radiolaria - rads_cat - Stichocorys johnsoni radiolaria - rads_cat - Stichocorys johnsoni

CATALOG OF ORIGINAL DESCRIPTIONS: Stichocorys johnsoni Caulet 1986

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 -> Stichocorys -> Stichocorys johnsoni
Other pages this level: S. aemiliana, S. baerii, S. bonarellii, S. huschkei, S. johnsoni, S. latus, S. martellii, S. muelleri, S. multipora, S. negripontensis, S. neodelmontensis, S. okenii, S. panderi, S. rathkei, S. saccoi, S. seriata, S. wolffii

Stichocorys johnsoni

Citation: Stichocorys johnsoni Caulet 1986
taxonomic rank: species
Described on page(s) : p.851
Type specimens: pl.6, figs.5-6
Family (traditional): Theoperidae
Family (modern): Eucyrtidiidae

Current identification/main database link: Stichocorys johnsoni Caulet 1986


Original Description

Shell with four (or more?) segments, distinctly separated by constrictions, the first three segments together forming a conical section. Cephalis subspherical, rough, poreless, and bearing a slightly curved apical horn generally longer than the first segment. Thorax subspherical, well developed, having 20-30 irregularly arranged subcircular pores. Third segment conical, longer and broader than any other, bearing two kinds of pores: ordinary small pores on the whole surface and a single row of pores twice as large as the others just below the lumbar stricture. Fourth segment generally ragged with smaller pores irregularly arranged. Entire apertural margin never observed.

Size:
Length of first, second and third segments 120-130 µ. Thoracic length 40 µ. Abdominal length 50-60 µ.

Etymology:
After D. A. Johnson

Extra details from original publication
Distinguishing characters: Eucyrtidium diaphanes (Sanfilippo et al., 1973, p.221, pl.5, figs.12-14) also has a single row of large pores just below the lumbar stricture and is thus similar to this form, but its shell has a different shape and the stratigraphic range is quite different.

Editors' Notes
This species was first described from Indian Ocean material. Pacific Ocean forms of this species generally lack an indentation on the third segment.

References:

Caulet, J. (1986a). A refined radiolarian biostratigraphy for the Pleistocene of the temperate Indian Ocean. Marine Micropaleontology. 11(1-3): 217-229. gs


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Stichocorys johnsoni compiled by the radiolaria@mikrotax project team viewed: 7-12-2024

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