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Acromyrmex
''Acromyrmex'' is a genus of New World ants of the subfamily Myrmicinae. This genus is found in South America and parts of Central America, México and the Caribbean Islands, and contains 33 known species. Commonly known as " leafcutter ants" they comprise one of the two genera of advanced attines within the tribe Attini, along with '' Atta''. Anatomy ''Acromyrmex'' species' hard outer covering, the exoskeleton or cuticle, functions as armour, protection against dangerous solar waves, an attachment base for internal muscles, and to prevent water loss. It is divided into three main parts; the head, thorax, and abdomen. A small segment between the thorax and abdomen, the petiole, is split into two nodes in ''Acromyrmex'' species. The antennae are the most important sense organs ''Acromyrmex'' species possess, and are jointed so the ant can extend them forward to investigate an object. It can retract them back over its head when in a dangerous situation, for example, a fight ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acromyrmex Balzani Casent0173790 Profile 1
''Acromyrmex'' is a genus of New World ants of the subfamily Myrmicinae. This genus is found in South America and parts of Central America, México and the Caribbean Islands, and contains 33 known species. Commonly known as " leafcutter ants" they comprise one of the two genera of advanced attines within the tribe Attini, along with '' Atta''. Anatomy ''Acromyrmex'' species' hard outer covering, the exoskeleton or cuticle, functions as armour, protection against dangerous solar waves, an attachment base for internal muscles, and to prevent water loss. It is divided into three main parts; the head, thorax, and abdomen. A small segment between the thorax and abdomen, the petiole, is split into two nodes in ''Acromyrmex'' species. The antennae are the most important sense organs ''Acromyrmex'' species possess, and are jointed so the ant can extend them forward to investigate an object. It can retract them back over its head when in a dangerous situation, for example, a fight. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acromyrmex Octospinosus
''Acromyrmex octospinosus'' is a species of New World ants of the subfamily Myrmicinae of the genus ''Acromyrmex''. It is found in the wild naturally in Central America ranging from southern Mexico down to Panama; and across northern South America in Venezuela. Foundresses of the leaf-cutting ant ''Acromyrmex octospinosus'' forage for leaves as garden substrate (semi-claustral foundation). The fungal pellet and substrate usually are attached to rootlets, which are used as a platform for the garden. This arrangement keeps the garden suspended away from the earthen chamber of the underground nest during early colony growth, and it serves to minimize contact between the garden and contaminants. ''A. octospinosus'' foundresses produce from 3 to 7 workers in 2.7 months after founding the nest, but workers do not forage for substrate at this time. Incipient nests died or were abandoned at a monthly rate of about 50%. The ants routinely clean their legs before manipulating the garden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungus-growing Ants
Fungus-growing ants (tribe Attini) comprise all the known fungus-growing ant species participating in ant–fungus mutualism. They are known for cutting grasses and leaves, carrying them to their colonies' nests, and using them to grow fungus on which they later feed. Their farming habits typically have large effects on their surrounding ecosystem. Many species farm large areas surrounding their colonies and leave walking trails that compress the soil, which can no longer grow plants. Attine colonies commonly have millions of individuals, though some species only house a few hundred. They are the sister group to the subtribe Dacetina. Leafcutter ants, including '' Atta'' and '' Acromyrmex'', make up two of the genera. Their cultivars mostly come from the fungal tribe Leucocoprineae of family Agaricaceae. Attine gut microbiota is often not diverse due to their primarily monotonous diets, leaving them at a higher risk than other beings for certain illnesses. They are especia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leafcutter Ants
Leafcutter ants are fungus-growing ants that share the behaviour of cutting leaves which they carry back to their nests to farm fungus. Next to humans, leafcutter ants form some of the largest and most complex animal societies on Earth. In a few years, the central mound of their underground nests can grow to more than across, with smaller radiating mounds extending out to a radius of , taking up and converted into 3.55 m individuals. Leafcutting groups Leafcutter ants are any of at least 55 species of leaf-chewing ants belonging to the three genera '' Atta'', '' Acromyrmex'', and '' Amoimyrmex'', within the tribe Attini. These species of tropical, fungus-growing ants are all endemic to South and Central America, Mexico, and parts of the southern United States.. Leafcutter ants can carry up to 50 times their body weight and cut and process fresh vegetation (leaves, flowers, and grasses) to serve as the nutritional substrate for their fungal cultivates. The leaf cutter an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acromyrmex Hystrix
''Acromyrmex hystrix'' is a species of leaf-cutter ant, a New World ant of the subfamily Myrmicinae of the genus ''Acromyrmex''. Distribution This species can be found in regions including the Amazon and Ecuador. Subspecies *''Acromyrmex hystrix ajax'' Santschi, 1925 *''Acromyrmex hystrix hystrix'' Latreille, 1802 Synonyms * ''Acromyrmex emilii'' Santschi, 1925 * ''Atta hystrix'' Latreille, 1802 * ''Formica hystrix'' Latreille, 1802 See also *List of leafcutter ants This is a list of leafcutter ants, comprising 42 species from two genera: ''Atta (genus), Atta'' and ''Acromyrmex''. References {{reflist Myrmicinae, * Lists of ants ... References {{Taxonbar, from=Q1941253 hystrix Insects described in 1802 Hymenoptera of South America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atta (genus)
''Atta'' is a genus of ants of the Neotropical realm belonging to the ant subfamily Myrmicinae. In English often the species are known as leafcutter ants, though that name is shared with members of the genus '' Acromyrmex''. Workers of ''Atta'' ants gather plant material from the colony's local area, carry the plant parts into the colony's underground chambers, and there fungus grows on it. All the nest's ants feed on that fungus, not the plant material they collect. Leafcutters don't sting, thus inject no venom, although they are known as strong biters. Life Cycle It's unclear how many species the genus ''Atta'' comprises. GBIF lists over 60 -- though many of those name are regarded as "doubtful" -- while the Catalogue of Life lists only 16. As with all ants, ''Atta'' species undergo complete metamorphosis in which each individual ant hatches from an egg as a larva, the larva grows until it forms a pupa, from which later emerges an adult ant. Among adults leafcutter ant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gustav Mayr
Gustav L. Mayr (12 October 1830 – 14 July 1908) was an Austrian Entomology, entomologist and professor in Budapest and Vienna. He specialised in Hymenoptera, being particularly known for his studies of ants.1908. Obituary. Prof. Gustav Mayr. Entomological News 19:396 Bibliography In 1868, he was the first to describe the Argentine ant. He is credited with naming the harvesting ant species, ''Aphaenogaster treatae'', for naturalist Mary Treat, Mary Davis Treat, in honor of her research on the species. edite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myrmicinae
Myrmicinae is a subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zo ... of ants, with about 140 extant genera; their distribution is cosmopolitan. The pupae lack cocoons. Some species retain a functional sting. The petioles of Myrmicinae consist of two nodes. The nests are permanent and in soil, rotting wood, under stones, or in trees.Goulet, H & Huber, JT (eds.) (1993) Hymenoptera of the world: an identification guide to families. Agriculture Canada. p. 224 All species of Cephalotes (within the tribe Attini) are gliding ants. Identification Myrmicine worker ants have a distinct postpetiole, i.e., abdominal segment III is notably smaller than segment IV and set off from it by a well-developed constriction; the pronotum is inflexibly fused to the rest of the meso ... [...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] |
Antenna (biology)
An antenna (plural: antennae) is one of a pair of appendages used for Sensory system, sensing in arthropods. Antennae are sometimes referred to as ''feelers''. Antennae are connected to the first one or two Segmentation (biology), 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 tactition, touch, air motion, heat, vibration (sound), and especially insect olfaction, smell or gustation, taste. Antennae are sometimes modified for other purposes, such as mating, brooding, swimming, and even anchoring the arthropod to a substrate (biology), 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 i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compound Eye
A compound eye is a Eye, visual organ found in arthropods such as insects and crustaceans. It may consist of thousands of ommatidium, ommatidia, which are tiny independent photoreception units that consist of a cornea, lens (anatomy), lens, and photoreceptor cells which distinguish brightness and color. The image perceived by this arthropod eye is a combination of inputs from the numerous ommatidia, which are oriented to point in slightly different directions. Compared with single-aperture eyes, compound eyes have poor image resolution; however, they possess a very large view angle and the ability to detect fast movement and, in some cases, the Polarization (waves), polarization of light. Because a compound eye is made up of a collection of ommatidia, each with its own lens, light will enter each ommatidium instead of using a single entrance point. The individual light receptors behind each lens are then turned on and off due to a series of changes in the light intensity during mov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ommatidia
The compound eyes of arthropods like insects, crustaceans and millipedes are composed of units called ommatidia (: ommatidium). An ommatidium contains a cluster of photoreceptor cells surrounded by support cells and pigment cells. The outer part of the ommatidium is overlaid with a transparent cornea. Each ommatidium is innervated by one axon bundle (usually consisting of 6–9 axons, depending on the number of rhabdomeres) and provides the brain with one picture element. The brain forms an image from these independent picture elements. The number of ommatidia in the eye depends upon the type of arthropod and range from as low as five as in the Antarctic isopod '' Glyptonotus antarcticus'', or a handful in the primitive Zygentoma, to around 30,000 in larger Anisoptera dragonflies and some Sphingidae moths. Description Ommatidia are typically hexagonal in cross-section and approximately ten times longer than wide. The diameter is largest at the surface, tapering toward the inner ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
