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C'est un lézard de forme élancée, espèce extrêmement polymorphe, avec une variabilité extraordinaire de l'écaillure, une coloration très variable, brun, gris ou même verdâtre. La face ventrale est claire, jaune, bleu ou rougeâtre. La gorge est mouchetée de noir. Le mâle mesure 20 cm, exceptionnellement 25 cm, la femelle 18 cm. On ne peut pas déterminer son sexe tant qu'il n'a pas atteint la maturité. La queue de ce lézard casse facilement (autotomie), lui permettant ainsi d'échapper à des prédateurs. En effet, l'extrémité « perdue » continue à s'agiter ce qui constitue un leurre vis-à-vis de l'attaquant. Une queue de remplacement repousse progressivement mais elle est dépourvue d'écailles, et elle est uniformément gris sombre. Parfois elle peut repousser double. On peut observer ce lézard toute l'année dans le sud de la France.
I decided what my Teapotty! needed was some RGB LED heart indicators to show when and where Teapotty had moved over 180 degrees, so I added some BlinkMs (addressable RGB LEDs), some more code and then made some polymorph hearts.
Teapotty! is a teapot sitting on a servo which takes readings from a magnetometer which is influenced by neodymium magnets in a cup. The magnetometer takes the reading from the north position, plays a bit of something similar to the Tetley Tea tune and then moves to a new position - where the teacup moves to.
Teapotty! is an interactive electronic teapot I've constructed for the Chi-TEK tea party event & exhibition of tech teapots at the V&A in Sept 11.
Der Große Mormone (Papilio memnon) gehört innerhalb der Familie der Ritterfalter (Papilionidae) zur Gattung Papilio. Im Englischen wird der Große Mormone great mormon genannt.
Der Große Mormone erreicht eine Spannweite von etwa 120,0 bis 150,0 Millimeter. Die Weibchen sind sehr polymorph und viele von ihnen imitieren einen ungenießbaren Schmetterling. Bei dem Weibchen sind die oberen Flügel schwärzlich gefärbt und mit zahlreichen gräulich-aschefarbenen Längsstrahlen markiert. Des Weiteren weist jeder von ihnen einen großen dreieckigen blutroten oder ockerfarbenen bis gelblichen Fleck an der Basis auf. Im Bereich der unteren Flügel zeigt sich mit einer weißen Färbung eng eingefaßter Hinterrand. Ferner zeigt sich ein breites weißes Band und eine Reihe von eiförmigen oder abgerundeten tief-schwarzen Flecken. Der Körper des Weibchens selbst ist schwarz und der Prothorax ist mit mehreren weißen Punkten markiert. Das Männchen ist gänzlich ohne basale rote Flecken und die dunkle Grundfarbe ist eine grünliche Reflexion. Die oberen Flügel weisen einen roten oder ockerfarbenen Fleck an der Basis der unteren Seite auf. Ferner zeigben sich im unteren Bereich der Flügel vier kleine rote Flecken, sonst die unteren Flügel vorne tiefschwarz und hinten aschgrau. Die aschgrauen Partien sind mit zwei Reihen von tiefschwarzen abgerundeten Flecken besetzt und im Bereich des Analwinkels zeigen sich kreisförmige gelbe Flecken.
Der Große Mormone besucht gerne Blumen wie Weihnachtssterne (Euphorbia pulcherrima), Jasminum, Wandelröschen (Lantana), Blumenrohr (Canna) und Salbei (Salvia).
Angiopteris itoi (W.C. Shieh) J.M. Camus, Proc. Int. Symp. Pterid. (1988) 35. 1988 [1989].
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Synonyms:
Archangiopteris itoi W.C. Shieh, J. Jap. Bot. 45(6): 165, f. 2-3. 1970.
family Marattiaceae 合囊蕨科 リュウビンタイ科
Chinese name: 伊藤氏原始觀音座蓮
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Endemic in Taiwan. Critically endangered species, very rare. Habitat in broadleaf forest (Knapp, 2011).
Distributed in Wulai (烏來) in New Taipei City, and Lianhuachi (or Lianhwachi, 蓮華池) in Nantou county. However, the Lianhuachi population was extinct, and the Wulai population only have about 18 individuals (Hsu et al., 2000).
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An cultivated individual at Yun Hsien Resort, Wulai area, New Taipei City, Taiwan. There is also the place which the native population has been found.
攝於台灣 新北市 烏來區 雲仙樂園。
2013/07/29
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References:
1. Hsu, T.W., S.J. Moore, and T.Y Chiang (2000) Low RAPD polymorphism in Archangiopteris itoi, a rare and endemic fern in Taiwan. Bot. Bull. Acad. Sin. 41: 15-18.
2. Knapp,R. (2011) Ferns and fern allies of Taiwan. KBCC press and Yuan-Liou publishing, Taipei, Taiwan.
3. 郭城孟 (2001) 蕨類圖鑒1基礎常見篇. 遠流出版事業股份有限公司, 台北.
4. Flora of Taiwan, 2nd ed.: tai2.ntu.edu.tw/ebook/ebookpage.php?volume=1&book=Fl....
5. Plants of Taiwan: tai2.ntu.edu.tw/PlantInfo/species-name.php?code=107%20002...
6. Tropicos: www.tropicos.org/Name/50050352
A couple of weeks ago Museums and Public relations department had an away day at the Institute of Making.
Pewter casting with cuttlefish.
We just set up our new Raman and Mark's already underway analyzing samples.
It's optimized design enables high throughput for fast imaging of samples. Detailed chemical images from a sample’s Raman spectrum can provide information on individual chemical components, polymorphs and variations in crystallinity.
Aragonite helictites from Austria. (Wayne State University collection, Detroit, Michigan, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 6100 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
The carbonate minerals all contain one or more carbonate (CO3-2) anions.
Aragonite has the same chemistry as calcite - it is calcium carbonate (CaCO3). However, aragonite has a different molecular structure - the atoms are packed differently. Different minerals having the same chemical formula are called "polymorphs" (another good example is graphite and diamond - both are carbon, C).
Unlike calcite, aragonite forms crystals in the orthorhombic class. Many aragonite crystals are acicular (needle-like) or pseudohexagonal. The latter is the result of six orthorhombic prisms growing parallel to each other. The sample seen here is a radiating cluster of pseudohexagonal, cyclic-twinned aragonite masses.
Aragonite is slightly harder than calcite, at H=3.5 to 4, occurs in many colors, and easily bubbles in acid. Aragonite is a little bit more dense than calcite, due to closer packing of atoms.
Most modern seashells and coral skeletons are composed of the aragonite. Whitish-colored lime sand beaches in the world are aragonitic. Occasionally, "whitings" are seen in shallow, warm ocean environments. Whitings (cloudy, milky seawater) turn out to have numerous tiny, hair-like needles of aragonite.
In the rock record, aragonitic or aragonite-rich sediments convert to calcite over time. Cenozoic-aged carbonate sedimentary rocks are often aragonitic. Mesozoic- and Paleozoic-aged carbonates are almost always calcitic. Many ancient fossils have had their aragonitic shells dissolved away. Ancient shells that were originally calcitic are often still well preserved.
The specimen seen here consists of twisted aragonite masses called helictites, a type of speleothem ("cave formation"). Such aragonitic helictites are sometimes referred to using the silly and non-informative nickname "flos ferri".
Locality: unrecorded / undisclosed site at or near the town of Eisenerz, northern Styria, central Austria
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Photo gallery of aragonite:
A butterfly is any of several groups of mainly day-flying insects of the order Lepidoptera, the butterflies and moths. Like other holometabolous insects, butterflies' life cycle consists of four parts, egg, larva, pupa and adult. Most species are diurnal. Butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. Butterflies comprise the true butterflies (superfamily Papilionoidea), the skippers (superfamily Hesperioidea) and the moth-butterflies (superfamily Hedyloidea). All the many other families within the Lepidoptera are referred to as moths.
Butterflies exhibit polymorphism, mimicry and aposematism. Some, like the Monarch, will migrate over long distances. Some butterflies have evolved symbiotic and parasitic relationships with social insects such as ants. Butterflies are important economically as agents of pollination. The caterpillars of some butterflies eat harmful insects. A few species are pests because in their larval stages they can damage domestic crops or trees. Culturally, butterflies are a popular motif in the visual and literary arts.
Phylogenetic analysis of human and bovine derived Mycobacterium avium subspecies paratuberculosis.
Neighbour-joining phylogenetic tree based on single nucleotide polymorphisms (SNPs) of Mycobacterium avium subspecies paratuberculosis isolates derived from animal and bovine hosts. The ovine derived isolate CLIJ361 was omitted from this analysis due to its significant genetic divergence from the other isolates.
Melanistic jaguars are informally known as black panthers, but (as with all forms of polymorphism) they do not form a separate species
A melanistic jaguar is a color morph which occurs at about 6% frequency in populations.
Color morphism occurs in the species. A near-black melanistic form occurs regularly. Jaguars with melanism appear entirely black, although their spots are still visible on close examination.
The black morph is less common than the spotted form but, at about six percent of the population, it is several orders of magnitude above the mutation rate. Hence, it is being supported by selection.
On Origin, History and Infraspecific Variation;
This species was formed at least before 30,000 years ago, during the last glaciation (called the 'Weichselian' in northern Europe or the 'Würm' around the Alps), while cro-magnons were still hunting cave bears and hyenas and making sweet love to the last Neanderthals in Europe. It is an allotetraploid (4n), a hybrid which has mutated to have double the amount of chromosomes. Its original seed parent (the 'mother') was D. saccifera, a diploid (2n), the original pollen parent ('dad') was D. incarnata, also a diploid (2n). Dactylorhiza species hybridize quite often, in northwestern Europe, a swarm of similar allotetraploid species exist, all which share a similar original cross. Most of the allotetraploids are fuschii x. incarnata, or maculata x. incarnata (these are usually classed as subspecies under D. majalis); maculata is itself an old autotetraploid of fuschii. D. praetermissa is the only saccifera x. incarnata, but saccifera is itself very closely related to fuschii, a southern sister group with a more Mediterranean distribution, so the praetermissa plants are extremely similar to the majalis group.
But the story gets much more complicated than this due to two factors: multiple hybridization and introgression.
Many of these allotetraploids probably arose a number of times, in multiple hybridisation events, with subsequent populations perhaps later ad-mixing to varying degrees in different localities. This would mean that the varying species in the majalis complex are largely artificial; based on shared sets of particular phenotypic or ecological characteristics, but with local populations each potentially having a divergent genetic history.
For example, British praetermissa seem to share a great deal of genetics with local forms of fuschii....
Swedish
Belgian
But the story gets even more complicated than that. These allotetraploids also readily hybridize with each other and their original parent species; and these hybrids can back-cross or hybridize again with other members of the complex (i.e. 4n x. 2n = 3n --> 3n x. 4n --> 4n, for example), thus there is some gene-flow between species, so that particular genotypes get more represented in a particular genepool than the original hybrid would warrant. This is called 'introgression'. This gene-flow is not completely equivalent in Dactylorhiza, but is in fact often directional; 'asymmetrical'.
For example, most hybrids always have fuschii/maculata (fuschii s.l.) as seed-parent; and there seems to be is a higher proportion of of gene-flow from incarnata into fuschii s.l.
reticulate introgression/asymmetrical hybridization vs. multiple hybridization
Both processes bring new genetic material into the various allotetraploid lineages.
relatively common vs. quite rare.
The reason why I now think the variety junialis has taxonomic validity is because of the asymmetrical introgression and/or multiple hybridization events; these evolutionary processes mean that the species can better be seen as a complex of local variants, with taxonomical value (need to call 'em something) and conservation signifigance. For example, Nordic populations of allotetraploids of the majalis complex contain haplotypes derived from but no longer present in their parent populations, hence retaining genetic diversity any new polyploid hybrid could no longer regain; thus different Dutch varieties of praetermissa could indeed be significantly divergent from each other and their original parent populations. Not only that, study has also shown that in Estonia and Sweden varieties have specific ecological niches and plant associations; where varieties grow together, the ranges of micro-habitats and conditions become more narrow. This is a clear sign of ongoing speciation.
Note that another isolation mechanism producing reproductive isolation or barriers to gene-flow is divergent flowering times in the different varieties, in the Netherlands junialis flowers a week later than the nominate type.
millions of seeds, pre-glacial hybrid, a mistake occurred during meiosis;
-reticulate introgression/asymmetrical hybridization vs. multiple hybridization events?
-Seed-parent (female) was fuchsii s.l.?
-D. saccifera (2n, Medd. sister tax. to fuschii) x. incarnata (Devos et al. [2006], see also Hedrén [2001], Bateman and Denholm [2003], Devos et al. [2003], Nordström [2008])., while D. majalis = D. fuchsii s.str x. D. incarnata.
-treat all allotetraploid taxa as subspecies of D. majalis as suggested by Pedersen et al. (2003).
-has been looked at via plastids (Pillon), cpDNA, nrDNA, chloroplast (Devos) and allozyme variation (Hedrén).
Synonymy:
* Orchis praetermissa Druce (1914) (Basionym)
* Orchis incarnata var. integrata E.G. Camus ex Fourcy (1891)
* Orchis wirtgenii Höppner (1916)
* Orchis praetermissa var. macrantha Sipkes (1921)
! * Orchis latifolia var. junialis Verm. (1933)
! * Orchis pardalina Pugsley (1934)
* Dactylorchis praetermissa (Druce) Verm. (1947)
* Dactylorhiza wirtgenii (Höppner) Soó (1962)
* Dactylorhiza praetermissa ssp. integrata (E.G. Camus ex Fourcy) Soó (1962)
! * Dactylorhiza majalis var. junialis (Verm.) Senghas (1968)
! * Dactylorhiza praetermissa var. junialis (Verm.) Senghas (1968)
* Dactylorhiza majalis ssp. praetermissa (Druce) D.M. Moore & Soó (1978)
* Dactylorhiza incarnata ssp. praetermissa (Druce) H. Sund. (1980)
* Dactylorhiza majalis var. praetermissa (Druce) R.M. Bateman & Denholm (1983)
! * Dactylorhiza majalis var. macrantha (Sipkes) R.M. Bateman & Denholm (1983)
* Dactylorhiza integrata (E.G. Camus ex Fourcy) Aver. (1984)
! * Dactylorhiza pardalina (Pugsley) Aver. (1986)
! * Dactylorhiza praetermissa var. maculosa D. Tyteca & Gathoye (1990)
* Dactylorhiza praetermissa var. integrata (E.G. Camus ex Fourcy) D.Tyteca & Gathoye (1993)
! * Dactylorhiza praetermissa f. junialis (Verm.) P.D.Sell (1996)
Name Usage: Kew [2003], Flora Belg., Huekels [2005], PLANTS, Flora Ireland [], Tropicos, FNA, Canada
References:
Note these papers do not necessarily agree, and must be looked at in chronological order.
'The Evolution of Dactylorhiza (Orchidaceae) Allotetraploid Complex: Insights from nrDNA sequences and cpDNA PCR-RFLP data' by Devos et al. [2006],
'Allotetraploid Nature of Dactylorhiza praetermissa (Orchidaceae) Confirmed' by Hedrén [1996],
'Patterns of Chloroplast diversity among western European Dactylorhiza species (Orchidaceae)' by Devos et al. [2003],
'Genetic differentiation and postglacial migration of the Dactylorhiza majalis ssp. traunsteineri/lapponica complex into Fennoscandia' by Nordström & Hedrén [2008],
'Amplified fragment length polymorphisms (AFLP) reveal details of polyploid evolution in Dactylorhiza (Orchidaceae)' by Hedrén et al. [2001].
Also there are more relevant papers (and books) by Bateman, Pillon, Nordström, Hedrén, Ståhlberg, Delforge, Pridgeon, Pedersen, Tyteca and Devos
A couple of weeks ago Museums and Public relations department had an away day at the Institute of Making.
Zoe taking about the Materials Library.
LAT:Medicago polymorpha
NO:Snegleskolm var.
ENG:Toothed medick
SP:Carretón
DE:Schneckenklee
Sted/Place:Bel Air, Estepona, Malaga
Dato/Date:03 2010
Str/Size:15-50 cm (Ofte krypende eller hengende)
Blomstring/Flowering:Januar-april (1-4)
Habitat:Gressletter, urbane strøk, hager, balkongkasser
Man trenger ikke gå lenger enn til balkongkassen for å finne denne lille varianten av gule erteblomster. Den kan bli et ganske gjenstridig ugress i blomsterkrukker og terrassekasser. Røttene sitter godt festet til jorden og mange har også sikkert fått følt de piggete fruktene som fester seg til klær. Men for de som har feriehus og ikke noe tilsyn så er denne en dekorativ plante allerede tidlig på våren. Blomstene er knøttesmå gule og tiriltungeaktige. Bladene er brede tynne og spadeformede med små pigger eller hår ytterst.
Shortcuts to All 20 Morphs:-
01. Green Fingers (Laura-Kate Draws) | 02. The Starry Night (Glen Brooks) | 03. Timeless (Roy Meats) | 04. Meandering Morph (RP Roberts) | 05. Mr Create (Jenny Leonard) | 06. Not So Handy Man (Lei-Mai LeMaow) | 07. Morpheus (Jodie Silverman) | 08. Morph and Friends (Jessica Perrin) | 09. Metamorphosis (Donna Newman) | 10. Polymorphism (Sue Gutherie) | 11. Morph in the Jungle (Amanda Quellin) | 12. Astromorph (Megan Heather Smith-Evans) | 13. Tiger Morph (Sandra Russell) | 14. Mighty Morph (Steve Johnson) |15. Wildermorph (Jina Gelder) | 16. Flora (Lisa Kirkbride) | 17. Tesselate (Jim Edwards) | 18. Fish Ahoy (Ali Elly Design) | 19. A Taste of What's to Come (Emily Ward) | 20. Morph-Code (Glen Brooks)
The 56 Full Sized Morphs Are:
01 Blaze a Trail | 02 Pearly King Morph | 03 The Messenger Morph | 04 The Power of Morphing Communication | 05 Morph Over, There's Room for Two! | 06 Morph into the Piñataverse | 07 Morpheus | 08 Apart Together | 09 London Parklife | 10 On Guard | 11 Mr Create | 12 Morph's Inspirational Dungarees | 13 Cactus Morph | 14 Forget-Me-Not | 15 Gingerbread Morph I 16 Totally Morphomatic! | 17 Dance-off Morph I 18 The Bard I 19 Mondrian Morph | 20 Morph Whizz Kidz Argonaut | 21 It's Raining Morphs! Halleujah! | 22 Messy Morph | 23 I Spy Morph | 24 Astromorph | 25 Make Your Mark | 26 Roll With It | 27 Morph and Friends Explore London | 28 Tartan Trailblazer | 29 London Collage | 30 Peace Love and Morph | 31 Midas Morph | 32 Freedom | 33 Good Vibes | 34 Tiger Morph | 35 Maximus Morpheus Londinium | 36 Chocks Away! | 37 Morph! It's the Wrong Trousers! | 38 Diverse-City | 39 Apples and Pears | 40 Morphlowers Please! | 41 Cyborg Morph | 42 Pride Morph | 43 The London Man | 44 Looking After the Ocean | 45 Rock Star! | 46 Wheelie | 47 Gentlemorph | 48 Polymorphism | 49 Whizz Bang! | 50 Stay Frosty | 51 Mmmmmmmoprh! | 52 Swashbuckler | 53 Morph Target | 54 Canary Morph | 55 Morph the Yeoman Guard | 56 Fish Ahoy!
The 23 Mini Morphs Are:
01 Neville | 02 Messy Morph | 03 Meta-MORPH-osis | 04 Morley the Morph - Ready to Board | 05 Near and Far | 06 Bright Ideas | 07 Creativity Rocks! | 08 Growing Together | 10 Many Hands Make Valence | 11 Mr. Tayo Shnubbub 'The Wellbeing Hero' | 12 Captain Compass I 13 Hands-On & Hands-Up | 14 This is Us | 15 The Adventures of Morph | 16 Our School | 17 Riverside Spirit | 18 Morpheby | 19 GRIT | 20 Happiness is an Inside Job | 21 Growing Together in Learning and in Faith | 22 Look for the Light I 23 Bringing Great Energy and Spirit to Make Things Happen
Location: Butterflies Garden, Mandai Zoo. SINGAPORE
A butterfly is an insect of the order Lepidoptera. Like all Lepidoptera, butterflies are notable for their unusual life cycle with a larval caterpillar stage, an inactive pupal stage, and a spectacular metamorphosis into a familiar and colourful winged adult form. Most species are day-flying so they regularly attract attention. The diverse patterns formed by their brightly coloured wings and their erratic yet graceful flight have made butterfly watching a fairly popular hobby.
Butterflies comprise the true butterflies (superfamily Papilionoidea), the skippers (Superfamily Hesperioidea) and the moth-butterflies (Superfamily Hedyloidea). Butterflies exhibit polymorphism, mimicry and aposematism. Some are known to migrate over large distances. Some butterflies have evolved symbiotic and parasitic relationships with social insects such as ants. Butterflies are important economically as one of the major agents of pollination. In addition, a number of species are pests, because they can damage domestic crops and trees.
Culturally, butterflies are a popular motif in the visual and literary arts.
Source from Wikipedia: en.wikipedia.org/wiki/Butterfly
Shortcuts to All 20 Morphs:-
01. Green Fingers (Laura-Kate Draws) | 02. The Starry Night (Glen Brooks) | 03. Timeless (Roy Meats) | 04. Meandering Morph (RP Roberts) | 05. Mr Create (Jenny Leonard) | 06. Not So Handy Man (Lei-Mai LeMaow) | 07. Morpheus (Jodie Silverman) | 08. Morph and Friends (Jessica Perrin) | 09. Metamorphosis (Donna Newman) | 10. Polymorphism (Sue Gutherie) | 11. Morph in the Jungle (Amanda Quellin) | 12. Astromorph (Megan Heather Smith-Evans) | 13. Tiger Morph (Sandra Russell) | 14. Mighty Morph (Steve Johnson) |15. Wildermorph (Jina Gelder) | 16. Flora (Lisa Kirkbride) | 17. Tesselate (Jim Edwards) | 18. Fish Ahoy (Ali Elly Design) | 19. A Taste of What's to Come (Emily Ward) | 20. Morph-Code (Glen Brooks)
2. Genomic DNA from rice plants regenerated from callus cultures maintained for long periods (67 d) reveals not only more DNA polymorphism but significant DNA rearrangement. Genomic DNA was digested with Hin dIII and Southern analyzed with the 3-kb Hin d III fragment of the actin gene. C = control.
books.google.com.ph/books/irri?id=B4KrnP8cMQAC&lpg=PA...
Part of the image collection of the International Rice Research Institute (IRRI)
"Turkey tail" marcasite from Wisconsin, USA.
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 6000 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
The sulfide minerals contain one or more sulfide anions (S-2). The sulfides are usually considered together with the arsenide minerals, the sulfarsenide minerals, and the telluride minerals. Many sulfides are economically significant, as they occur commonly in ores. The metals that combine with S-2 are mainly Fe, Cu, Ni, Ag, etc. Most sulfides have a metallic luster, are moderately soft, and are noticeably heavy for their size. These minerals will not form in the presence of free oxygen. Under an oxygen-rich atmosphere, sulfide minerals tend to chemically weather to various oxide and hydroxide minerals.
Marcasite is an iron sulfide mineral, FeS2, which is the same chemical formula as pyrite. Different minerals having the same chemical formula are called polymorphs. Other examples of polymorphs are graphite-diamond (both C) and calcite-aragonite (both CaCO3). Pyrite and marcasite both have a metallic luster, a brassy gold color, and a dark gray to black streak. They both lack cleavage, and they have the same hardness (H = 6 to 6.5). Marcasite tends to have a paler brass color than pyrite. Some marcasites are almost silvery-colored.
How does one visually distinguish marcasite from pyrite? Apart from color, marcasite crystals are typically plates, or sharp & pointed, and marcasite tends to twin, resulting in cockscomb masses (www.mindat.org/photo-408969.html). Marcasite also more readily breaks down into whitish powder (FeSO4).
Pyrite can convert to marcasite naturally, and vice versa. Pyrite concretions may have preserved needle-shaped crystals of marcasite, but the marcasite is gone. X-ray analysis may be needed to determine which polymorph is present.
Locality: Vulcan Materials quarry, Racine, far-southeastern Wisconsin, USA
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Photo gallery of marcasite:
Dans le cadre de son exposition « Prototypes du Grand Napotakeu (2) » présentée au Cube jusqu’au 22 juillet, Jérôme Lefdup propose une sélection de ses vidéos réalisées au cours des trente dernières années. Ces vidéos sont autant des témoignages des phénomènes étranges observables dans Le Grand Napotakeu, mais aussi une ode à une de ses créatures les plus représentatives et déjà présente dans certaines pièces de son exposition au Cube : la Glute (et ses cousines Polyglutes, Multiglutes, Métaglutes, etc.).
La projection est suivie par la présentation et la mise en vente du tirage de tête (10 exemplaires) du livre en 5 volumes « Le Grand Napotakeu ». Les visiteurs munis de lecteur de QR-Codes pourront commander sur place les volumes de leur choix.
Une collation amicale après la projection vous convaincra que « les Glutes, c’est super ».
A couple of weeks ago Museums and Public relations department had an away day at the Institute of Making.
Design Challenge, The house of the future. Each team was asked to design and imagine an object/thing from a room in the house of the future.
Cheira-me que este coleóptero pertence à espécie Mylabris quadripunctata mas não tenho a certeza. Em Gilmonde apareceram às dezenas. Ontem vi um a escavar uma toca mas não percebi qual o motivo e na net não fala nada sobre a biologia desta espécie. No meu guia-de-campo fala da espécie Mylabris polymorpha como sendo parasita de ovos de gafanhotos.
PS: está confirmado que é M. quadripunctata.
Camponotus lateralis
Cette espèce se rencontre autour du bassin méditerranéen.
Camponotus lateralis est une fourmi de petite taille (3 à 7 mm pour les ouvrières ; 10 mm pour la reine). Elle présente un développement lent qui est de 3 mois du stade d'œuf au stade d'ouvrière. C'est une espèce dite polymorphe et monogyne. La parade nuptiale s'étend de début avril à fin mai, les reines peuvent s'accoupler avec une dizaine de mâles. La plupart d'entre elles ne survivent pas (gobées par des oiseaux...). Les survivantes (environ deux pour mille) se débarrassent de leurs ailes en les arrachant, puis pondent leurs premiers œufs qui ne serviront qu'à des fins nutritives. Les premiers " vrais " œufs sont blancs nacrés et sont peu nourris. Les reines se retrouvent sous des branches ou des pierres après leur essaimage.
Camponotus lateralis a le thorax et la tête rouge légèrement transparents. Bien nourrie, son abdomen est gonflé et présente quelques rayures (surtout avec le lait). Elle porte 11 segments au bout de ses antennes. La reine possède un abdomen bien ovale et bombé quand elle est prête à pondre.
Il n'existe pas de castes chez Camponotus lateralis mais leur polymorphisme permet de distinguer :
les ouvrières qui travaillent à la survie de la colonie en servant de nourrices, de chasseuses, de ramasseuses... ;
les médias qui sont de "super" ouvrières, plus grandes, et parfois amenées à faire la guerre ;
les majors qui sont nés pour faire la guerre mais qui peuvent également chasser ou ramasser de la nourriture ;
les mâles qui ne vivent que pour s'accoupler. Ils ont des yeux spécialement adaptés pour repérer les reines. Ils meurent après l'accouplement ;
les reines qui pourront donner naissance à une nouvelle colonie. Comme les mâles, elles sont ailées avant l'accouplement mais s'en distinguent par leur taille plus grosse.
Camponotus lateralis n'est pas dangereuse autant par ses armes spéciales que par son nombre. Elle ne possède pas de dare au bout de son abdomen et ses mandibules ne sont pas très puissantes. De plus, ce n'est pas une espèce de grande taille.
Camponotus lateralis est dite à fondation indépendante, ce qui signifie que la reine fonde elle-même sa propre colonie. La reine n'est donc plus alimentée pendant plusieurs mois mais elle fait des ouvrières avant l'hivernage. Les fourmilières de camponotus lateralis détenues en captivité avoisinent les 600 ouvrières.
Camponotus lateralis hiverne (hiberne) pendant à peu près 5 mois de début novembre à fin mars lorsque la température descend sous les 10 à 15 °C. Hiverner lui est impératif pour reprendre des forces.
Camponotus lateralis essaime d'avril à août. Généralement, les individus sexués sortent toutes et tous ensemble du nid pour aller se reproduire ce qui évite trop de pertes. Malheureusement, les princesses et les mâles sont incapables de se défendre contre les insectes hostiles et les oiseaux et la plupart meurent. Quand elle atterrit, la princesse devenue reine se cache rapidement pendant toute une année, et pendant cette année, elle ne mange que ses ailes désormais inutiles jusqu'à la première ouvrière. Habituellement, les premières soldates naissent après la naissance d'une cinquantaine d'ouvrières.
Source Wikipedia
Orange-flowered ‘ōhi‘a lehua. Endemic to the Hawaiian Islands, cultivated. Waimea Nature Park, Waimea, Hawaii Island, Hawaii.
Espécie arbórea
Nome vulgar: Cambará
Nome científico: Gochnatia polymorpha
Localização: Bosque Engenharia Florestal - UFPR