radiolaria - rads_cat - Theocyrtis tuberosa radiolaria - rads_cat - Theocyrtis tuberosa

CATALOG OF ORIGINAL DESCRIPTIONS: Theocyrtis tuberosa Riedel 1959

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 -> T -> Theocyrtis -> Theocyrtis tuberosa
Other pages this level: T. aculeata, T. ampla, T. andriashevi, T. careotuberosa, T. diabloensis, T. hirta, T. macroceros, T. mugaicus, T. perpumila, T. perysinos, T. proserpinae, T. ptychodes, T. redondoensis, T. setanios, T. triapenna, T. trimembris, T. tuberosa, T. turris

Theocyrtis tuberosa

Citation: Theocyrtis tuberosa Riedel 1959
taxonomic rank: species
Described on page(s) : p.298
Type specimens: pl.2, figs.10-11
Type repository: Holotype USNM. No. 563374, U.S. National Museum, Washington, D.C.
Family (traditional): Pterocorythidae
Family (modern): Pterocorythidae

Current identification/main database link: Theocyrtis tuberosa Riedel 1959

Original Description

Cephalis elongate, subdivided into three (?) indistinct loculi, with rough surface and subcircular to circular pores. Apical horn short, stout, three-bladed, often irregular in form or forked. Thorax subhemispherical, with pronouncedly tuberose surface due to low irregular protuberances, and subcircular to circular pores showing a tendency to longitudinal alignment. Lumbar stricture indistinct externally. Abdomen subcylindrical, somewhat contracted distally, usually with ragged termination, and having a plicate wall in which adjacent plicae are separated by two to four longitudinal rows of subcircular to circular pores.

(Based on 30 specimens). Length of apical horn 13-50µm; of cephalis 28-50µm; of thorax 83-133µm; of abdomen 38-168µm. Breadth of cephalis 35-45µm; of thorax 120-175µm.

Extra details from original publication
Distinguishing characters: In order to determine whether or not this species might be similar to Theocyrtis ptychodes Haeckel (1887a, p. 1408, pl. 69, fig. 8), the author searched through a large number of Radiolaria from the original sediment sample collected at Challenger Station 272, the type locality of that species. No form was found that resembled Theocyrtis ptychodes, indicating that it must be very rare if present at that locality. The structure of the cephalis of Theocyrtis tuberosa is apparently similar to that described in Anthocyrtidium cineraria Haeckel and Calocyclas virginis Haeckel (Riedel, 1957).


Riedel, W. R. (1959a). Oligocene and Lower Miocene Radiolaria in tropical Pacific sediments. Micropaleontology. 5(3): 285-302. gs


Theocyrtis tuberosa compiled by the radiolaria@mikrotax project team viewed: 21-7-2024

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