Entomology 3rd edition - C Gillott - Chapter 17 ppsx

... are i mportant h emo l ymp h const i tuents, espec i a ll y i n j uven il een d optery - g otes. Carbox y lic acids (citric, α -keto g lutaric, malic, fumaric, succinic, and oxaloacetic), which in the hemol y mph ... ant if reezes. 5 2 6 CHAPTER 17 v a cuoles and g ranules that contain carboh y drate material. The cells, which occasionall y are pha g oc y tic, are considered b y some...

Ngày tải lên: 06/07/2014, 21:21

... aquatic. Occasionally, species form large aggregations on the surfac e o f snow, though the significance of this is not clear. Most Collembola cannot tolerate d esiccation, and those that colonize ... intrinsic gut cellulase. Only rarely are they predaceous. Thoug h af ew f f s pecies are occasionally of economic importance because of the damage they cause to p lants, overall Collembola ma y b...

Ngày tải lên: 06/07/2014, 21:21

... to three such structures occur. The spermatheca and the duct with which i t j o i ns t h e b ursa are li ne d w i t h cut i c l e. T h e cut i c l e over l a y s a one-ce ll -t hi c kl a y er ... a dj acent to w hi c h are many mitochondria, features characteristic of cells involved in ion exchange (compar e the structure of Malpighian tubule and rectal epithelial cells, Chapter 18,...

Ngày tải lên: 06/07/2014, 21:21

... 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 ....

Ngày tải lên: 06/07/2014, 21:21

... 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...

Ngày tải lên: 06/07/2014, 21:21

... 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...

Ngày tải lên: 06/07/2014, 21:21

... most s p ecies are described on the basis of their structure, es p e- ciall y external characters. However, on occasion such “morphospecies” are not equiva- l ent to bi o l og i ca l spec i es (repro d uct i ve l y i so l ate d popu l at i ons); ... ke y . Pictorial ke y s, which can be valuable to both specialists an d n on-specialists, include not only printed material but also user-friendl...

Ngày tải lên: 06/07/2014, 21:21

... a ll ow i n g ot h er c onspeci c males to occup y the space. Should a receptive female conspeci c enter the territor y and be reco g nized b y the male (probabl y usin g visual cues), he will attempt ... t h e j uven il eort h ea d u l t f orm . T he scheme used here is based on McCaffert y (1991), Wan g and McCaffert y (1995), Bae and McCaffert y (1995), and McCaffert y (personal commun...

Ngày tải lên: 06/07/2014, 21:21

... spec i es may occas i ona ll y b ecome assoc i ate d w i t hh umans, f or examp l e , Py cnosce l is surinamensis ( t h e Sur i nam coc k - roach ), Leuco p haea madera e ( the Madeira cockroach ) ,an d N au p hoeta ... di ff erentialis; ( B ) th e Caro li na g rass h opper , Dissosteira caro l ina ; and ( C ) the South American locust, S chisto - ce r ca a m e r ica n a . [A, B, fr...

Ngày tải lên: 06/07/2014, 21:21

... per i o di cc i ca d a . M agi- cica d a septen d ecim ( C i ca did ae ) . [From C. L. Mar l att, 1907, The periodical cicada , Bull. U.S. Dept A g r. Bur. Ent. (N. S. ) 71 :181 pp.] 222 CHAPTER 8 F IGURE ... lac insect, p roduces a secre- tion from which shellac is p re p ared. The PSEUDOCOCCIDAE (2000 s p ecies worldwide) are t h e common mea l y b ugs, so-ca ll e db ecause f ema l es...

Ngày tải lên: 06/07/2014, 21:21