Egg structure and outline of embryonic development of the basal mantodean, Metallyticus splendidus Westwood, 1835 (Insecta, Mantodea, Metallyticidae)
Egg structure and outline of embryonic development of the basal mantodean, Metallyticus splendidus Westwood, 1835 (Insecta, Mantodea, Metallyticidae)
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DOI：
10.1016/j.asd.2017.11.001
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发表时间：
2018-01-01
影响因子：
2
通讯作者：
Machida, Ryuichiro
中科院分区：
文献类型：
--
作者：
Fukui, Makiko;Fujita, Mari;Machida, Ryuichiro
鸡蛋的结构和胚胎发育的轮廓Metallyticus、基底螳螂目代表之一,Metallyticidae本研究中描述。并将所得结果与前人的研究结果进行比较，以重建和探讨螳螂亚目和翼翅目的地平面。在M. splendidus中，卵是球形的，在中央有凸的腹侧，其中有许多微孔，在其前半部分有明显的孵化线。这些是螳螂卵的地面特征，而“卵腹侧成组的微孔珠”被认为是双翅目昆虫的一种非胚性地面特征。一个小的圆形胚胎是由囊胚细胞的简单集中形成的，然后经历典型的短胚带类型的胚胎发生。胚分裂属于“不可逆型”，胚胎在整个胚胎发育过程中保持其原有的表面位置和原有的方向。在发育的中期，胚胎围绕卵的前后轴旋转。这些特征是曼托亚的地面规划的一部分。Mantodea和blaberoidean bltodea共享的“非逆转型”胚细胞分裂是否可以视为同源性或同源性尚不确定。(C) 2017 Elsevier Ltd.版权所有。
The egg structure and outline of the embryonic development of Metallyticus splendidus of one of the basal Mantodea representatives, Metallyticidae, were described in the present study. The results obtained were compared with those from the previous studies, to reconstruct and discuss the groundplan of Mantodea and Dictyoptera. In M. splendidus, the egg is spheroidal, it has a convex ventral side at the center in which numerous micropyles are grouped, and it possesses a conspicuous hatching line in its anterior half. These are the groundplan features of mantodean eggs and the "grouped micropyles in the ventral side of the egg" are regarded as an apomorphic groundplan feature of Dictyoptera. A small circular embryo is formed by a simple concentration of blastoderm cells, which then undergoes embryo genesis of the typical short germ band type. Blastokinesis is of the "non-reversion type" and the embryo keeps its original superficial position and original orientation throughout embryonic development. During the middle stages of development, the embryo undergoes rotation around the egg's anteroposterior axis. These features are a part of the groundplan of Mantodea. It is uncertain whether sharing of the "non-reversion type" of blastokinesis by Mantodea and blaberoidean Blattodea can be regarded as homology or homoplasy. (C) 2017 Elsevier Ltd. All rights reserved.