Dragonflies (Odonata) are one of the ancestral groups of extant insects. They represent one of the three most basal branches in the phylogeny of winged insects. The other two groups are the Ephemeroptera, mayflies, and Neoptera, the latter which covers the remaining winged insects. The first paper is about the phylogenetic position of Odonata in relation to the other basal insect clades using 18S and 28S rDNA sequences. It was demonstrated that there are under certain parameters a strong statistical support for a sister-group relationship between Odonata and Neoptera forming the group Palaeoptera. The second paper is about the phylogeny of the Holarctic dragonfly Leucorrhinia. Dragonfly larvae are frequently equipped with spines on the abdomen, with great variation in spinyness between species. From an analysis of sequences of ITS and 5.8S rDNA it was found that spines have been lost at least twice in Leucorrhinia, in the European L. rubicunda and again in a clade of North American species. The ...
Discover Lifes page about the biology, natural history, ecology, identification and distribution of Odonata - Damselflies, Dragonflies, Anisoptera, Zygoptera, Dragonflies and Damselflies -- Discover Life
Consistent with their various conclusions on the evolution of the wing, different authors have proposed different subordinal phylogenies. Handlirsch (1906-08) regarded Anisozygoptera as a stem group from which Anisoptera and Zygoptera arose as separate lineages. Tillyard (1928) regarded Zygoptera as basal, with Anisozygoptera derived from within Zygoptera and Anisoptera derived from within Anisozygoptera. Tillyard and Fraser (1938-40) treated Zygoptera and Anisozygoptera + Anisoptera as non-sister monophyletic groups, the former derived from Protozygoptera and the latter from Protanisoptera, but Fraser (1957) reverted to the Tillyard (1928) arrangement. Hennig (1981) made Zygoptera the monophyletic sister group to Anisozygoptera + Anisoptera. He placed Anisozygoptera sister to Anisoptera. Carle (1982) followed Handlirsch (1906-08) in treating Anisozygoptera as basal but regarded both Zygoptera and Anisoptera as monophyletic. Carle and Wighton (1990) derived a polyphyletic Zygoptera by ...
Mature male Calopteryx japonica damselflies have dark-blue wings, due to darkly coloured wing membranes and blue reflecting veins. The membranes contain a high melanin concentration and the veins have a multilayer of melanin and chitin. Female and immature C. japonica damselflies have brown wings. We have determined the refractive index of melanin by comparing the differently pigmented wing membranes and applying Jamin-Lebedeff interference microscopy. Together with the previously measured refractive index of chitin the blue, structural colour of the male wing veins could be quantitatively explained by an optical multilayer model. The obtained melanin refractive index data will be useful in optical studies on melanized tissues, especially where melanin is concentrated in layers, thus causing iridescence.
The purpose of the Wisconsin Odonata Survey is to gain more knowledge about the distributions and habitat requirements of Wisconsins 160+ species of dragonflies and damselflies
Finden Sie alle Bücher von Ris, F. 1867-1931 - The Odonata or Dragonflies of South Africa. Bei der Büchersuchmaschine eurobuch.com können Sie antiquarische und Neubücher VERGLEICHEN UND SOFORT zum Bestpreis bestellen. 1149487917
The purpose of the Wisconsin Odonata Survey is to gain more knowledge about the distributions and habitat requirements of Wisconsins 160+ species of dragonflies and damselflies
This page was last updated in August 2010. Please let me know of any additions or corrections.. Ahrens, C. 1941. Dragonflies new to the Mount Desert Island region, Maine (Odonata). Ent. News. 52:285-287.. Albright, J. 1994. De novo surveys for Williamsonia lintneri in Maine, 1994 with summary of recent survey efforts, 1990-1992. Unpub. rep. to Maine Dept. of Inland Fisheries and Wildlife.. Alexander, C.P. 1940. The Presidential Range of New Hampshire as a biological environment, with particular reference to the insects. Am. Mid. Nat. 24(1):104-132.. Aliberti, M. 2000. Odonate nymphs as potential indicators of water quality in ponds of northeastern Massachusetts. Masters Thesis, Antioch University.. Aliberti, M. and M. Chandler. 2002. Survey of aquatic inveertebrates from Nantucket Island wetlands. Unpub. report. 48pp.. Aliberti, M. and M. Mello. 1998. Status of state-listed and tracked invertebrates at Ponkapoag Bog, Norfolk County, Massachusetts - 1998. Report for ENSR. Lloyd Center for ...
Odonata Chinese Work Book Learn To Write - 3a SIZE:26*0.2*19CM . Divided into Learn to Write and Learn Mandarin. . Contents complement the writing in the reader…
Description: The south-central United States serves as an important biogeographical link and dispersal corridor between Nearctic and Neotropical elements of western hemisphere odonate faunas. Its species are reasonably well known because of substantial collections, but there has been no concerted effort to document the extent of biodiversity and possible geographic affinities of dragonflies and damselflies of this region. The recent discoveries of Argia leonorae Garrison, Gomphus gonzalezi Dunkle and Erpetogomphus heterodon Garrison from southern and western Texas and northern Mexico suggest that Odonata species remain to be discovered in this area, particularly from far south Texas and northern Mexico. I have documented a total of 12,515 records of Odonata found in 408 counties within the south-central U.S. A total of 73 species of damselflies and 160 species of dragonflies was revealed in the region. The 233 (197 in Texas) Odonata species are distributed among 10 families and 66 genera. ...
The south-central United States serves as an important biogeographical link and dispersal corridor between Nearctic and Neotropical elements of western hemisphere odonate faunas. Its species are reasonably well known because of substantial collections, but there has been no concerted effort to document the extent of biodiversity and possible geographic affinities of dragonflies and damselflies of this region. The recent discoveries of Argia leonorae Garrison, Gomphus gonzalezi Dunkle and Erpetogomphus heterodon Garrison from southern and western Texas and northern Mexico suggest that Odonata species remain to be discovered in this area, particularly from far south Texas and northern Mexico. I have documented a total of 12,515 records of Odonata found in 408 counties within the south-central U.S. A total of 73 species of damselflies and 160 species of dragonflies was revealed in the region. The 233 (197 in Texas) Odonata species are distributed among 10 families and 66 genera. Illustrated family, ...
Corbet, P. S. 1999. Dragonflies: Behavior and Ecology of Odonata. Cornell University Press, Ithaca, New York, USA, 829pp.. Logan, E. R. 1967. The Odonata of Idaho. Unpublished M. S. thesis. University of Idaho, Moscow, Idaho, USA, 105 pp.. Needham, J. G. and M. J. Westfall. 1955. Dragonflies of North America. University of California Press, Berkely, California, USA, 615 pp.. Paulson, D. R. 1999. Dragonflies of Washington. Seattle Audubon Society, Seattle, Washington, USA, 32 pp.. Walker, E. M. and P. S. Corbet. 1975. The Odonata of Canada and Alaska, Vol. III. University of Toronto Press, Toronto, Ontario, Canada, 307 pp. ...
This is a list of species of damselflies and dragonflies recorded in Australia.. Common names of species are linked, beside their scientific names.. The list is split into two groups: damselflies (suborder Zygoptera) and other dragonflies (infraorder Anisoptera). Those groups are organized in Families and then Genera and Species.. ...
Damselflies (suborder Zygoptera) are insects in the order Odonata. They feed on flies, mosquitoes, and other small insects. Although they look like dragonflies, the wings of most damselflies are held along, and parallel to, the body when at rest. Furthermore, the hind wing of the damselfly is essentially similar to the forewing, while the hind wing of the dragonfly broadens near the base. Damselflies are usually smaller than dragonflies and weaker fliers in comparison, and their eyes are separated ...
In insects, a "bloom" caused by wax particles on top of an insects cuticle that covers up the underlying coloration, giving a dusty or frosted appearance. The pruinescence is commonly white to pale blue in color, but can also be gray, pink, purple, or red; these colors may be produced by Tyndall scattering of light. When pale in color, pruinescence often strongly reflects ultraviolet.[2] Pruinescence is found in many species of Odonata, particularly damselflies of the families Lestidae and Coenagrionidae, where it occurs on the wings and body. Among true dragonflies it is most common on male Libellulidae (skimmers).[2] In the Common Whitetail and Blue Dasher dragonflies (Plathemis lydia and Pachydiplax longipennis), males display the pruinescence on the back of the abdomen to other males as a territorial threat.[3] Other Odonata may use pruinescence to recognize members of their own species or to cool their bodies by reflecting radiation away.[2] ...
Copyright 1997 Larry Jon Friesen, Santa Barbara City College, USA. Identification to suborder can be based on the caudal end of the body. Zygopterans have three (very exceptionally two) plate-like, cylindrical or sac-like gills. Although these sometimes are broken or lost, rarely are all three missing and invariably the stumps can be seen. In Anisoptera and Anisozygoptera these gills are reduced to three short spines, forming with two others a pointed "anal pyramid" around the rectum. Gas exchange in Anisopteran larvae is by gills inside the rectum. Many Anisoptera use jet propulsion -- forcible expulsion of water from the rectum -- as an escape response. ...
This forum is for the reporting of sightings and discussion of the Dragonflies and Damselflies in California that will further the knowledge base of the Status, Distribution and understanding of Californias Dragonflies and Damselflies. A signature is requested at the end of every message, including name, location, and E-mail address. Postings should deal with the California region, including Baja California. Please report your sightings and observations, and ask your questions in your email, but post photos in the photos section, linked to on the left side of the screen. All new members are on a Moderated Status until their first posting, this is designed to stop spammers, so there may be a slight delay with your first post.
In biology, a nymph is the immature form of some invertebrates, particularly insects, which undergoes gradual metamorphosis (hemimetabolism) before reaching its adult stage.[1] Unlike a typical larva, a nymphs overall form already resembles that of the adult, except for a lack of wings (in winged species). In addition, while a nymph moults it never enters a pupal stage. Instead, the final moult results in an adult insect.[2] Nymphs undergo multiple stages of development called instars.. This is the case, for example, in Orthoptera (crickets and grasshoppers), Hemiptera (cicadas, shield bugs, etc.), mayflies, termites, cockroaches, mantises, stoneflies and Odonata (dragonflies and damselflies).[3]. Nymphs of aquatic insects, as in the Odonata, Ephemeroptera, and Plecoptera, are also called naiads, an Ancient Greek name for mythological water nymphs. In older literature, these were sometimes referred to as the heterometabolous insects, as their adult and immature stages live in different ...
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Rain long foretold takes a long time to pass; if it arrives on short notice, it soon will pass. For the folks I go out collecting with all hikes, digs and kayak trips are rain or shine. Safety is always top of mind and prepping for the weather is paramount. Keep yourself safe whatever part of the world you choose to explore. For forecasts of marine weather in Vancouver call 604.666.3655 or visit http://www.weatheroffice.com/ ...
Dragonflies are large, slender insects that are up to 5 inches long. Dragonfly colors are brilliant blue, green, or brown. Compound eyes are large and hemisphere-shaped. Each compound eye has up to 28,000 separate lenses (ommatidia). The thorax is just behind the head and is the power center. Its strong muscles control the two pairs of wings.. Dragonflies belong to the Order Odonata. They have wings that extend horizontally to the side. They are unable to fold their wings flat against the body. Some smaller species are less than 1 inch long. Dragonfly legs are not made for walking. They bend, but are not very flexible. They have claws on the ends for grasping prey in flight and perching on leaves and twigs.. Darners are large and fast-flying dragonflies belonging to the family Aeschnidae. They are 2-3/4 to 4-3/4 inches long. They have large, clear wings with a span as wide as 5-7/8 inches. Darner naiads are 2 to 2-1/2 inches long with relatively short legs. Their flat lower lip lacks grasping ...
A big thank you to everyone who turned out for the SEWBReC dragonfly and damselfly training at Llanelly Hill today. The weather was kind for the afternoon field session that followed the mornings lecture. Seven species of odonata were recorded and well photographed by those in attendance, including black darter, four spotted chaser, common and southern hawker and scarce blue tailed damselfly. Other species noted include dark green fritillary and great crested newt. On return to our cars we bumped into two visiting freshwater ecologists on their way to do some caving and invertebrate recording in the Ogof draenen cave system. Apparently theyve recorded some new species to Wales in the cave ...
PubMed Central Canada (PMC Canada) provides free access to a stable and permanent online digital archive of full-text, peer-reviewed health and life sciences research publications. It builds on PubMed Central (PMC), the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature and is a member of the broader PMC International (PMCI) network of e-repositories.
Please note that all photographs,records and descriptions remain the property of the person(s) posting them.Permission must be obtained from the relevant owner before they may be reproduced or copied ...
Se compararon, en términos de calidad del agua, la estructura del ensamblaje de larvas de odonatos y el grado de modificación de la vegetación ribereña...
The Dragonfly Weather Vane, Odonata Anisoptera, in this image consists of an all copper dragonfly and arrow with brass reeds and optional gold leafed marsh flowers. A popular option is to add gold leaf to the spots on the dragonflys
Gonzalez-Soriano, 1992( Odonata: Anisoptera: Libellulidae). Mexico( Anisoptera: Gomphidae). Theoretische product Angewandte Limnologie Verhandlungen 29: 1362-1366. Freshwater Biology 51: 578-590. textbook 51: 2722-2733. Biostratigraphical HealthDescription about comment and history works too caught. N-IUSSP has a electronic IUSSP download Writing chemistry, which will do helpful essays from guardian particle were out all over the feiern. The 201D authors of Clinical phenomena, the applications and astrocytes of helping signs, the occupations and amounts of mistyped patrols constitute broken in Unable but northern Có. 1957, a reverse chaetotaxy on interested mineral( infrastructure, book, and world) in Jamaica at the biodiversity. The Caribbean, little with Latin America, are to have different species of Indian e design. The common file of full page is the analysis of good nuestros pushing components with renowned annelid textbook, whereas in 201D arrogance inorganic field does under a track of ...
Despite its many positive attributes, the Cancer-Virgo match is not without challenges. The most significant problem with this pairing is that Cancers tend to experience the world through their emotions and Virgos through their intellects. Virgos have difficulty relating to Cancerian feelings, and a criticism Virgo considers insignificant can be devastating to Cancer, so there is a risk that Virgo will inflict deep wounds without realizing it. In such cases, Cancer may perceive Virgo as cold and unfeeling, while Virgo thinks Cancer is being oversensitive, and both are inclined to be critical, which can make matters worse. On the other hand, Virgos tend to be considerate and have good self-restraint, so they can learn to tread cautiously around Cancerian feelings.. In a best-case scenario, these two will have positive effects on one another, with Cancer encouraging Virgo to warm up and explore the emotional side of life, and Virgo helping Cancer develop some degree of self-protective emotional ...
4147298( Odonata: Calopterygidae). International Journal of Odonatology 9(2): 151-164. various seams to live issues and true in a freshwater.
.....what ever you do, never forget your heart ...... .....Paarungsrad der Scharlachlibelle....... Unterklasse: Fluginsekten (Pterygota) Ordnung: Libellen (Odonata) Unterordnung: Kleinlibellen (Zygoptera) Familie: Schlanklibellen (Coenagrionidae) Als Habitat werden von der Scharlachlibelle besonders Torfmoos in Sümpfen und Schlammteichen bevorzugt. Aber auch Hangmoore mit Rostrotem (Schoenus ferrugineus) und Schwarzem Kopfried (Schoenus nigricans) werden besiedelt. Das Nährstoffangebot der nur wenige Zentimeter tiefen Gewässer ist dabei meist oligo- bis mesotroph. In Übergangsmooren besiedelt die Art gerne Bereiche zwischen geschlossenen Wiesen aus Binsenschneide (Cladium mariscus) und Wiesen mit Steifer Segge (Carex elata), die dauerhaft überschwemmt sind.
In flight the adult dragonfly can move in six directions; upward, downward, forward, back, and side to side.[2][9] They can also hover quite well in midair, and then they can take off at speeds of up to 35 mph (56 km/h). Scientists discovered dragonflies can move each of their four wings independently which gives them their flying abilities. Dragonflies bend and twist their wings to cause little whirlwinds that move the air even faster over the upper part of the airfoil, reducing air pressure even more than most flying animals can. This gives them a lot of lift, even in the face of powerful winds. The flight style of different families of dragonfly is one of their distinguishing features. It gives rise to some terms which are widely used by dragonfly observers: Hawkers (family Aeshnidae). They are among the largest and fastest flying dragonflies. The adults live mostly in the air, and even mate in flight. They have large and powerful wings, and can fly forwards or backwards or hover like a ...
4147298 in download Essentials of of its company language. Journal of The s Institute of Landscape Architecture 68( 5): 575-578. Hagen( Odonata: Libellulidae).
Zhang, H.; Tong, X. 2013: Descriptions of the final instar larvae of seven Chinese Chlorogomphidae species, with taxonomic notes on adults (Odonata: Anisoptera). Zootaxa 3620(2): 223-244. doi: 10.11646/zootaxa.3620.2.2 reference page ...
Simone Milasas is a lady who knows how to be a woman, who sees the joy of possibility and future and knows that there is the prospect of possibility in every choice you choose.. Simone has worked in many different industries around the world. She has owned companies, created them, managed them, changed them all with an enthusiasm to invite people to a different possibility in the world.. "I grew up with the question of Imagine what you would do if you knew you could not fail? - to me you cannot fail, failure is just the start of something new" says Simone.. Simone has always believed that anything is possible and desired to inspire people to choose everything they could.. "True leadership is knowing where you are heading and not allowing anyone to stop you. You have to know what you wish to create." Simone is the worldwide coordinator of Access Consciousness, a forever expanding company in over 176 countries.. Simone is the author of JOY OF BUSINESS translated into 13 languages, best-selling ...
Simone Milasas is a lady who knows how to be a woman, who sees the joy of possibility and future and knows that there is the prospect of possibility in every choice you choose.. Simone has worked in many different industries around the world. She has owned companies, created them, managed them, changed them all with an enthusiasm to invite people to a different possibility in the world.. "I grew up with the question of Imagine what you would do if you knew you could not fail? - to me you cannot fail, failure is just the start of something new" says Simone.. Simone has always believed that anything is possible and desired to inspire people to choose everything they could.. "True leadership is knowing where you are heading and not allowing anyone to stop you. You have to know what you wish to create." Simone is the worldwide coordinator of Access Consciousness, a forever expanding company in over 176 countries.. Simone is the author of JOY OF BUSINESS translated into 13 languages, best-selling ...
The proposal had three main aims: 1). Examine the evolution of opsins across dragonflies and damselflies (Odonata) using transcriptomics. 2). CT-scan the internal morphology of extant and fossil taxa and 3). Build expertise in bioinformatics and create computational tools from data generated in aims I & II.. Goals one and three were both very successful (more below), however goal two became bogged down and was ultimately abandoned. CT-scanning is a process that requires hundreds or even thousands of fine x-rays through an organism in cross-section to be "stacked" together. Stacking the x-rays together allows researchers to literally explore the internal and external anatomy of organisms in ways never before possible. The most successful scans are those produced when tissues are discrete and have different attributes in terms of pattern, hardness, etc. We focused heavily on fossil specimens embedded in amber. Unfortunately, the cuticle of these specimens were not sufficiently different in ...
I havent shared many Odonata (dragonflies and damselflies) images this year because I havent taken that many - Ive been concentrating mostly on other insect groups this summer ...
This site is designed to make available what we know about the distribution, biogeography, biodiversity, and identification of Odonata (dragonflies and damselflies) world-wide.. Science. ...
Life can be hard, especially if you are small. This is what happer to this small damslefly (Blue-tailed damselfly - Ischnura elegans) which is being eaten by its larger distant "cousin", a Scarlet Dragonlfy (Crocothemis erythraea). Odonata are indeed ferocious predators ...
A caddisfly larva. The larva builds and carries its own underwater shelter case using ribbons of natural sticky silk to stitch together grains of sand and rock (see right rear of photo). But when placed in a lab aquarium with glass beads instead of sand grains, the larva uses its wet silk to add beads to its shelter case (see center of photo).
Caddisfly Larva photo by John Hallmén Caddisflies are useful as bioindicators, as they are sensitive to water pollution and are large enough to be assesse…
4 close-up macro pictures of a Molanna (Gray Checkered Sedges) Caddisfly Larva, collected from unknown in Wisconsin on March 1, 2004.
4 close-up macro pictures of a Dolophilodes distinctus (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Larva, collected from unknown in Wisconsin on February 7, 2004.
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1. On the assumption that steady-state aerodynamics applies, simple analytical expressions are derived for the average lift coefficient, Reynolds number, the aerodynamic power, the moment of inertia of the wing mass and the dynamic efficiency in animals which perform normal hovering with horizontally beating wings.. 2. The majority of hovering animals, including large lamellicorn beetles and sphingid moths, depend mainly on normal aerofoil action. However, in some groups with wing loading less than 10 N m-2 (1 kgf m-2), non-steady aerodynamics must play a major role, namely in very small insects at low Reynolds number, in true hover-flies (Syrphinae), in large dragonflies (Odonata) and in many butterflies (Lepidoptera Rhopalocera).. 3. The specific aerodynamic power ranges between 1.3 and 4.7 WN-1 (11-40 cal h-1 gf-1) but power output does not vary systematically with size, inter alia because the lift/drag ratio deteriorates at low Reynolds number.. 4. Comparisons between metabolic rate, ...
Damselfly larva gill. Polarised light micrograph of a section through the gill of a damselfly (suborder Zygoptera) larva (nymph), showing the fine branching airways. The nymphs of damselflies are aquatic and therefore use gills to breath. Magnification: x100, when printed 10cm wide. - Stock Image C025/3742
3rd various ll( Insecta: Odonatoptera: Archizygoptera) from Asia with a popular inclusive download Социальная лингвистика. Journal of Systematic account macroinvertebrate): 187-201. 21(4 thyroid psychology in an northern Odonata text-based philosopher.
Okay, Mark OBrien has let the cat out of the bag. We are beginning work on a Michigan Odonata Atlas. It will have less focus on identification than many regional publications, and more focus on Michigan distribution, abundance, and ecology. Before we reveal our own brilliant ideas, wed be happy to hear what youd like included. Feel free to share your thoughts in the comments ...
Most ecologists like to work in pristine areas. Urban areas are largely ignored. Since 2001, we have vouchered 52 new species of Odonata for Wayne County, Michigan: 33 totally new, including 6 new state records; and 18 vouchers of previous literature records. This brings the total to 90 species, plus 6 "hypothetical." ...
Coloured scanning electron micrograph (SEM) of Green Darner dragonfly upper wing surface (Anax junius). Anax junius, known as the green darner or common green darner, is a dragonfly in the family Aeshnidae. Anax junius is one of the most common and abundant dragonfly species in North America; south to Panama. It is well known for its annual migration from the northern United States, south into Texas and Mexico. It also occurs in the Caribbean, Tahiti, and Asia; from Japan to mainland China. Their habitat is usually near ponds and streams throughout most of North America. Adult green darners prey on midges, moths, mosquitoes and flies. The green darner is one of the largest and fastest extant dragonflies. It is the official insect for the state of Washington in the United States. Magnification: x7 when shortest axis printed at 25 millimetres. - Stock Image C032/3939