Entomology 3rd edition - C Gillott - Chapter 18 ppt

... factor(s) involved nor the site of action is k nown. Changes in the rate of uric acid production, for example, occur at speci c stages in an insect’s life and these can be correlated with fluctuations ... spec i es d r i n k excess i ve l yan d p roduce hyperosmotic urine by secreting ions across the rectal wall; in contrast, brackish - w ater insects osmoconform by increasing the concent...

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... t h e b as i so f X-ray stu di es o f pyr i t i ze d tr il o bi te spec i mens, w hi c h s h ow that trilobites possess a combination of chelicerate and crustacean characteristics, Cisne ( 1974) concluded ... mo d ern p h y l ogenet i c i sts cannot accept t h e Ate l ocerata (see Sect i on 3.3.1) an d t h eUn i ram i a (se e Sections 3.2.2 and 3.3) as monoph y letic taxa . C rustacea ....

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... sta g e i nw hi c h t h e insect can pass throu g h adverse climatic conditions, especiall y freezin g temperatures. 4. The Success of Insect s The de g ree of success achieved b y a g roup of or g anisms can be measured ... As success measured as the number of different species is a direct result of evolution, the environmental chan g es that must be considere d are the long-term climatic...

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... gland cells again exhibit cyclical activity associated with new cuticle production, an d i t has been p ro p osed that the y secrete the cement la y er of e p icuticle. T h e cut i c l e, w hi c hi sma i n ly ... e pi cut i c l ean db uc ki n g o f cut i cu li nenve l o p e. (F) Be gi nn i n g o fp rocut i c l e secret i on. (G) Cut i c l e i mme di ate ly after ecdysis. (H) Cuticle...

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... 4 3 9 M U S CLE S AND LO C OMOTIO N t o the cuticulin envelope of the epicuticle to which they are attached by a special cement. As the cuticulin la y er is the first one formed durin gp roduction of ... muscle contractio n a pp lies. Thou g h insect muscles are alwa y s cross-striated, there is considerable variation i n th e i r structure, bi oc h em i str y ,an d neura l contro l , i n ac...

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... o f car b on di ox id e i n water, com- prises three phases (Fi g ure 1 5 .6): constricted- or closed-spiracle phase, flutterin g -spiracl e p hase, and o p en-s p iracle p hase. In the constricted-s p iracle p hase ... compr i se cut i cu l ar components, ep id erm i s, and basal lamina (Fi g ure 1 5 .2). Ad j acent to the spiracle, the tracheal cuticle includes, the c uticulin envelope, ep...

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... Deve l opmenta l Systems: Insects ,V ol. I (S. J. VV Counce and C. H. Waddin g ton, eds.). B y permission of Academic Press Ltd., and the author.] extra-embryonic ectoderm from which the extra-embryonic membranes ... base to which other pro g enitor muscle cells (m y oblasts) become attached. As each muscle develops, it g rows t owar d as p ec ifi ce pid erma li nsert i on s i te (C h a p te...

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... permission of Agricultural Sciences Publications, Universit y of Ca lif orn i a; an d P. DeBac h , D. Rosen, an d C. E. Kennet, 1971, B i o l o gi ca l contro l o f cocc id s by i ntro d uce d n atural ... Biochemical interaction between p lants and insects , Recent Ad v . P h y tochem . 1 0 :425 pp . 6 9 7 THE BI O TI C ENVIRONMEN T accumulated b y cucumber beetles. In Lepidoptera the che...

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... Research Council of Canada and the author. B, from R. E. Snod g rass, P rinciples o f I nsect Morpholo gy. Copyright 1935 by McGraw-Hill, Inc. Used with permission of McGraw-Hill Book Company. ] ( see ... (B) cross - section of the proboscis. [From R. E. Snodgrass, P rinciples o f Insect Morphology . Copyright 1935 by McGraw-Hill, I nc. Use d w i t h perm i ss i on o f McGraw-H ill Boo k...

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... spec i es i nt h e genu s Calotermes. A s noted above, most s p ecies are described on the basis of their structure, es p e- ciall y external characters. However, on occasion such “morphospecies” ... Entomo l. 45 :1–54. Comstoc k, J. H. , 1 918 , Th e Wings of Insect s , Comstoc k, New Yor k. Crampton, G. C. , 1915, The thoracic sclerites and the systematic position o f Grylloblatta campode...

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