Download e-book for iPad: Evolutionary Biology and Ecology of Ostracoda: Theme 3 of by Roger K. Butlin, Paolo Menozzi (auth.), David J. Horne, Koen
By Roger K. Butlin, Paolo Menozzi (auth.), David J. Horne, Koen Martens (eds.)
Ostracoda (Crustacea) are very likely very good version organisms for evolutionary reviews, simply because they mix an intensive fossil list with a large fresh distribution and hence permit stories on either styles and methods resulting in extant range. the most clinical domain names contributing theories, innovations, and information to evolutionary biology are morphology (including ontogeny), palaeontology, genetics, and ecology, and to all of those points ostracods can give a contribution. this is often basically illustrated by means of the fifteen papers awarded less than topic three of the thirteenth overseas Symposium on Ostracoda (Chatham, united kingdom) in 1997 that are grouped within the current complaints, certainly one of 3 volumes because of this assembly. The contributions take care of the evolution of either extant and fossil varieties (including many of the Phanaerozoic), ecology of either marine and freshwater taxa, and (developmental) morphology of either tender elements and valves. even if the canvas is large, every one paper truly indicates how experiences on Ostracoda might be proper to common concept on evolutionary biology and ecology.
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Additional info for Evolutionary Biology and Ecology of Ostracoda: Theme 3 of the 13th International Symposium on Ostracoda (ISO97)
Seg- 22 udinally and extend to both lateral sides of the trunk. Segments T8 and T9 are extremely compressed. Cephalosome 1st 2nd TS fu fu Figure 6. Diagrammatic trunk body plan of Crustacea, dorsal view (modified after Schram, 1986). The terminal segment is denoted as T l and the next anterior segment as T2 and so forth. an -anus; crcaudal ramus; fu - furca; te - telson; up- uropod. ments T7, Tl 0 and Tll extend to both lateral sides of the trunk. Segments T 10 and Tll are extremely longitudinally compressed.
For example, the male copulatory organ is near the fifth (T7) or the sixth (T6) trunk segment in Platycopida (Schultz, 1976), and between the fifth (T7) and seventh (T5) segments in Kirkbyocopina (Swanson, 1989). It is, therefore, probable that the pair of female copulatory organs in Podocopida is homologous to the copulatory organs of both sexes of Platycopina and Kirkbyocopina. Since in both primitive taxa the fifth (T7) segment is suspected to derive male and female copulatory organs, segment T7 seems to be the most probable one from which the female copulatory organs originate.
Branchial plates broader and more elongate than in ins tar A-5 and fringed on the posterior edge by nine hirsute (covered with setules) setae. 53 L5s developed into walking legs, cons1stmg of four podomeres. First podomere rounded and with a small projecting base (endite), bearing one long and one short setae. Second podomere subquadrate. Third podomere rectangular. Final podomere trapeziumshaped and bearing a long serrated claw and two short setae. Anlagen of L6 appearing in this instar, morphologically very similar to Anlagen of L5 in instar A5, consisting of a basal podomere with a terminal, triangular-shaped cap and protruding from just behind the base of the L5.
Evolutionary Biology and Ecology of Ostracoda: Theme 3 of the 13th International Symposium on Ostracoda (ISO97) by Roger K. Butlin, Paolo Menozzi (auth.), David J. Horne, Koen Martens (eds.)