CATALOG OF ORIGINAL DESCRIPTIONS: Orbula comitata Foreman 1973

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 -> O -> Orbula -> Orbula comitata
Other pages this level: O. comitata, O. discipulus, O. ducalis,

Orbula comitata

Citation: Orbula comitata Foreman 1973
Rank: species
Holotype Repository: Holotype n°USNM 178753, DSDP 10-86-8-3(46-48), E42/0 and paratype n°USNM 178754, DSDP 10-86-8(CC), F47/0 U.S. National Museum, Washington, D.C.
Type & figured specimens: pl.3, fig.11, pl.10, figs.7,8
Description on pages: p.437
Family (traditional): Theoperidae
Family (modern): Bekomidae

Current identification/main database link: Orbula comitata Foreman 1973


Original Description
Cephalis subspherical, circular to subtriangular in transverse section, with thick wall, bearing a conical or rodlike apical horn and frequently tiny vertical and secondary lateral spines. Cephalis and proximal thorax poreless, surface minutely papillate, often with circular pore-shaped depressions. Collar stricture internally with six collar pores, the collar structures very weak, and rarely preserved whole (Figure 5). Externally contour of cephalis merges with thorax. Thorax with circular to subcircular pores very variable in size, quincuncially arranged in approximate longitudinal rows; surface tuberculate. Thorax subspherical when viewed laterally, circular to subtriangular in transverse Section. Three short, basally ridged feet extend from the thorax at the point where it begins to constrict. Aperture circular to subtriangular, surrounded by a rounded rim with surface ridged or minutely papillate.

(Based on fifteen specimens). Length of cephalis and thorax 160-185µm; greatest width of thorax 150-200µm. Distinguishing characters (rw): This species differs from O. ducalis in its smaller size and the shape of the cephalis and thorax, and from O. discipulus as described under that species.

References:

Foreman, H. P. (1973a). Radiolaria of Leg 10 with systematics and ranges for the families Amphipyndacidae, Artostrobiidae, and Theoperidae. Initial Reports of the Deep Sea Drilling Project. 10: 407-474. gs :: ::


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Orbula comitata compiled by the radiolaria@mikrotax project team viewed: 11-8-2020

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