助手标题
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
共[2]页 共[27]条 当前为第1条到20条
 

相关语句
pygidium
type and arrangement of chaetae, modified fifth setiger, caruncle, branchiae, pygidium) when examined with SEM.
      
triestinus the upper lip is hypertrophied and strongly protruding) and the pygidium (in P.
      
Müller consists only of the differentiation of the pygidium.
      
However, an histological study of these regenerates shows a beginning of mesodermal segmentation and parapodial differentiation in the area between the regenerated pygidium and the stump.
      
A simple model is proposed, allowing for these results, which states that the larval body of a polychaete consists of two regions with completely different positional values (episphere - prostomium; hyposphere - pygidium).
      
The rate of segment formation is high when there is a wide gap in positional values between pygidium and adjoining budding zone and the posteriormost segment.
      
During caudal regeneration, first of all a new pygidium with an adjacent proliferation zone is formed and the original positional value of the posteriormost part of the body is reestablished.
      
A neural network appears around the pygidium, and this is followed by growth of the body at the posterior end.
      
The main features of the new polychaete are: length up to 650μm; body divided into a prostomium (without any appendages), 7 segments and pygidium; segments 3 to 6 carry simple parapods as well as setae and aciculae.
      
To compare the sex pheromone contents of atrial glands, pygidium, rectum, and colon, we recorded the EAG responses of male antennae to these extracts.
      
For both species, the glandular structures responsible for pheromonal production are located on the female pygidium.
      
Abdomen without modified setae; sternite 5 emarginate to about one third its length; pygidium 1.2 times as long as wide.
      
Doublure of fairly even width, becoming narrower towards lateral margins, narrowing rather abruptly at anterolateral corners of pygidium.
      
Fine details are not well preserved, including the division between the thorax and the very small pygidium.
      
Here we accept this view and define the pygidium as the set of conjoined segments posterior to the last trunk articulation.
      
Most individuals are represented by a cephalon or cranidium with an articulated thorax; a minority of specimens also include an associated pygidium.
      
More significantly, bostoviensis also exhibits a relatively underived pygidium, with a triangular pygidial outline with an acutely angled tip.
      
Other differences are the more exsagittal lateral margins of the cranidium and length/width ratios of the crandium and pygidium.
      
Pygidium possesses short axis and pleural spines spaced asymmetrically from one another showing slightly wider distance between the innermost pair.
      
Pygidium without notch in posterior dorsal or ventral margin of basal segment.
      
 

首页上一页12下一页尾页 

 
CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社