Morphological variations in Cycloclypeus carpenteri

Autor(en)
Antonino Briguglio, Shunichi Kinoshita, Erik Wolfgring, Johann Hohenegger
Abstrakt

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.

Organisation(en)
Institut für Paläontologie, Institut für Geologie
Externe Organisation(en)
Universiti Brunei Darussalam (UBD)
Journal
Palaeontologia Electronica
Band
19
DOI
https://doi.org/10.26879/595
Publikationsdatum
01-2016
Peer-reviewed
Ja
ÖFOS 2012
105118 Paläontologie
Schlagwörter
ASJC Scopus Sachgebiete
Oceanography
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/a9f06e56-eb4b-4292-8b68-64444e317233