CATALOG OF ORIGINAL DESCRIPTIONS: Lithopera baueri 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 baueri
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 baueri

Citation: Lithopera baueri Sanfilippo & Riedel 1970
Rank: species
Type specimens: pl.2, figs.1-2
Type repository: Holotype USNM 167343, G49/1.
Described on page(s) : p.455
Family (traditional): Theoperidae
Family (modern): Eucyrtidiidae

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

Original Description
Elongate. approximately ellipsoidal shell, somewhat tapering toward the cephalis and usually rounded but rarely flattened distally. Cephalis small. spherical. poreless or sparsely porous, sometimes partly enclosed by the thoracic wall, in some specimens with a small apical spine. From the base of the cephalis, primary lateral and dorsal spines extend in the proximal part of the thoracic wall of some specimens. Thorax closed distally, usually rounded, sometimes tapered but less acutely than toward the cephalis, and in some specimens with one or more small, irregular terminal spines. No third segment distinguished. Proximally, the thoracic wall is of loose spongy meshwork in most specimens, but in some it is lamellar, though with characteristically irregular and divided pores; distally (occasionally set off by a change in contour) the thoracic wall has smaller, more regular pores.

(Based on 30 specimens) Total length 125-220µm. Maximum breadth 80-125µm. Distinguishing characters (rw): This species is distinguished from L. renzae by having no third segment, and by the thorax usually being longer and more spongy. It is distinguished from L. thornburgi by the generally more rounded termination of the shell. and by the proximal part of the spongy thoracic wall not being sufficiently thick to enclose the cephalis.

Etymology: This species is named after Robert F. Bauer, chairman of the board of Global Marine Inc.

Editors' Notes
Rare specimens of an enigmatic form (plate 2, figure 3) with very irregular, commonly subdivided thoracic pores, occur in the samples tabulated from core JYN V 20P, which is stratigraphically well below the lower limit of typical Lithopera baueri. Although this form superficially resembles L. baueri and L. renzae to some extent, insufficient specimens have been found to establish its relationships.


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


Lithopera baueri compiled by the radiolaria@mikrotax project team viewed: 12-4-2021

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