
	Where results make sense

Topic: Hemimetabolous

In the News (Tue 17 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Insects - Nymphs, hoppers and mudeyes - Hemimetabolous insects
		Insects - Nymphs, hoppers and mudeyes - Hemimetabolous insects
		The feeding habits of hemimetabolous insects commonly mirror that of the adults, but often with a significant twist.
		The final moult between mature nymph and adult is usually accompanied by changes in colour, and in shape of the body, but there is never the dramatic difference between larvae and adult as observed in holometabolous insects.
	www.austmus.gov.au /insects/insects/nymphs.htm (239 words)

	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)

	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.
		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.
		The skins of caterpillars and maggots stretch a lot more than those of the hemimetabolous insects and because they often have far smaller and simpler legs the process of the moult takes less time and is therefore less often seen.
	www.earthlife.net /insects/lifecycles.html (2230 words)

	Insects - Metamorphosis - A remarkable change
		Typical life cycle of a hemimetabolous insect such as a dragonfly.
		All these groups have a life cycle where the egg hatches into a larva (eg a caterpillar, grub, maggot) which goes through an inactive, pupa stage (eg wrapped up like a cocoon) before emerging as an adult (eg a butterfly, beetle, wasp).
		Typical hemimetabolous insects are the Hemiptera (Scales, Aphids, Whitefly, Cicadas, Leafhoppers and True Bugs), Orthoptera (Grasshoppers and Crickets), Mantodea (Praying Mantids), Blattodea (Cockroaches), Dermaptera (Earwigs) and Odonata (Dragonflies and Damselflies).
	www.amonline.net.au /insects/insects/metamorphosis.htm (1172 words)

	Hemimetabolism - Wikipedia, the free encyclopedia
		Hemimetabolism or hemimetaboly, also called incomplete metamorphosis, is a term used to describe the mode of development of certain insects that includes three distinct stages: the egg, nymph, and the adult stage, or imago.
		Paurometabolism reffers to insects whose nymphs occupy the same environment as the adults, as in the family Gerridae of hemiptera.
		The hemimetabolous insects are those whose nymphs, called naiads, occupy aquatic habitats while the adults are terrestrial.
	en.wikipedia.org /wiki/Hemimetabolism (295 words)

	The Feeding Lane . com
		However, some stoneflies have been found at a depth of 4 m and as far away as 30 m from the stream.
		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.
	thefeedinglane.com /insects.html (1411 words)

	Lepidopteran Metamorphosis: Applications & Evolution (Site not responding. Last check: 2007-10-08)
		In hemimetabolous insects, the pronymph refers to a recently egg hatched stage that is not capable of feeding and that is less developed than the later nymphal stage.
		Truman & Riddiford (2002) believe that shifts in the endocrinology of embryogenesis may have led to the evolution of a larval stage from this pronymph stage.
		Truman & Riddiford's (2002) comparison of embryonic JH titres (dashed line) in a (A) hemimetabolous insect (Locusta migratoria) and (B) the holometabolous lepidopteran (Manduca sexta).
	www.zoo.utoronto.ca /zoo344s/2006Group10/applications_and_evolution.htm (345 words)

	Evolution of Insect Eye Development: First Insights from Fruit Fly, Grasshopper and Flour Beetle1 Integrative and ...
		Here we review aspects of early Drosophila eye development, which are likely to have diverged from the situation in more primitive insects, as indicated by results from work in the flour beetle Tribolium castaneum and the grasshopper Schistocerca americana.
		The immature instars or nymphs of hemimetabolous insects such as grasshopper or cockroach for instance are born with adult like morphology.
		The first instar nymph possesses a pair of fully functional compound eyes, which are enlarged between the subsequent growth molts and maintained into the adult.
	www.findarticles.com /p/articles/mi_qa4054/is_200308/ai_n9252584 (1026 words)

	U of M: Department of Entomology: ENT 4251: Lab 3: Insect Classification.
		For the purposes of this course, we will ignore ametabolic insects and consider the hemimetabolic and paurometabolic developmental programs to be the same and refer to them as hemimetabolic.
		HEMIMETABOLOUS (and Paurometabolous): Adults and immatures look similar although the immatures, called NYMPHS or NAIADS, do not have wings but have external wing pads.
		Adults and immatures are found in the same habitat, occupy the same niche, and are almost all terrestrial.
	www.entomology.umn.edu /classes/ent4251/LaboratoryHTMLs/Lab3/Lab3.html (561 words)

	Bioline International Official Site (site up-dated regularly)
		The possession of dorsal ocelli is a typical characteristic of adult insects, but little attention has been paid to ocellar development along the larval life.
		In holometabolous insects ocelli are said to be differentiated from the compound eye/antennal/ocellar imaginal disc (Caesar 1913), whereas in hemimetabolous insects they are variously reported as "present" or as being "formed" or "perfected" in the larval stages.
		In some cases, like locusts and mayflies, there are clearly visible ocelli with obvious lenses even in early instars, whilst stone-flies and dragon-flies, for example, show only pigmented spots or faint traces of the tapetal layer beneath the cuticle until just prior to adult emergence (Goodman 1981).
	www.bioline.org.br /request?oc00143 (1351 words)

	Interactive Fly, Drosophila
		Insects can be grouped into two main categories, holometabolous and hemimetabolous, according to the extent of their morphological change during metamorphosis.
		Leg development of the hemimetabolous short-germ insect, Gryllus bimaculatus (cricket), has been studied focusing on expression patterns of the three key signaling molecules, hedgehog, wingless and decapentaplegic, which are essential during leg development in Drosophila.
		To understand the mechanism of regeneration, many experiments have been carried out with hemimetabolous insects, since their nymphs possess the ability to regenerate amputated legs.
	www.sdbonline.org /fly/torstoll/decapn2a.htm (6299 words)

	BioMed Central \| Full text \| LocustDB: a relational database for the transcriptome and biology of the migratory locust ...
		The migratory locust (Locusta migratoria) is an orthopteran pest and a representative member of hemimetabolous insects for biological studies.
		LocustDB starts with the first transcriptome information for an orthopteran and hemimetabolous insect and will be extended to provide a framework for incorporating in-coming genomic data of relevant insect groups and a workbench for cross-species comparative studies.
		Our data came from a study concerning the migratory locust (Locusta migratoria), a representative member of hemimetabolous insects, which has a unique behavioral phenotype: changing phases from a solitary state to a gregarious one when environmental and genetic factors interact due to crowdedness [4].
	www.biomedcentral.com /1471-2164/7/11 (1973 words)

	From the Cover: Differential expression patterns of the hox gene are associated with differential growth of insect hind ...
		nymph stages in hemimetabolous insects (firebrats are ametabolous
		For hemimetabolous species (mantids and cockroaches), dissected T2 and T3 legs of first nymph stages are displayed in A and E.
		larval appendages are not homologous to hemimetabolous legs.
	www.pnas.org /cgi/content/full/101/14/4877 (3760 words)

	Worksheet #3
		The life stages of a hemimetabolous insect are: egg => nymph => adult What physical characteristics could you use to distinguish a hemimetabolous nymph from an ametabolus young?
		Very primitive hemimetabolous insects cannot fold their wings over the back.
		This is known as the paleopterous condition (meaning primitive wing).
	www.cals.ncsu.edu /course/ent425/worksheets/work03.html (145 words)

	[No title]
		Hemipterans are hemimetabolous insects, but so are the Orthopterans, Isopterans, and Homopterans.
		The larvae of hemimetabolous insects usually resemble the adult except the larvae are smaller, lack winds, and genitalia.
		Chapman, R. 1982 The Insects: Structure and Function.
	www.rci.rutgers.edu /~insects/q2q1a1.htm (51 words)

	Olympus MIC-D: Brightfield Gallery - Canine Biting Louse (Trichodectes canis)
		Symbiotic bacteria found in specialized mycetocytes in the insect's fat reserves are required for digestion, and when individuals are deprived of these bacteria, they perish in a few days.
		With a life cycle that takes about three to four weeks, and includes incomplete metamorphosis (hemimetabolous), canine biting lice can be found anywhere on the dog's body.
		While rare on healthy animals, poorly nourished dogs may have heavy infestations, adding to their troubles.
	www.olympusmicro.com /micd/galleries/brightfield/trichodectescanis.html (437 words)

	Eric's Research
		Most parasitoid diversity patterns have been identified from studies of holometabolous hosts (insects with complete metamorphosis: egg, larva, pupa, adult).
		Immature stages, the stages most often attacked by parasitoids, closely resemble adults in hemimetabolous insects which may affect the ability of parasitoid to attack hemimetabolous hosts.
		I have finished a project that combines several small scale studies to explore global patterns of parasitoid diversity among aphids, a representative hemimetabolous family.
	www.ags.uci.edu /~eporter/research.html (894 words)

	Studqus3 (Site not responding. Last check: 2007-10-08)
		Discuss the life cycle of the aphid, including the mechanism by which it can attain such high population numbers.
		Discuss the role of hormones in controlling molting, metamorphosis, and reproduction in hemimetabolous and holometabolous insects.
		Discuss the use of ligation, decapitation and implantation in early research on insect hormones.
	www.wm.edu /biology/entomology/Studqus3.html (1248 words)

	Lecture Schedule 2006 \| Insects and Our Health (Ent 374) (Site not responding. Last check: 2007-10-08)
		Hemimetabolous insects: the true bugs (Hemiptera), bed bugs (Cimicidae) and assassin bugs (Reduviidae)
		Hemimetabolous insects: the lice (Phthiraptera) and disease transmission (typhus and trench fever)
		Holometabolous insects: the fleas (Siphonaptera) and disease transmission (bubonic plague and tape worms)
	www.ent.iastate.edu /dept/courses/ent374/node/54 (179 words)

	Hemimetabolous
		The nymphs and adults of hemimetabolous insects are usually similar in shape and habits.
		Perhaps no concept in entomology has resulted in more polarization of thought than that of categorizing development into types.
		Major hemimetabolous insects important in plant protection include the Orthoptera, the Thysanoptera, the Heteroptera and the Homoptera.
	www.inra.fr /hyppz/ZGLOSS/6g---180.htm (179 words)

	Study Guide: Development and Metamorphosis
		In the general sense what are the characteristics of hemimetabolous development?
		What do hemimetabolous immature insects lack that adults possess?
		Considering the subgroupings of hemimetabolous development, make comparisons of immatures and adults based on items in the following table:
	www.uwrf.edu /~cg04/333/SG_metamorph.html (243 words)

	Hypothesis Testing in Evolutionary Developmental Biology: A Case Study from Insect Wings -- Jockusch and Ober 95 (5): ...
		of the ectoderm, just as they do in hemimetabolous taxa.
		in hemimetabolous groups, but compressed into the end of the
		hemimetabolous, and holometabolous species (Figure 7) (Beermann et al.
	jhered.oxfordjournals.org /cgi/content/full/95/5/382 (7973 words)

	Gordon's Zoraptera Page
		They are also small in size being less than 3 mm long.
		They are hemimetabolous, have biting mouthparts, very short, 1 segmented cerci, and 9 segmented antennae.
		They are generally found under bark or in humus and leaf-litter.
	www.earthlife.net /insects/zorapter.html (649 words)

	Untitled Document (Site not responding. Last check: 2007-10-08)
		They go through a pupal stage before emerging as a mature adult able to reproduce.
		The hatchlings look different because they emerge from the egg at an earlier stage of development (in Hemimetabolous insects, all these stages take place inside the egg).
		Some larvae look like familiar caterpillars with two different types of legs; others look like mealworms with only the front true legs; yet others have no legs at all like fly maggots.
	www.szgdocent.org /resource/ff/f-arth2b.htm (452 words)

	hemimetabolous - Dictionnaire Français-Anglais WordReference.com
		We found no English translation for 'hemimetabolous' in our French to English Dictionary.
		Or did you want to translate 'hemimetabolous' from English to French?
		Forum discussions with the word(s) 'hemimetabolous' in the title:
	www.wordreference.com /fren/hemimetabolous (41 words)

	Correlation of diversity of leg morphology in Gryllus bimaculatus (cricket) with divergence in dpp expression pattern ...
		hemimetabolous, according to the extent of their morphological change
		The three thoracic legs, for example, are known to
		legs through their imaginal discs, while hemimetabolous legs develop from
	dev.biologists.org /cgi/content/abstract/127/20/4373 (670 words)

	Glossary of biological terms: H (Site not responding. Last check: 2007-10-08)
		These immature forms are usually referred to as nymphs.
		Examples of hemimetabolous insects include dragonflies, cockroaches, termites, grasshoppers, bugs and lice.
		Other insects have an incomplete or hemimetabolous metamorphosis.
	www.museums.org.za /bio/glossary/bio/h.htm (221 words)

Try your search on: Qwika (all wikis)