...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Munis Entomology Zoology >Embryonic development in Muga Silkworm, Antheraea assamensis Helfer (Lepidoptera: Saturniidae)
【24h】

Embryonic development in Muga Silkworm, Antheraea assamensis Helfer (Lepidoptera: Saturniidae)

机译：M蚕（Atheraea assamensis Helfer，鳞翅目：:科）的胚胎发育

获取原文
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

 Chronological variations during embryonic development of normal eggs of Antheraea assamensis Helfer were recorded from 24 h to till hatching. During 10-16 h of the embryonic development, the ventral plate is formed and by 24 h trough shaped embryonic premodium floats in yolk and the protocephalon and protocorn are separated by transverse furrows. After 96 h the embryo became C-shaped. Although, mouth parts are yet not developed completely but they were at the advance stage of development. The thoracic region is clearly divisible into three thoracic segments. After 120 h, organogenesis in embryo takes place. The antennae bear segments and head region was detachable into three segments. The head capsule formation completed in after 144 h and mouth parts got matured. Three segmented antennae with antennal setae, the mandibles and labrum are well developed. After 168 h old, mandible become selerotised and pigmented at distal ends. Larval eyes appear as six brown spot on either side of head. The spiracles are clearly visible on the sides of the body. Fully developed muga silkworm larva comes out from the egg cell after 8th day of oviposition rupturing the anterior part of egg shell by the mandibles.
机译：从24 h到孵化为止，记录as蚕正常卵在胚胎发育过程中的时间变化。在胚胎发育的10-16小时内，腹板形成，卵形卵形的24 h槽形胚胎初生浮游物通过横沟将原头和原玉米分开。 96小时后，胚胎变成C形。尽管口部尚未完全发育，但它们仍处于发展的晚期。胸腔区域明显可分为三个胸段。 120小时后，胚胎发生器官发生。触角熊段和头部区域可分为三段。头囊形成在144小时后完成，口部成熟。带有触角刚毛，下颌骨和唇的三段式触角非常发达。 168小时后，下颌骨在远端被硬骨化和着色。幼虫的眼睛在头部的两侧出现六个棕色斑点。气孔在身体的侧面清晰可见。产卵第8天后，下颌骨破坏了卵壳的前部，从卵细胞中取出了成熟的大蚕幼虫。

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