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Gaster (insect Anatomy)
The gaster () is the bulbous posterior portion of the metasoma found in hymenopterans of the suborder Apocrita (bees, wasps and ants). This begins with abdomen, abdominal segment III on most ants, but some make a constricted Petiole (insect anatomy) , postpetiole out of segment III, in which case the gaster begins with abdominal segment IV. The gaster in ants contains what is sometimes called the "social stomach," which is named for the fact that food can be carried within it and then shared with other members of the colony. It also contains the ant's heart as well as the rest of their digestive system. In the ant subfamily Formicinae, the gaster houses an acidiphore which they can use to spray formic acid. Certain ants in the genus ''Cataglyphis'', including ''Cataglyphis bicolor'' and ''Cataglyphis fortis'', have a cubiform petiole that allows them to decrease their inertia (and therefore increase their speed) by raising their gaster into an upright position. The ant speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scheme Ant Worker Anatomy-en
Scheme or schemer may refer to: Arts and entertainment * ''The Scheme'', a BBC Scotland documentary TV series * The Scheme (band), an English pop band * ''The Scheme'', an action role-playing video game for the PC-8801, made by Quest Corporation * Schemer (comics), Richard Fisk, a Marvel Comics villain turned antihero * Horace Schemer, a fictional character in the TV series ''Shining Time Station'' * Schemers (film), ''Schemers'' (film), a Scottish film Computing * Scheme (programming language), a minimalist dialect of Lisp * Scheme (URI), the front part of a web link, like "http" or "ftp" * Google Schemer, a former service allowing its users to share plans and interests Other uses * Classification scheme (information science), eg a thesaurus, a taxonomy, a data model or an ontology * Scheme (mathematics), a concept in algebraic geometry * Scheme (rhetoric), a figure of speech that changes a sentence's structure * Scam, an attempt to swindle or cheat people through deception * Sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inertia
Inertia is the natural tendency of objects in motion to stay in motion and objects at rest to stay at rest, unless a force causes the velocity to change. It is one of the fundamental principles in classical physics, and described by Isaac Newton in his Newton%27s_laws_of_motion#First, first law of motion (also known as The Principle of Inertia). It is one of the primary manifestations of mass, one of the core quantitative properties of physical systems. Newton writes: In his 1687 work ''Philosophiæ Naturalis Principia Mathematica'', Newton defined inertia as a property: History and development Early understanding of inertial motion Joseph NeedhamProfessor John H. Lienhard points out the Mozi (book), Mozi – based on a Chinese text from the Warring States period (475–221 BCE) – as having given the first description of inertia. Before the European Renaissance, the prevailing theory of motion in western philosophy was that of Aristotle (384–322 BCE). On the surface ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myrmeconema Neotropicum
''Myrmeconema neotropicum'' is a tetradonematid nematode parasite. It appears to induce fruit mimicry in the tropical ant. Presently the only known host species is ''Cephalotes atratus'', a South American ant with a black abdomen. Upon infection, the gaster, or bulbous hindmost region of the abdomen, resembles one of the many red berries found in tropical forest canopies. Life cycle ''Myrmeconema neotropicum's'' life cycle begins when a bird eats the infected ant. Upon passing through the bird's digestive system the eggs are defecated out. The eggs are then picked up by the ants and fed to their larvae. Once inside the immature ant gut the eggs migrate to the gaster where they will fully mature. Once the ant larvae pupate the mature nematodes begin to reproduce inside of the gaster. The males expire soon after mating but the females hold the eggs within themselves. Once the ant develops into a young adult the gaster begins to become translucent, thus allowing the red embryo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dominican Republic
The Dominican Republic is a country located on the island of Hispaniola in the Greater Antilles of the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean. It shares a Maritime boundary, maritime border with Puerto Rico to the east and a Dominican Republic–Haiti border, land border with Haiti to the west, occupying the Geography of the Dominican Republic, eastern five-eighths of Hispaniola which, along with Saint Martin (island), Saint Martin, is one of only two islands in the Caribbean shared by two sovereign states. In the Antilles, the country is the List of Caribbean islands by area, second-largest nation by area after Cuba at and List of Caribbean countries by population, second-largest by population after Haiti with approximately 11.4 million people in 2024, of whom 3.6 million reside in the Greater Santo Domingo, metropolitan area of Santo Domingo, the capital city. The native Taíno people had inhabited Hispaniola prior to European colonization of the America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetradonematidae
Tetradonematidae is a family of nematodes, most being endoparasites of arthropods. A species discovered in 2008 was found to alter the morphology of its ant host, apparently so as to make the ant resemble fruits leading to their predation by birds. The ants forage on bird droppings and are infected by the nematodes. Some species infect the invasive ant '' Solenopsis invicta'' making them of interest in applied biological control Biological control or biocontrol is a method of controlling pests, whether pest animals such as insects and mites, weeds, or pathogens affecting animals or plants by using other organisms. It relies on predation, parasitism, herbivory, or o .... References Enoplea Nematode families Parasites of arthropods {{Chromadorea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mermithidae
Mermithidae is a family of nematode worms that are endoparasites in arthropods. As early as 1877, Mermithidae was listed as one of nine subdivisions of the Nematoidea. Mermithidae are confused with the horsehair worms of the phylum Nematomorpha that have a similar life history and appearance. Mermithids are parasites, mainly of arthropods. Most are known from insects, but some are recorded from spiders, scorpions and crustaceans. A few are known to parasitize earthworms, leeches and molluscs, and a specimen is known from a spider preserved in Baltic amber. At least 25 species are known to parasitize mosquito larvae, making them of considerable interest in biological control. A species, probably ''Pheromermis vesparum'', was recorded from the invasive Vespa velutina, Asian hornet (''Vespa velutina'') in France. The parasite was considered to be a member of the local fauna which had adapted to a new host (biology), host. However, the authors concluded that the mermithid could not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nematode
The nematodes ( or ; ; ), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic. Parasitic worms (helminths) are the cause of soil-transmitted helminthiases. They are classified along with arthropods, tardigrades and other moulting animals in the clade Ecdysozoa. Unlike the flatworms, nematodes have a tubular digestive system, with openings at both ends. Like tardigrades, they have a reduced number of Hox genes, but their sister phylum Nematomorpha has kept the ancestral protostome Hox genotype, which shows that the reduction has occurred within the nematode phylum. Nematode species can be difficult to distinguish from one another. Consequently, estimates of the number of nematode species are uncertain. A 2013 survey of animal biodiversity suggested there are over 25,000. Estimates of the total number of extant species are su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endoparasites
Parasitism is a close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson characterised parasites' way of feeding as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the broomrapes. There are six major parasitic strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), trophicallytransmitted parasitism (by being eaten), vector-transmitted parasitism, parasitoidism, and micropredation. One major axis of classification concerns invasiveness: an endopar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalotes Atratus
''Cephalotes'' is a genus (biology), genus of arboreal, tree-dwelling ant species from the Americas, commonly known as turtle ants. All appear to be gliding ants, with the ability to "parachute" and steer their fall so as to land back on the tree trunk rather than fall to the ground, which is often flooded. Ecological specialization and evolution of a soldier caste One of the most important aspects of the genus' social evolution and adaptation is the manner in which their social organization has been shaped by environmental pressures.Hölldobler, B., Wilson, E. O., & Nelson, M. C. (2009). The superorganism: the beauty, elegance, and strangeness of insect societies. New York: W.W. Norton. This is particularly true of the species ''Cephalotes rohweri'', in which an entire soldier class has evolved as a result of highly specialized nest cavity availability.Powell, S. (2008). Ecological specialization and the evolution of a specialized caste in ''Cephalotes'' ant. Functional Ecology, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cataglyphis Fortis
''Cataglyphis fortis'' is a species of ant in the subfamily Formicinae. Found in Tunisia, the ants inhabit salt pans where they forage dead arthropods. Navigation skills and internal pedometer Measuring the sun's angle This ant ventures far from its burrow in the Sahara Desert, which has almost no identifiable features. While venturing out it periodically takes measurements of its angle in respect to the Sun. By doing this the ant can venture far from its nest in search of food. Because of the blistering heat, it can only do this for about 3–5 minutes/day (the hottest time of the day, when all its predators are in hiding from the sun). When the ant finds a dead insect it then looks at the sun and because of its periodic references to the sun's angle it knows exactly what the shortest route back to the nest is. Researchers from the Max Planck Institute for Chemical Ecology have also verified that desert microhabitats have unique odour signatures that can guide the ants back to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metasoma
The metasoma is the posterior part of the body, or tagma (biology), tagma, of arthropods whose body is composed of three parts, the other two being the prosoma and the mesosoma. In insects, it contains most of the digestive tract, respiratory system, and circulatory system, and the Apical (anatomy), apical segments are typically modified to form genitalia. In a few of the most primitive insects (the Archaeognatha), the metasomal segments bear small, articulated appendages called "styli", which are often considered to be vestigial. There are also pre-apical appendages in most insect orders, called cercus, cerci, which may be multi-segmented and almost resembling a posterior pair of Antenna (biology), antennae; these may be variously modified, or lost entirely. Otherwise, most adult insects lack appendages on the metasoma, though many larval insects (e.g., caterpillars) have some form of appendages, such as prolegs or, in aquatic insects, gills. In apocritan Hymenoptera (wasps, bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cataglyphis Bicolor
''Cataglyphis'' is a genus of ant, desert ants, in the subfamily Formicinae. Its most famous species is ''C. bicolor'', the Sahara Desert ant, which runs on hot sand to find insects that died of heat exhaustion, and can, like other several other ''Cataglyphis'' species, sustain body temperatures up to 50°C. Cataglyphis is also the name of an autonomous rover that won the NASA Sample Return Robot Centennial Challenge inspired by the navigation approaches used by desert ants. Name It was named in 1850, with reference to the impressions of its abdomen: "Von χατά und γλυψίς der Einschnitt. Eine Andeutung auf die vielen Einschnitte oder vielmehr Eindrücke de Hinterleibs." Description Species of this genus are behaviourally, morphologically, and physiologically adapted to dry and hot habitats. Navigational behaviour In the Sahara, ants live where no bushes or clumps of grass are available to protect them, and where tracks are covered by wind-blown sand in seconds. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
