Morphological variations in Cycloclypeus carpenteri: Multiple embryos and multiple equatorial layers
Morphological variations in Cycloclypeus carpenteri: Multiple embryos and multiple equatorial layers
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Cycloclypeus carpenteri 的形态变异：多个胚胎和多个赤道层
DOI：
10.26879/595
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发表时间：
2016
影响因子：
2
通讯作者：
E. Wolfgring
中科院分区：
文献类型：
--
作者：
A. Briguglio;S. Kinoshita;J. Hohenegger;E. Wolfgring
本文对17个青蟹标本进行了显微CT扫描分析。据观察，许多标本具有多个胚胎，多个nepions和一些测试显示一个以上的赤道层。每个前房的直径都被测量过，即使在同一个标本中，它们似乎也是非常可变的，因此质疑了长期以来已知的理论，即配子体的前房比配子体小，也质疑了同一物种的前房应该都有可比的大小。每当海王星位于不同的平面上，从而在它们之间产生一个角度时，这个角度与连接不同赤道层的角度有很大的相关性。T形连接位于两个赤道层之间的连接处;这些连接是由一个小腔组成的，它拥有异常多的孔，类似于螺属的小腔结构。安东尼奥·布里古里奥文莱达鲁萨兰国大学理学院，Jalan Tungku Link，Gadong BE 1410，文莱达鲁萨兰国，antonino. ubd.edu.bn; Shunichi Kinoshita。维也纳大学古生物系，地理中心，Althanstrasse 14，A1090维也纳，奥地利。Shunichi. univie.ac.at Johann Hohenegger.维也纳大学古生物系，地理中心，Althanstrasse 14，A1090维也纳，奥地利。johann. univie.ac.at Erik Wolfgring.维也纳大学地球动力学和沉积学系，Geocenter，Althanstrasse 14，A-1090维也纳。Erik. univie.ac.at
In this work, 17 specimens of Cycloclypeus carpenteri have been analysed by means of microCT scanning. It has been observed that many specimens possess multiple embryos, multiple nepionts and some tests show more than one equatorial layer. The diameter of each proloculus has been measured, and it seems that they are very variable even within the same specimen, therefore questioning the long known theory that schizonts have smaller proloculi than gamonts and also questioning the fact that proloculi in the same species should all have comparable size. Whenever the nepionts are positioned on different planes, thus creating an angle between them, this angle has a significant correlation to the angle connecting different equatorial layers. T-shaped connections are located at the junction between two equatorial layers; these junctions are made by a chamberlet, which possesses an unusually higher number of apertures, resembling the chamberlet structure of the genus Spiroclypeus. Antonino Briguglio. Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong BE1410, Brunei Darussalam, antonino.briguglio@ubd.edu.bn; Shunichi Kinoshita. Department of Palaeontology, University of Vienna, Geocenter, Althanstrasse 14, A1090 Vienna, Austria. shunichi.kinoshita@univie.ac.at Johann Hohenegger. Department of Palaeontology, University of Vienna, Geocenter, Althanstrasse 14, A1090 Vienna, Austria. johann.hohenegger@univie.ac.at Erik Wolfgring. Department of Geodynamics and Sedimentology, University of Vienna, Geocenter, Althanstrasse 14, A-1090 Vienna, Austria. erik.wolfgring@univie.ac.at