- Type images:
type material: C. thermophila
Catalog entries: Centrobotrys thermophila
type material: C. thermophilaOriginal description: The cephalic chamber of this species is well-developed. Its upper part presents a coarse "sculpture" while the lower part is built on very strong parts of the internal skeleton such as A, MB, Lr and LL. The A, D, Lr and Ll spines protrude outside of the shell through rather large special pores, as thread-like appendages, often broken.
The external shell is cap-shaped with flat sides. Its upper part is almost closed but its lower basis is widely open (at least in all observed specimens). The shell wall is rather thick at the level of the cephalic chamber but is thinning above an below. Pores small, numerous on the upper and lower parts of the shell, but larger and more sparsely distributed on the median area. Cross-section of the shell oval. [In Russian. Translation by J.P.C.]
Dimensions: Shell length: 120µm and more. Dimension along the sagittal axis at the level of the cephalic chamber: 75-80µm. Length of cephalic chamber: 33-35µm, along the sagittal axis: 52-28µm. Distinguishing characters (rw): This species was observed by Popofsky; but its determination was wrong. This species cannot be related to the genus Androspyris and has nothing in common with the form described as A. aptenodytes by Haeckel. Unfortunately Haeckel did not give any illustration of this last form, but Centrobotrys thermopila differs by its dimensions, its structure, and mostly by its geographic distribution. Haeckel had described these forms from the sediments of the “Challenger” station 157 in the Atlantic. A detailed study of the radiolarians from this area indicates that Centrobotrys thermopila cannot be found. It is, in the contrary, mostly found in tropical areas.
Remarks on original description: Popofsky has observed this species in the SW Indian Ocean in the plankton collected between 400m and the surface. We found it in 49 surface plankton tows from the Indian Ocean during the 2d Cruise of the "Ob" oceanographic vessel. In "Vitiaz" stations 5117 and 5124 from the Pacific Ocean it occurs in plankton tows from 25 to 50m deep. It was observed more rarely in the sediments from the tropical areas, but never in Antarctic.
Geological Range:
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:
Petrushevskaya, M. G. (1965). Osobennosti Konstruksiy skeleta Radiolyariy Botryoidae (Otr. Nassellaria). Trudyi Zoologicheskogo Instituta, Akademiya Nauk, SSSR. 79-118. gsReferences:
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Centrobotrys thermophila compiled by the radiolaria@mikrotax project team viewed: 6-3-2021
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