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Topic: Holometabolous

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In the News (Wed 21 Aug 19)

  Smallest Eggs
The holometabolous insects, on the other hand, are supposed to have small eggs with little yolk and therefore hatch in an undeveloped form that does not resemble that of their parents (Hinton, 1981).
However, he recognized that data were insufficient for this kind of comparison and instead listed the major axis of the egg as a percentage of the length of body of female from vertex of head to the tip of abdomen.
Based on these data he concluded there is no difference in the size of eggs of hemimetabolous and holometabolous insects, and insects that lay thousands of eggs, like Ephemeroptera and the Tachinidae with microtype eggs, have very small eggs in relation to the size of the female.
ufbir.ifas.ufl.edu /chap07.htm   (798 words)

 Insects - Metamorphosis - A remarkable change
Typical holometabolous insect groups are the Coleoptera (Beetles), Lepidoptera (moths, butterflies and skippers), Hymenoptera (sawflies, wasps, ants and bees) and Diptera (flies).
Holometabolous larvae are larvae that pupate before emerging as adult insects, and include many of the most familiar insects.
Holometabolous larva in general are little more than tubular, efficient eating machines.
www.amonline.net.au /insects/insects/metamorphosis.htm   (1172 words)

 Encyclopedia: Ant
Ants are holometabolous, and develop by complete metamorphosis, passing through larval and pupal stages before they become adults.
Holometabolism, also called complete metamorphismis, is a term applied to insect groups to describe the specific kind of insect development which includes four life stages - as an embryo, a larva, a pupa and an imago.
Metamorphosis in biology is physical development of the individual after birth or hatching involving significant change in form as well as growth and differentiation.
www.nationmaster.com /encyclopedia/Ant   (3767 words)

 C-b-7   (Site not responding. Last check: 2007-10-18)
The evolutional origin of holometabolous metamorphosis in insects, which is one of the reasons of the large success of insects in the animal world, was investigated through the available literatures and the observations of many life styles of insects in the fields.
The insects with holometabolous metamorphosis or the endopterygotes are characteristic to their larval form relatively simple and dissimilar to the adult one, and the special instar stage of "pupae" existing between the larval and adult one.
Then, the larval-pupal ecdysis in endopterygotes may originated from the necessity for the protection from predators through the excretion of newly cuticle and its hardening during the long periods necessary for the large morphological change in the phase.
www.nig.ac.jp /labs/AR97e/C/C-b-7.html   (271 words)

 Augsburg College Biology - Photo of Month - September-October 2003
In addition to the beetles, other holometabolous insects are flies, butterflies, moths, fleas, ants, bees, wasps, and some others.
Though adult and larval ladybird beetles exploit the same food resources, the holometabolous developmental system often allows juveniles to exploit different food resources from the adults, avoiding competition with the adults, and allowing a greater diversity of resources and niches to be exploited by the species overall.
However, holometabolous insects greatly outnumber us by any measure, be it species diversity, overall biomass, or simply sheer number of individuals.
www.augsburg.edu /home/biology/photoofmonth/ladybird.html   (977 words)

 Gordon's Insect Life-cycles Page
Insects with a complete metamorphosis and a 4 stage life cycle (i.e the Holometabolous ones) do have a pupa and their wings develop inside their bodies and are therefore not seen at all until the adult insect emerges.
The young of holometabolous insects, properly called 'larva' seldom look anything like the adult forms of the insect at all.
Spending the juvenile part of your life under water in a stream or pond is not something that just the hemimetabolous insects do, many holometabolous insects have aquatic larval stages such as most Caddisflies (Trichoptera), some True flies such as Mosquitoes and many Neuroptera and Coleoptera.
earthlife.net /insects/lifecycles.html   (2258 words)

 holometabolous advantages
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hometown.aol.com /saha751/holometabolous-advantages.html   (355 words)

 [No title]   (Site not responding. Last check: 2007-10-18)
The Coleoptera is a diverse order of holometabolous insects with over 5,000 aquatic species (comprising, however, less than 2% of the world's described beetle species).
Holometabolous; adult diagnostically with mesothoracic wings modified as rigid elytra; gaseous exchange usually by temporary or permanent air stores.
Larvae are very variable, all with distinct sclerotised head, strongly developed mandibles, 2-3 segmented antenna; 3 pairs of jointed thoracic legs, lacking abdominal prolegs; open peripneustic (9 pairs of spiracles) tracheal system, but variably reduced spiracle number in most aquatic larvae, some with lateral and/or ventral abdominal gills, sometimes hidden beneath terminal sternite.
www.lucidcentral.com /keys/lwrrdc/public/Aquatics/acarth/html/AR14.htm   (149 words)

Holometabolous development is when the larvae do not resemble the adults and the adult and larva have different habitats and food sources.
Insects the have holometabolous development, including moths and butterflies, may have evolve this type of development as a way to reduce competition for food among the adults and larva.
When a moth or butterfly produces eggs she will begin to search for specific plant species to deposit the eggs so that when the larva hatch they may feed on it as it develops.
www.sas.upenn.edu /~ajeffrey/moths.html   (1414 words)

 Gordon's Insect Life-cycles Page
Insects with a complete metamorphosis and a 4 stage life cycle (i.e the Holometabolous ones) do have a pupa and their wings develop inside their bodies and are therefore not seen at all until the adult insect emerges.
The degrees of change and some of the finer details vary between the various insect orders, as does the degree of movement available to the pupa itself, however the basics are the same for all the holometabolous insects orders.
Spending the juvenile part of your life under water in a stream or pond is not something that just the hemimetabolous insects do, many holometabolous insects have aquatic larval stages such as most Caddisflies (Trichoptera), some True flies such as Mosquitoes and many Neuroptera and Coleoptera.
www.earthlife.net /insects/lifecycles.html   (2230 words)

 List of Orders
Beetles are holometabolous insects, with a life cycle consisting basically of an egg, larva, pupa, and adult or imago; there are some cases, however, where the egg or pupal stage has been eliminated.
As a holometabolous insect, or one that undergoes complete metamorphosis, the Dipteran life cycle includes a series of distinct stages or instars.
Pupation occurs in cells in the soil adjacent to a body of water, in logs in or near the water, or in dry streambeds.
www.ent.ohiou.edu /~jean/myweb/list_of_orders.htm   (2843 words)

 Mopane Worm Life Cycle and Metamorphosis
This change is an example of complete metamorphoses, or Holometabolous development, and happens in the life cycle of all butterflies, moths, bees, ants, beetles and their close relatives.
The mopane worm is actually the caterpillar of the Mopane Moth, Imbrasia belina, and has a holometabolous life cycle similar to that of a silkworm.
If the ancestors of holometabolous insects really were terrestrial hemimetabolous insects it would be important to identify them.
www.nfi.org.za /Displays/mopane_worm_life_cycle_and_metam.htm   (1242 words)

 Bug Camp
For example, the life cycle of the holometabolous fl fly (pictured at right) includes a larval stage that is aquatic.
This may be one explanation why holometabolous insects are so successful.
A holometabolous life cycle, showing egg, larval, pupal, and adult stages.
www.fmnh.org /research_collections/zoology/zoo_sites/bugcamp_web/biolifecycle.htm   (179 words)

 New genetic analysis forces re-draw of insect family tree
The researchers used the genomes of six different insects from the holometabolous group of insects (insects which undergo complete metamorphosis): fruit fly (Drosophila melanogaster), mosquito (Anopheles gambiae), silk moth (Bombyx mori), flour beetle (Tribolium castaneum), honey bee (Apis mellifera) and sibling parasitic wasp species (Nasonia vitripennis and Nasonia giraulti).
These insects represent the four major orders of holometabolous insects, beetles (Coleoptera), moths (Lepidoptera), flies (Diptera) and bees and wasps (Hymenoptera), which together represent 45 per cent of the animal species on earth.
They also included one orthopteran (the grasshopper Locusta migratoria) and one hemipteran (the pea aphid Acyrthosiphon pisum), both of which are uncontested out-groups to the holometabolous insects.
www.eurekalert.org /pub_releases/2006-10/uob-nga102606.php   (641 words)

 Re: by observing a grasshopper as it hatches out of its egg, how could you -
In nearly all insects growth involves a metamorphosis, that is, a transformation in form and in way of life.
Insects in which the adult form is only seen after the last or next-to-last molt of the young are called "holometabolous".
If it would be a holometabolous insect, it would like totally different from its adult form.
www.madsci.org /posts/archives/dec2000/976726457.Zo.r.html   (587 words)

 Evolution of Insect Eye Development: First Insights from Fruit Fly, Grasshopper and Flour Beetle1 Integrative and ...
This is in part due to the derived life cycle and in part to unique morphological modifications of the juvenil instars.
As is typical for holometabolous insects, the fruitfly develops through a series of specialized postembryonic growth stages.
Evidently, the evolution of holometabolous insects must have involved modifications of embryonic development to generate the derived morphology of the larva.
findarticles.com /p/articles/mi_qa4054/is_200308/ai_n9252584   (1026 words)

 The Feeding Lane . com
Most insects can be divided into two groups based on stages in their life cycle - they are either hemimetabolous (Figures 2 and 3) or holometabolous (Figure 4).
A hemimetabolous life cycle proceeds from egg to larva to adult (imago) and a holometabolous life cycle proceeds from egg to larva to pupa to adult.
Figure 4: A representative of a holometabolous insect, the caddisfly has egg, larva, pupa, and adult (imago) stages.
thefeedinglane.com /insects.html   (1411 words)

 Bohart Home   (Site not responding. Last check: 2007-10-18)
In general, insects undergo either incomplete metamorphosis (they are hemimetabolous) or complete metamorphosis (holometabolous).
Thrips are considered to undergo incomplete metamorphosis, yet many species undergo an extended metamorphosis in which the final immature stage is quiescent, non-feeding, and sometimes even enclosed in a silken cocoon.
This developmental stage, usually called a "pupa", has aroused a great deal of speculation by some entomologists who claim that thrips represent an "intermediate" stage between hemi- and holometabolous development.
bohart.ucdavis.edu /diversity/thysanoptera.php   (339 words)

 XML Web Publishing Framework   (Site not responding. Last check: 2007-10-18)
You may also be interested in the Holometabolous project which builds on Cocoon.
Holometabolous is a customizable web portal accessible from any device that can connect to the Internet.
Built upon world reknowned opensource software, with a comfortable BSD liscence Holometabolous is an integrated, best of breed, standards compliment Java/XML/SQL publishing system available free of charge, with source code.
www.infolets.com /956008525   (472 words)

 Sexual Life Cycles
A comparison of young stages in grasshoppers and dragonflies indicates a potential problem with incomplete metamorphosis in insects: the immature forms must grow and develop while they are more or less encased in the form of the adult insect; however, they lack the wings of an adult.
In many (if not most) holometabolous insects, eggs are laid on or near a good source of food for the larva, so the larva is not hindered in its search for food by its relative immobility.
In holometabolous insects, different life stages are specialized for different ecological functions.
userwww.sfsu.edu /~biol240/labs/lab_15animallifecycles/pages/15sexual.html   (2150 words)

 Lecture Schedule 2006
Holometabolous insects: the fleas (Siphonaptera) and disease transmission (bubonic plague and tape worms)
Holometabolous insects: the fleas (Siphonaptera) and disease transmission (bubonic plague)
Holometabolous insects: the flies (Diptera) and diseases of humans and animals [16]
www.ent.iastate.edu /dept/courses/ent374/node/54/print   (222 words)

 NPWRC :: Caterpillars of Pacific Northwest
holometabolous - an insect whose development involves a pupal stage.
larva - one of the immature stages in the life cycle of a holometabolous insect.
pupa - the life stage of a holometabolous insect that follows the larval stage and within which metamorphosis occurs.
www.npwrc.usgs.gov /resource/insects/catnw/gloss.htm   (678 words)

 18S rDNA sequences and the holometabolous insects   (Site not responding. Last check: 2007-10-18)
The Holometabola (insects with complete metamorphosis: beetles, wasps, flies, fleas, butterflies, lacewings, and others) is a monophyletic group that includes the majority of the world's animal species.
Holometabolous orders are well defined by morphological characters, but relationships among orders are unclear.
In a search for a region of DNA that will clarify the interordinal relationships we sequenced approximately 1080 nucleotides of the 5' end of the 18S ribosomal RNA gene from representatives of 14 families of insects in the orders Hymenoptera (sawflies and wasps), Neuroptera (lacewing and antlion), Siphonaptera (flea), and Mecoptera (scorpionfly).
www.sfu.ca /~carmean/mpe.html   (440 words)

 A Guide To
Holometabolous; larvae either caterpillar like (sawflies) or wormlike.
The compound eyes are large, the antennae are variable and cerci are absent.
Holometabolous, the larvae are usually legless and wormlike, often without a well developed head capsule.
entomology.unl.edu /tmh/ent115/labs/diptera.htm   (1848 words)

 Holometabolous Development -- Encylopedic Reference of Parasitology   (Site not responding. Last check: 2007-10-18)
This type of development, which is the most common in insects, is also found in large groups of ectoparasites (e.g.,
In general three different types of developmental stages occur during a holometabolous life cycle: larva,
Larvae, which hatch from the egg and which may undergo a species-specific number of molts, are completely different from the adults.
parasitology.informatik.uni-wuerzburg.de /login/n/h/0666.html   (196 words)

 IP Development   (Site not responding. Last check: 2007-10-18)
The three life stages that are seen in ancestral insect species -- pronymph, nymph and adult -- are proposed to be equivalent to the larva, pupa, and adult stages of insects with complete metamorphosis.
This transition from hemimetabolous to holometabolous development has been accompanied by changes in the endocrine patterns underlying growth and metamorphosis and in the way that tissues respond to these hormonal cues.
This has been associated with the transformation of the transitional pronymphal stage of hemimetabolous insects into the holometabolous larval stage (Truman and Riddiford, 1999, Nature 410,447).
www.faculty.ucr.edu /~insects/systems/development/jt_evolution.html   (532 words)

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