DOCSLIB.ORG

Algae. Aquati

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Algae. Aquati 11 Notul. odonatol., Vol. I, No. 1,pp. 1-16, June 1, 1978 Notes on the dragonfly fauna of very small pools near Münster, Westfalia, German Federal Republic R. Rudolph Lehrgebiet Biologie,Pädagogische Hochschule, Fliednerstr. 21, D-44 Münster, German Federal Republic Abstract — The odonate fauna of small ous differences between the findings of meadow pools was recorded for several these authors and mine, as far as faunistics years. Even the permanent pools cenoses are are concerned. relatively poor; Lestidae are completely lacking. Pyrrhosoma nymphula and Ery- Vegetation thromma najas dominate in clean waters, Several types of meadow pools can be whereas Ischnura elegans withstands a cer- distinguished: tain of Adult degree pollution. Anisoptera (1) Shallow water of more or less astatic are absent, save for Anax imperator, which nature. Sparse vegetation of Juncus, established territories even at the smallest and like Poa and Lemna, algae, grasses bodies of water. Alopecurus spp. (2) Deep water of permanent nature. Sub- Introduction made Ranun- merged vegetation up by This paper attempts to give a concise survey, culus aquaticus, R. trichophyllus, Pota- with ecological notes, of the dragonfly mogeton natans, Polygonum amphi- small cenoses of very pools, quite a lot of bium, Myriophyllum spicatum, Juncus which be found in the meadows and Lemna and filiform can effusus, spp. algae. Munster. used pasture land around They are (3) Unfenced pools. Vegetation partly as watering places for cattle. Some of these destroyed by trampling cattle. Ex- crements of cattle influence pools are bomb holes of characteristic cir- badly outline. water cular I have been surveying a num- quality. ber of these pools for several years with res- (4) Fenced-in pools with additional vegeta- pect to their dragonfly fauna and vegeta- tion at the water edge, represented tion. by Carex spp., Typha spp., Sparganium Iris In the literature there are only very few erectum, pseudacorus, Alisma plan- ecological notes on the dragonfly fauna of tago-aquatica and meadow grasses. abundance small stagnant water bodies in Central Species composition and in Europe, either natural or artificial. The most the plant communities of course differ. the of small Some with profound approach to ecology pools are completely overgrown meadow pools in Northern Germany similar one plant species, e.g. Ranunculus aquatilis, those considered in is the Lemna. to my own paper, Alopecurus aequalis, or just Phrag- of mites extensive work KREUZER (1940), deal- is not found in any of these pools. also with Odonata. MUNCHBERG No ing bushes or trees are growing at the water recorded 3 in (1956) only species breeding edge ofany of these pools. bomb holes. DUMONT (1971) gave a de- tailed account of the dragonfly fauna of Chemism bomb holes other artificial some among Small pools are distinguished by extreme water bodies in Belgium. Miinchberg and circadian and seasonal changes in the con- Dumont dealt with the cenoses of both centration of certain ions, partly due to FISCHER of larvae and adults, while (1961) photosynthesis, partly as a mere effect in water concentrated on dragonfly larvae small evaporation. However, in some pools in pools Poland. There are some conspicu- considered here, concentration changes are 12 Notul. odonatol., Vol. I, No. 1, pp. 1-16, June 1, 1978 due increased influx Aeshna more markedly to an cyanea (Mull.), Anax imperator of ions after bringing out artificial fertilizer, Leach, Libellula quadrimaculata L., Sym- dung or liquid manure on the surrounding petrum flaveolum (L.), S. vulgatum (L.), S. of land. Coincidence changes in ion concen- sanguineum (Mull.). tration and electric conductivity with agri- It is possible that some other species but cultural procedures could be ascertained regularly reproduce in these pools, never at even large ponds of various size (RU- reach appreciablenumbers of larvae, and are DOLPH, 1978). Out of a greater body of thus easily overlooked. This holds for Ani- chemical data collected over a year’s period soptera e.g. Aeshna grandis (L.) and Cordu- winter of bomb hole (except months) one lia aenea (L.), which in the adult stage do located in meadows, some are listed in Table not establish territories at the pools because I. of the small size and unsuitable vegetation, so that there is nearly no chance to meet Table I. Some data chemical of pool 1. (All them as adults at the pools. for figures ions in mg/1; oxygen concentra- Above all, species number and popula- tion was measured only once in March, tion density at the pools depended on the 1977) more or less astatic nature of the water body. FISCHER (1961) has stressed the fact 1976 1977 that in those astatic ponds she investigated Month 7 8 3 5 6 8 10 in the Lestidae outnumbered the PH 7.5 8.1 7.7 7.6 7.4 7.6 8.1 Poland, nitrite 0.035 0.05 0.022 0.005 0.005 0.04 0.025 Coenagrionidae. Of course the univoltine nitrate 1.77 0.39 0.88 0.16 0.32 0.16 0.29 0.06 ammonia 0.38 0.26 2.10 0.22 0.22 0.18 Lestidae are largely adapted to survive in 0.04 0.04 0.04 phosphate 0.22 - 0.09 0.03 astatic but of sulfate 36 83 79 255 36 waters, as a matter fact, no oxygen 9.36 Lestidae found of the meadow were at any pools within 5 years. This is in contrast to In meadow pools the pH value in most the findings of Fischer, KREUZER (1940), is and cases definitely alkaline, even in times my own observations of Lestidae at of reduced photosynthetic activity. Electric astatic waters of slightly different chemical conductivity is permanently high, signalling character and differing location in the Mun- ster a great amount of ions in solution. Dragon- area. So far no reason can be given for the of from fly larvae are not affected by high ion con- absence Lestidae small meadow Libellula to centrations or rapid concentration changes, pools. depressa L., too, is said but actually nothing is known about the withstand drying up of its habitats, but no larvae have been found. In effect particularly on dragonfly larvae of our region this species is one H2S, NO2, NH3 and NH4, which are rare, and only single male either toxic involved in was ever met at a particular pool. directly or oxygen consuming nitrification processes. These Though occasionally larvae of semivol- ions are surely limiting factors, and their tine species like Pyrrhosoma nymphula, Libellula negative effect is demonstrated at those Aeshna cyanea and quadrimaculata found in unfenced pools, which are polluted with were pools drying up regularly the univoltine cattle excrements and lacking almost any only Sympetrum species are water arthropods. likely to survive in these habitats. Larvae of Sympetrum species and of Libellula quadri- The dragonfly fauna maculata were met with even in pools Larvae of the following eurytopic species devoid of all macrophytes except flooded were found inhabiting small meadow pools: grass. Pyrrhosoma nymphula (Sulz.), Ischnura Pyrrhosoma nymphula, although not elegans (Vander L.), Enallagmacyathigerum confined to narrow ecological limits, does (Charp.), Coenagrion puella (L.), C. pulchel- not by far inhabit all permanent pools with lum (Vander L.), Erythromma najas (Hans.), sufficient vegetation. So far the distribution Notul. odonatol., Vol. I, No. 1, pp. 1-16, June 1, 1978 13 pattern of this species cannot be explained. bers. Of S. flaveolum, S. vulgatum and L. DUMONT (1971) suggested that P. nym- quadrimaculata only a few larvae were phula is expelled from potentialhabitats by caught. competition of Coenagrion pulchellum and The cenosis of the adults is completely but both these Enallagma cyathigerum, different.I elegans dominates here as well, species are only very seldom met with at the followed by C. puella and E. najas, but meadow pools in Westfalia. Here dense Anisoptera are encountered only very sel- with populationsI.of P. nymphula coexist dom, except for A. imperator and a few elegans, C. puella and Erythromma najas. Sympetrum individuals. DUMONT (1971) The latter species colonizes nearly all pools states that A. imperator prefers large water with adequate habitat structure, i.e. floating surfaces and, therefore, does not inhabit the macrophytes. bomb holes investigated by the author, As could be the more diversi- while A. finds sufficient ’’elbow expected, cyanea fied dragonfly cenoses of both larvae and room” even at the smaller bomb holes. On adults are found at less polluted permanent the contrary, in our region, A. imperator pools with great productivity, i.e. dense is the only anisopterous species permanent- in small vegetation and rich arthropod fauna as a ly present the adult stage at very food supply. water bodies like the open meadow pools Two pools with their characteristic and bomb holes, provided that they offer cenosesshall be described in detail. erect growing plants to rest upon, like Typha and Iris. Obviously a pool of about Pool 1 only 5 m radius is of suffic it size to be m a as one Bomb hole of about 5 radius and depth occupied territory by ... imperator At of about 2 m. Protected from cattle. Con- male. one particular pool a male Anax stant water level. Dense vegetation of Jun- was observed on 9 successive days patrolling and the is not cus effusus, Carex pseudocyperus throughout day, but it sure various meadow about half of whether it was the same grasses covers specimen. In A. the water edge, with a few additional our region, cyanea prefers ponds Typha latifolia, Iris pseudacorus, Sparga- surrounded with bushes or trees. nium erectum and Alisma plantago-aquatica. The cenosis of the adult dragonflies is water the - About a third of the surface is cover- Erythromma najas Anax imperator ed with Potamogeton natans and Ranuncu- cenosis of JACOB (1969), which is rather lus trichophyllus.
Load more

Recommended publications
  • Dragonflies and Damselflies in Your Garden
    Natural England works for people, places and nature to conserve and enhance biodiversity, landscapes and wildlife in rural, urban, coastal and marine areas. Dragonflies and www.naturalengland.org.uk © Natural England 2007 damselflies in your garden ISBN 978-1-84754-015-7 Catalogue code NE21 Written by Caroline Daguet Designed by RR Donnelley Front cover photograph: A male southern hawker dragonfly. This species is the one most commonly seen in gardens. Steve Cham. www.naturalengland.org.uk Dragonflies and damselflies in your garden Dragonflies and damselflies are Modern dragonflies are tiny by amazing insects. They have a long comparison, but are still large and history and modern species are almost spectacular enough to capture the identical to ancestors that flew over attention of anyone walking along a prehistoric forests some 300 million river bank or enjoying a sunny years ago. Some of these ancient afternoon by the garden pond. dragonflies were giants, with This booklet will tell you about the wingspans of up to 70 cm. biology and life-cycles of dragonflies and damselflies, help you to identify some common species, and tell you how you can encourage these insects to visit your garden. Male common blue damselfly. Most damselflies hold their wings against their bodies when at rest. BDS Dragonflies and damselflies belong to Dragonflies the insect order known as Odonata, Dragonflies are usually larger than meaning ‘toothed jaws’. They are often damselflies. They are stronger fliers and referred to collectively as ‘dragonflies’, can often be found well away from but dragonflies and damselflies are two water. When at rest, they hold their distinct groups.
    [Show full text]
  • The Impacts of Urbanisation on the Ecology and Evolution of Dragonflies and Damselflies (Insecta: Odonata)
    The impacts of urbanisation on the ecology and evolution of dragonflies and damselflies (Insecta: Odonata) Giovanna de Jesús Villalobos Jiménez Submitted in accordance with the requirements for the degree of Doctor of Philosophy (Ph.D.) The University of Leeds School of Biology September 2017 The candidate confirms that the work submitted is her own, except where work which has formed part of jointly-authored publications has been included. The contribution of the candidate and the other authors to this work has been explicitly indicated below. The candidate confirms that appropriate credit has been given within the thesis where reference has been made to the work of others. The work in Chapter 1 of the thesis has appeared in publication as follows: Villalobos-Jiménez, G., Dunn, A.M. & Hassall, C., 2016. Dragonflies and damselflies (Odonata) in urban ecosystems: a review. Eur J Entomol, 113(1): 217–232. I was responsible for the collection and analysis of the data with advice from co- authors, and was solely responsible for the literature review, interpretation of the results, and for writing the manuscript. All co-authors provided comments on draft manuscripts. The work in Chapter 2 of the thesis has appeared in publication as follows: Villalobos-Jiménez, G. & Hassall, C., 2017. Effects of the urban heat island on the phenology of Odonata in London, UK. International Journal of Biometeorology, 61(7): 1337–1346. I was responsible for the data analysis, interpretation of results, and for writing and structuring the manuscript. Data was provided by the British Dragonfly Society (BDS). The co-author provided advice on the data analysis, and also provided comments on draft manuscripts.
    [Show full text]
  • Dragonf Lies and Damself Lies of Europe
    Dragonf lies and Damself lies of Europe A scientific approach to the identification of European Odonata without capture A simple yet detailed guide suitable both for beginners and more expert readers who wish to improve their knowledge of the order Odonata. This book contains images and photographs of all the European species having a stable population, with chapters about their anatomy, biology, behaviour, distribution range and period of flight, plus basic information about the vagrants with only a few sightings reported. On the whole, 143 reported species and over lies of Europe lies and Damself Dragonf 600 photographs are included. Published by WBA Project Srl CARLO GALLIANI, ROBERTO SCHERINI, ALIDA PIGLIA © 2017 Verona - Italy WBA Books ISSN 1973-7815 ISBN 97888903323-6-4 Supporting Institutions CONTENTS Preface 5 © WBA Project - Verona (Italy) Odonates: an introduction to the order 6 WBA HANDBOOKS 7 Dragonflies and Damselflies of Europe Systematics 7 ISSN 1973-7815 Anatomy of Odonates 9 ISBN 97888903323-6-4 Biology 14 Editorial Board: Ludivina Barrientos-Lozano, Ciudad Victoria (Mexico), Achille Casale, Sassari Mating and oviposition 23 (Italy), Mauro Daccordi, Verona (Italy), Pier Mauro Giachino, Torino (Italy), Laura Guidolin, Oviposition 34 Padova (Italy), Roy Kleukers, Leiden (Holland), Bruno Massa, Palermo (Italy), Giovanni Onore, Quito (Ecuador), Giuseppe Bartolomeo Osella, l’Aquila (Italy), Stewart B. Peck, Ottawa (Cana- Predators and preys 41 da), Fidel Alejandro Roig, Mendoza (Argentina), Jose Maria Salgado Costas, Leon (Spain), Fabio Pathogens and parasites 45 Stoch, Roma (Italy), Mauro Tretiach, Trieste (Italy), Dante Vailati, Brescia (Italy). Dichromism, androchromy and secondary homochromy 47 Editor-in-chief: Pier Mauro Giachino Particular situations in the daily life of a dragonfly 48 Managing Editor: Gianfranco Caoduro Warming up the wings 50 Translation: Alida Piglia Text revision: Michael L.
    [Show full text]
  • Dragonfly Report
    The Dragonflies & Damselflies of Rye Harbour Rye Harbour Fauna and Flora Volume 4 By Chris Bentley Published by East Sussex County Council and The Friends of Rye Harbour Nature Reserve Rye Harbour Nature Reserve 2 Watch Cottages Winchelsea, East Sussex TN36 4LU [email protected] www.WildRye.info February 2010 RYE HARBOUR FLORA & FAUNA Dragonflies & Damselflies RYE HARBOUR FLORA & FAUNA Dragonflies & Damselflies Introduction In 1965 East Sussex County Council published a report on the future development of the East Sussex Coast which included proposals to encourage the establishment of a Nature Reserve over the whole of the 728 hectares (c.1,800 acres) of the Rye Harbour Site This report should of Special Scientific Interest (SSSI). In 1970 the shingle beach, now owned by the Environment Agency , was declared a Local Nature print out in booklet Reserve (LNR) by the County Council, who also appointed a form so that you can Management Committee to administer the LNR. This was the beginning of Rye Harbour Local Nature Reserve. Since then further make your own. land has been added by agreement with neighbouring landowners and the County Council and by purchase of land by the Sussex Wildlife Trust with the help of the Friends of Rye Harbour Print on both sides of Nature Reserve . It is hoped that further areas of the SSSI will become part of the Nature Reserve and so this report covers the 14 sheets of A4 paper. whole area. The present extent of the Nature Reserve includes the seaward shingle ridges extending inland to, and including, the gravel pit known as Ternery Pool and the nearby excavation known as the Quarry (Beach Reserve), a large gravel pit (Castle Water), a large area of meadow land and shingle ridges around Camber Castle (Castle Farm) and a small area of saltmarsh fringing the western bank of the River Rother between Rye Harbour and the river mouth.
    [Show full text]
  • Download Download
    The Distribution and Relative Seasonal Abundance of the Indiana Species of Agrionidae (Odonata: Zygoptera) B. Elwood Montgomery, Purdue University In a previous paper (Montgomery, 1942) the relative seasonal abundance of the adults of the 16 species of Enallagma known from Indiana, based upon the frequency of collection during 41 years (1900- 1940 inclusive) was indicated. That study is extended here to include the remaining 16 species of the family Agrionidae recorded from the state. <I3jXEEEKE> Fig. 1. The range of the flight season (or period of adult life) and the relative seasonal abundance of 16 species of Agrionidae (genera Argia, Nehalen- nia, Amphiagrion, Chromagrion, Ischnura and Anonialagrion ) in Indiana. Col- lections made from 1900 to 1940 inclusive were tabulated by thirds of months and the graphs constructed from the resulting frequency distributions. Numbers near each bar indicate the number of collections of each species in each third of a month ; where no number is given the number of collections is one. 179 180 Indiana Academy of Science Records of almost all Odonata collected or observed in Indiana since 1900 have been preserved in the note books of the late E. B. Williamson and of the author. The records for the species of the genera Argia, Nehalennia, Amphiagrion, Chromagrion, Ischnura, and Anomalagrion have been tabulated and the accompanying chart (Figure 1) indicates the relative abundance of the different species throughout the season of adult flight. As this study applies only to adults, all references to seasonal range and abundance in this paper refer to the period of adult flight. The records of captures (or observations) were tabulated by thirds of months and the time-frequency graph for each species was con- structed by plotting the frequency for each third at the midpoint (5th, 15th and 25th of the month, respectively) of the third of the time axis.
    [Show full text]
  • ARTHROPODA Subphylum Hexapoda Protura, Springtails, Diplura, and Insects
    NINE Phylum ARTHROPODA SUBPHYLUM HEXAPODA Protura, springtails, Diplura, and insects ROD P. MACFARLANE, PETER A. MADDISON, IAN G. ANDREW, JOCELYN A. BERRY, PETER M. JOHNS, ROBERT J. B. HOARE, MARIE-CLAUDE LARIVIÈRE, PENELOPE GREENSLADE, ROSA C. HENDERSON, COURTenaY N. SMITHERS, RicarDO L. PALMA, JOHN B. WARD, ROBERT L. C. PILGRIM, DaVID R. TOWNS, IAN McLELLAN, DAVID A. J. TEULON, TERRY R. HITCHINGS, VICTOR F. EASTOP, NICHOLAS A. MARTIN, MURRAY J. FLETCHER, MARLON A. W. STUFKENS, PAMELA J. DALE, Daniel BURCKHARDT, THOMAS R. BUCKLEY, STEVEN A. TREWICK defining feature of the Hexapoda, as the name suggests, is six legs. Also, the body comprises a head, thorax, and abdomen. The number A of abdominal segments varies, however; there are only six in the Collembola (springtails), 9–12 in the Protura, and 10 in the Diplura, whereas in all other hexapods there are strictly 11. Insects are now regarded as comprising only those hexapods with 11 abdominal segments. Whereas crustaceans are the dominant group of arthropods in the sea, hexapods prevail on land, in numbers and biomass. Altogether, the Hexapoda constitutes the most diverse group of animals – the estimated number of described species worldwide is just over 900,000, with the beetles (order Coleoptera) comprising more than a third of these. Today, the Hexapoda is considered to contain four classes – the Insecta, and the Protura, Collembola, and Diplura. The latter three classes were formerly allied with the insect orders Archaeognatha (jumping bristletails) and Thysanura (silverfish) as the insect subclass Apterygota (‘wingless’). The Apterygota is now regarded as an artificial assemblage (Bitsch & Bitsch 2000).
    [Show full text]
  • Argia the News Journal of the Dragonfly Society of the Americas
    ISSN 1061-8503 TheA News Journalrgia of the Dragonfly Society of the Americas Volume 22 17 December 2010 Number 4 Published by the Dragonfly Society of the Americas http://www.DragonflySocietyAmericas.org/ ARGIA Vol. 22, No. 4, 17 December 2010 In This Issue .................................................................................................................................................................1 Calendar of Events ......................................................................................................................................................1 Minutes of the 2010 Annual Meeting of the Dragonfly Society of the Americas, by Steve Valley ............................2 2010 Treasurer’s Report, by Jerrell J. Daigle ................................................................................................................2 Enallagma novaehispaniae Calvert (Neotropical Bluet), Another New Species for Arizona, by Rich Bailowitz ......3 Photos Needed ............................................................................................................................................................3 Lestes australis (Southern Spreadwing), New for Arizona, by Rich Bailowitz ...........................................................4 Ischnura barberi (Desert Forktail) Found in Oregon, by Jim Johnson ........................................................................4 Recent Discoveries in Montana, by Nathan S. Kohler ...............................................................................................5
    [Show full text]
  • Priority Site Assessments Assess the Value of a Site for Dragonflies
    Priority Site Assessments Assess the value of a site for Dragonflies Priority Site Criteria Follow the flow chart to determine whether your site qualifies as a Priority Site. Non- Priority Site Possible Priority Site Probable Priority Site Priority Site Site of Local Importance Site of National Importance Nationally Important Species List Azure Hawker, Aeshna caerulea Scarce Chaser, Libellula fulva Brilliant Emerald, Somatochlora metallica Scarce Emerald Damselfly, Lestes dryas Common Clubtail, Gomphus vulgatissimus Southern Damselfly, Coenagrion mercuriale Northern Emerald, Somatochlora arctica Small Red Damselfly, Ceriagrion tenellum Norfolk Hawker, Aeshna isosceles Variable Damselfly, Coenagrion pulchellum Northern Damselfly, Coenagrion hastulatum White-faced Darter, Leucorrhinia dubia Scarce Blue-tailed Damselfly, Ischnura pumilio Locally Important Species List and Diversity Criteria The diversity criteria is the minimum number of species that need to have been recorded within the site, within the last 10 years, for it to qualify. Counties Locally Important Species Diversity criteria Cornwall White-legged Damselfly, Platycnemis pennipes 11 Isles of Scilly Ruddy Darter, Sympetrum sanguineum Devon White-legged Damselfly, Platycnemis pennipes 14 Red-eyed Damselfly, Erythromma najas Hairy Dragonfly, Brachytron pratense Downy Emerald, Cordulia aenea Ruddy Darter, Sympetrum sanguineum Dorset White-legged Damselfly, Platycnemis pennipes 14 Red-eyed Damselfly, Erythromma najas Downy Emerald, Cordulia aenea Somerset Common Hawker, Aeshna juncea
    [Show full text]
  • Index to Contents
    Index to Contents Author(s) Title Year Vol Pages Holland, Sonia Dragonfly Survey Reports – 1. Gloucestershire 1983 1 (1) 1-3 Butler, Stephen Notes on finding larvae of Somatochlora arctica (Zetterstedt) in N. W. Scotland 1983 1 (1) 4-5 Winsland, David Some observations on Erythromma najas (Hansemann) 1983 1 (1) 6 Merritt, R. Is Sympetrum nigrescens Lucas a good species? 1983 1 (1) 7-8 Vick, G. S. Is Sympetrum nigrescens Lucas a good species? 1983 1 (1) 7-8 Merritt, R. Coenagrion mercuriale (Charpentier) with notes on habitat 1983 1 (1) 9-12 Chelmick, D. G. Observations on the ecology and distribution of Oxygastra curtisii (Dale) 1983 1 (2) 11-14 Khan, R. J. Observations of Wood-mice (Apodemus sylvaticus) and Hobby (Falco subbuteo) feeding on dragonflies 1983 1 (2) 15 Marren, P. R. Scarce Species Status Report 2. A review of Coenagrion hastulatum (Charpentier) in Britain 1983 1 (2) 16-19 Merritt, R. Is Sympetrum nigrescens Lucas a good species? 1983 1 (2) 16-19 Mayo, M. C. A. Coenagrion mercuriale (Charpentier) on the flood plains of the River Itchen and River Test in Hampshire 1983 1 (2) 20-21 Welstead, A. R. Coenagrion mercuriale (Charpentier) on the flood plains of the River Itchen and river Test in Hampshire 1983 1 (2) 20-21 Kemp, R. G. Notes and observations on Gomphus vulgatissimus (Linnaeus) on the river Severn and River Thames 1983 1 (2) 22-25 Vick, G. S. Notes and observations on Gomphus vulgatissimus (Linnaeus) on the river Severn and River Thames 1983 1 (2) 22-25 Corbet, P.
    [Show full text]
  • Shropshire Dragonfly News 2018
    Shropshire (VC40) Dragonfly Newsletter Spring 2018 Sue Rees Evans Introduction Happy New Year and a big THANK YOU to all who were out and about in 2017 recording Shropshire dragonflies. It was a mixed year weather wise with a very promising start followed by periods where things ‘failed to take off.’ Despite this we accumulated around 700 records from over 70 recorders. Interestingly 24% of the records were entered via iRecord –a further increase on the 21% last year (and 13% in 2015). Again the data contained a good number of exuviae records covering 9 different species. This was due in no small part to the Clubtail Count 2017 organised by David Tompkins and Genevieve Dalley of the British Dragonfly Society. They had some excellent results (see the individual reports) and again illustrated how a structured survey encouraging people to look for something specific can result in many other valuable species records. The Shropshire Dragonflies Website and the Shropshire Dragonfly Watch flight season Keeping a close eye on White-legged Damselflies blog also had another successful Photo: D. Williams year enabling us all to stay informed of the comings and goings throughout the year. Again your photos were spectacular and I have included as many stunning examples as possible throughout this newsletter! I never cease to be amazed how a good photograph can illustrate so much that the naked eye is oblivious to. No new Shropshire species to report this year, but I am very pleased to announce a new Shropshire Dragonfly County Recorder. Vicky Nall will be taking over the role from mid February onwards and you can read more about Vicky later in this newsletter.
    [Show full text]
  • Ohio Damselfly Species Checklist
    Ohio Damselfly Species Checklist Ohio has ~51 species of damselflies (Zygoptera). This is a statewide species checklist to encourage observations of damselflies for the Ohio Dragonfly Survey. Please submit photo observations to iNaturalist.org. More information can be found on our survey website at u.osu.edu/ohioodonatasurvey/ Broad Winged Damselflies (Calopterygidae) 1 Appalachian Jewelwing Calopteryx angustipennis 2 River Jewelwing Calopteryx aequabilis State Endangered 3 Ebony Jewelwing Calopteryx maculata 4 American Rubyspot Hetaerina americana 5 Smoky Rubyspot Hetaerina titia Pond Damselflies (Coenagrionidae) 6 Eastern Red Damsel Amphiagrion saucium 7 Blue-fronted Dancer Argia apicalis 8 Seepage Dancer Argia bipunctulata State Endangered 9 Powdered Dancer Argia moesta 10 Blue-ringed Dancer Argia sedula 11 Blue-tipped Dancer Argia tibialis 12 Dusky Dancer Argia translata 13 Violet Dancer Argia fumipennis violacea 14 Aurora Damsel Chromagrion conditum 15 Taiga Bluet Coenagrion resolutum 16 Turquoise Bluet Enallagma divagans 17 Hagen's Bluet Enallagma hageni 18 Boreal Bluet Enallagma boreale State Threatened 19 Northern Bluet Enallagma annexum State Threatened 20 Skimming Bluet Enallagma geminatum 21 Orange Bluet Enallagma signatum 22 Vesper Bluet Enallagma vesperum 23 Marsh Bluet Enallagma ebrium State Threatened 24 Stream Bluet Enallagma exsulans 25 Rainbow Bluet Enallagma antennatum 26 Tule Bluet Enallagma carunculatum 27 Atlantic Bluet Enallagma doubledayi 1 28 Familiar Bluet Enallagma civile 29 Double-striped Bluet Enallagma basidens
    [Show full text]
  • Zygoptera: Coenagrionidae) Has an Andromorphic Female, and Another Suggestion to Modify the Terminology of Female Color Polymorphism in Odonata
    International Journal of Odonatology 2 (1): 101-103, 1999. © 1999 Backhuys Publishers. 101 ISCHNURA PERPARVA MCLACHLAN (ZYGOPTERA: COENAGRIONIDAE) HAS AN ANDROMORPHIC FEMALE, AND ANOTHER SUGGESTION TO MODIFY THE TERMINOLOGY OF FEMALE COLOR POLYMORPHISM IN ODONATA DENNIS R. PAULSON Slater Museum of Natural History, University of Puget Sound, Tacoma, WA 98416 U.S.A.- Email: [email protected] This paper is dedicated to Philip S. Corbet on the occasion of his 70th birthday. Received 30 June 1998; revised 22 Februari 1999; accepted 22 March 1999 Key words: coloration, damselfly, /schnura perparva, Odonata, polymorphism, Zygoptera Polymorphism in lschnura perparva There is considerable theoretical interest in the polymorphism shown by females of some species ofOdonata (Johnson, 1975 Robertson, 1985 Hinnekint, 1987 Cordero, 1992; Fincke 1994). This polymorphism is especially conspicuous in many species of lschnura, in which it is correlated with other traits (Robinson & Allgeyer 1996). Robinson & Allgeyer (1996) and Westfall & May (1996) listed all 12 North American /schnura species as polymorphic, with the exception of /. demorsa, /. hastata, I. perparva, and /. posita, which were considered monomorphic. However, I recently examined all 235 female /. perparva in my collection and found two andromorphic individuals, along with 16 immature (orange) gynomorphic, 216 mature (pruinose ), and one clearly intermediate between the last two. The andromorphic females were collected in Washington state, from a pond 0.5 mi E Beverly, Grant Co., 5 August 1972, and a lake west of Lower Hampton Lake, Grant Co., 27 July 1973. The andromorphic females, both quite young, differ from my sample of gynomorphic immatures and the detailed description of the female by Kennedy (1915) in three ways, involving both color and pattern.
    [Show full text]