首页> 外文期刊>Bulletin of the British Arachnological Society >Disturbances in the structure of the prosoma in Tegenaria atrica induced by alternating temperatures (Araneae: Agelenidae)
【24h】

Disturbances in the structure of the prosoma in Tegenaria atrica induced by alternating temperatures (Araneae: Agelenidae)

机译:交替温度引起的Tegenaria atrica原生质体结构紊乱(Araneae:Agelenidae)

获取原文
获取原文并翻译 | 示例
       

摘要

Some unique cases of bicephality in Tegenaria atrica C. L. Koch are described. This phenomenon is known to be the result of broadening and then sagittal bifurcation of the anterior germ band. In consequence there develop two head tagmae, equivalent ifthe germ band divides symmetrically or non-equivalent if the division is asymmetrical. The bifurcation of the germ band can be shallow, which produces two heads, or deep, which may lead to the development of so-called "Siamese twins". A less frequent cause of bicephality is bifurcation across the anterior end of the germ band in the horizontal plane. Then two head somites develop, the main head, usually with a normal structure, and a so-called accessory head, usually incomplete, situated one above theother. In the authors' opinion the study of the morphology of the anterior body in bicephalous individuals provides exceptional opportunities for studying the interrelations between the functioning of the particular parts of the brain and widely understood behaviour of spiders.
机译:描述了在Tegenaria atrica C. L. Koch中双脑性的一些独特病例。已知该现象是前胚带先扩宽然后矢状分叉的结果。结果,形成了两个头标,如果种带对称地分开,则相等,如果不对称地分开,则不相等。胚带的分叉可以很浅,会产生两个头,也可以很深,可能导致所谓的“连体双胞胎”的发展。引起双头畸形的频率较低的原因是在水平面中细菌带前端的分叉。然后,形成两个头节,一个通常具有正常结构的主头,另一个位于另一个之上的所谓的辅助头,通常不完整。在作者看来,对双头畸形个体前体形态的研究为研究大脑特定部位的功能与广泛了解的蜘蛛行为之间的相互关系提供了特殊的机会。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号