radiolaria - rads_cat - Buryella tetradica

CATALOG OF ORIGINAL DESCRIPTIONS: Buryella tetradica 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 -> B -> Buryella -> Buryella tetradica
Other pages this level: B. alifera, B. clinata, B. dumitricai, B. foremanae, B. hannae, B. helenae, B. kaikoura, B. longa, B. pentadica, B. petrushevskayae, B. spina, B. tetradica, B. tridica

Buryella tetradica

Citation: Buryella tetradica Foreman 1973
Rank: species
Described on page(s) : p.433
Type specimens: pl.8, figs.4,5; pl.9 figs.13-14
Type repository: Holotype n° USNM 178746 (DSDP 10-96-3-5, 42-44 cm, G18/3). U. S. National Museum, Washington, D. C.
Family (traditional): Theoperidae
Family (modern): Artostrobiidae

Current identification/main database link: Buryella tetradica Foreman 1973


Original Description

Shell of four segments subovate, smooth, with none of the strictures expressed externally. Cephalis subspherical, with a few circular pores, bearing a short, sharp horn or thorn. Collar stricture with four collar pores internally, and vertical pore expressed as a short horizontally directed tube. Thorax conical, with circular pores arranged in approximately three vague transverse rows or more irregular. Third segment largest, inflated, with greatest dimension medianly or in the distal half. Uniform circular pores are arranged in longitudinal and four to five transverse rows. Area between the longitudinal rows raised. Last segment inverted truncate-conical, with a smooth thinner wall and two to seven transverse rows of circular to elliptical pores. Distal margin scalloped or even, without a differentiated rim.

(Based on 20 specimens) Length overall, exclusive of horn, 120-185µm, length of cephalis and thorax 35-45µm, of third segment 40-65µm, of last segment 70-95µm; greatest width 70-95µm. Distinguishing characters (rw): The thorax of B. tetradica is considered homologous with the two postcephalic segments of B. pentadica. This difference in the number of segments between the cephalis and the large inflated segment serves to distinguish these two closely related species (B. pentadica, ancestor and B. tetradica, descendant). Phylogeny (rw): The thorax of B. tetradica is considered homologous with the two postcephalic segments of B. pentadica. This difference in the number of segments between the cephalis and the large inflated segment serves to distinguish these two closely related species (B. pentadica, ancestor and B. tetradica, descendant).

No descendants of B. tetradica have been recognized. Initially Foreman thought that B. tetradica was the ancestor of B. clinata, but subsequent studies [847] led her to believe that the ancestor is Pterocodon (?) anteclinata.

Translation:

Size:

Etymology:
(B. pentadica, ancestor and B. tetradica, descendant). B. tetradica differs from its descendant B. clinata by having pores of the third segment in transverse and longitudinal rows.

Extra details from original publication

Editors' Notes
[Equivalent to Lithocampium sp. A, Riedel and Sanfilippo, 1971, pl.7, fig.12]

References:

Foreman, H. P. (1973b). 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 O

Riedel, W. R. & Sanfilippo, A. (1971). Cenozoic Radiolaria from the western tropical Pacific, Leg 7. Initial Reports of the Deep Sea Drilling Project. 7: 1529-1666. gs


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Buryella tetradica compiled by the radiolaria@mikrotax project team viewed: 3-12-2022

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