CATALOG OF ORIGINAL DESCRIPTIONS: Lithopera thornburgi Sanfilippo & Riedel 1970

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 -> L -> Lithopera -> Lithopera thornburgi
Other pages this level: L. amblyostauros, L. ananassa, L. bacca, L. baueri, L. biaurita, L. biaurita [nomen nudum], L. bursella, L. circopora, L. crassa, L. elongata, L. globosa, L. gutta, L. lagena, L. magna, L. neotera, L. nicobarica, L. nicobarica [nomen nudum], L. niduspendulum, L. oceanica, L. ovata, L. oxystauros, L. pyrum, L. renzae, L. renzae spiculosa, L. rossica, L. setosa, L. thornburgi

Lithopera thornburgi

Citation: Lithopera thornburgi Sanfilippo & Riedel 1970
Rank: species
Type specimens: pl.2, figs.4-6
Type repository: Holotype USNM 167352. P43/0
Described on page(s) : p.455
Family (traditional): Theoperidae
Family (modern): Eucyrtidiidae

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Current identification/main database link: Lithopera thornburgi Sanfilippo & Riedel 1970

Original Description
Spindle-shaped shell, tapering equally at both ends. Cephalis spherical, apparently poreless, completely enclosed in the spongy thoracic wall. Thorax spindle-shaped. tapering and closing distally, sometimes with a short terminal spine or acute cone. No third segment distinguished. Thoracic wall thick, of spongy meshwork, especially in the proximal half. The thoracic wall adjacent to the cephalis is of spongy meshwork and has some straight, rodlike elements developed within and projecting from it which are probably the primary spines.

(Based on 35 specimens) Total length 140-285µm. Maximum breadth usually 85-135µm, but rarely to 150µm. Distinguishing characters (rw): This species is distinguished from L. baueri by the facts that both ends are usually equally tapered and pointed. the cephalis is enclosed in the thoracic wall, and the thoracic wall is always spongy.
As is occasionally the case in L. baueri, in some specimens of L. thornburgi a change to smaller pores near the distal end of the thorax is associated with a change in contour, which is. however, not accompanied by an internal ring, such as would mark off a third segment (plate 2, figure 5).

Etymology: This species is named after Russell B. Thornburg senior vice-president of Global Marine Inc. in charge of the Oceanics Division.


Sanfilippo, A. & Riedel, W. R. (1970). Post-Eocene "closed" theoperid radiolarians. Micropaleontology. 16(4): 446-462. gs


Lithopera thornburgi compiled by the radiolaria@mikrotax project team viewed: 17-5-2021

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