radiolaria - rads_cat - Stylosphaera coronata macrosphaera radiolaria - rads_cat - Stylosphaera coronata macrosphaera

CATALOG OF ORIGINAL DESCRIPTIONS: Stylosphaera coronata macrosphaera Nishimura 1992

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: rads_cat -> S -> Stylosphaera -> Stylosphaera coronata macrosphaera
Other pages this level: S. angelina, S. calliope, S. carduus, S. clio, S. coronata, S. coronata macrosphaera, S. coronata sabaca, S. datura, S. eocenica, S. erato, S. euterpe, S. fairchildi, S. flexuosa, S. fornasinii, S. gonioxyphos, S. goruna, S. haeckeliana, S. hexaxyphophora, S. hexaxyphophora hexaxyphophora, S. hexaxyphophora octaxyphophora, S. hexaxyphophora pentaxyphophora> >>

Stylosphaera coronata macrosphaera

Citation: Stylosphaera coronata macrosphaera Nishimura 1992
Taxonomic rank: sub-species
Described on page(s) : p.325
Type specimens: pl.1, figs.3,4; pl.11, fig.1
Type repository: Holotype no n°, and paratypes n° LMMN AN0024-7, and LMMN AN0037-2. Laboratory of the Microfossil's study of Matsumoto, Nagano, Japan
Family (traditional): Actinommidae
Family (modern): Amphisphaeridae

Current identification/main database link: Stylosphaera coronata macrosphaera Nishimura 1992


Original Description

Shell consists of two shells; one outer and one inner shell. Outer shell globular, quite large, thick-walled, smooth-surfaced with rosette-shaped pores regular in size and form. Inner shell bit pear-shaped, delicate. Polar spines three-bladed in cross-section, dissimilar in size; one very short, the other longer, slightly curved. Some specimens often have short spines in the equatorial plane.

Size:
(Based on 15 specimens) Diameter lengthwise 112-140 µ, at equator 110-135 µ, of inner shell 38-50 µ.

Etymology:
macrosphaerais derived from the Latin meaning large sphere.

Extra details from original publication
Distinguishing characters: This form is distinguished from Stylosphaera coronata sabaca Sanfilippo and Riedel (1973, p.521, pl. 1, figs. 20-22; pl. 25, figs. 9, 10) by having a single outer shell and short polar spines. This subspecies occurs commonly in the lower part of the examined section, and decreases in the upper part of the section.

References:

Nishimura, A. (1992). Paleocene radiolarian biostratigraphy in the northeast Atlantic at Site 384, Leg 43, of the Deep Sea Drilling Project. Micropaleontology. 38(4): 317-362. gs


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Stylosphaera coronata macrosphaera compiled by the radiolaria@mikrotax project team viewed: 24-6-2025

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