Catalog entries: Phormospyris tricostata
Original description: Cephalis nut-shaped, thorny, with deep sagittal and collar strictures, half as large as the pyramidal thorax. Mouth of the latter dilated and ciliated, twice as broad as the cephalis. Pores irregular, polygonal, with thin bars. Three cylindrical, straight, divergent ribs descend in the wall of the thorax, and are prolonged over the mouth into three short conical teeth.
Last occurrence (top): Extant Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"
Plot of occurrence data:
Phormospyris tricostata compiled by the radiolaria@mikrotax project team viewed: 26-11-2020
Short stable page link: http://mikrotax.org/radiolaria/index.php?id=205011 Go to Archive.is to create a permanent copy of this page - citation notes