallusia nigra . Bishop Museum, University of Hawaii. Accessed on 2011-11-23. Like all tunicates, ''P. nigra'' has a thick leathery envelope (''tunic'') containing material. Like all solitary ascidians, the tunic encloses a sac-shaped body with separate water entrance and exit tubes (''siphons''). It lives on that it filters from seawater with a |
Styela Plicata
''Styela plicata'', commonly known as pleated sea squirt, is a species of tunicate in the family Styelidae. This sessile filter feeder can expel water when threatened. Description This invasive species is Florida's largest tunicate. Distribution The range of ''Styela plicata'' has greatly expanded due to its ability to hitch a ride on ships' hulls. Preventative measures include anti-fouling paints, wood preservation, and slime control containing tributyltin Tributyltin (TBT) is an umbrella term for a class of organotin compounds which contain the (C4H9)3 Sn group, with a prominent example being tributyltin oxide. For 40 years TBT was used as a biocide in anti-fouling paint, commonly known as botto .... Habitat This species can live in a wide range of conditions, in waters from 10° to 30°C and salinities between 22%-34% (Thiyagarajan & Qian, 2003) as well as pollution and brackish water. The different life cycle stages of Styela plicata have different habitat requirement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Host (biology)
In biology and medicine, a host is a larger organism that harbours a smaller organism; whether a parasite, parasitic, a mutualism (biology), mutualistic, or a commensalism, commensalist ''guest'' (symbiont). The guest is typically provided with nourishment and shelter. Examples include animals playing host to parasitic worms (e.g. nematodes), cell (biology), cells harbouring pathogenic (disease-causing) viruses, a Fabaceae, bean plant hosting mutualistic (helpful) Rhizobia, nitrogen-fixing bacteria. More specifically in botany, a host plant supplies nutrient, food resources to micropredators, which have an evolutionarily stable strategy, evolutionarily stable relationship with their hosts similar to ectoparasitism. The host range is the collection of hosts that an organism can use as a partner. Symbiosis Symbiosis spans a wide variety of possible relationships between organisms, differing in their permanence and their effects on the two parties. If one of the partners in an ass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbiosis
Symbiosis (from Greek , , "living together", from , , "together", and , bíōsis, "living") is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic. The organisms, each termed a symbiont, must be of different species. In 1879, Heinrich Anton de Bary defined it as "the living together of unlike organisms". The term was subject to a century-long debate about whether it should specifically denote mutualism, as in lichens. Biologists have now abandoned that restriction. Symbiosis can be obligatory, which means that one or more of the symbionts depend on each other for survival, or facultative (optional), when they can generally live independently. Symbiosis is also classified by physical attachment. When symbionts form a single body it is called conjunctive symbiosis, while all other arrangements are called disjunctive symbiosis."symbiosis." Dorland's Illustrated Medical Dictionary. ... [...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] |
.jpg "Click for more on -> Host (biology)")
