CATALOG OF ORIGINAL DESCRIPTIONS: Lithopera renzae 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 renzae
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 renzae

Citation: Lithopera renzae Sanfilippo & Riedel 1970
Rank: species
Type specimens: pl.1, figs.21-23, 27
Type repository: Holotype, fig.22 AMPH 6P, 60-62 cm.; USNM 167338, X44/3
Described on page(s) : p.453
Family (traditional): Theoperidae
Family (modern): Eucyrtidiidae

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

Original Description
Subellipsoidal shell. of which the thorax forms the major part. Cephalis spherical. usually with small circular pores, half or more of it enclosed in the thoracic wall. with a small apical horn. Collar stricture not usually pronounced externally. From the base of the cephalis, primary lateral and dorsal spines extend in the thoracic wall or within the thoracic cavity to join the inner surface of the upper wall. Remainder of shell subellipsoidal, with pores very irregular in size and arrangement. tending to form a spongy meshwork especially in the upper part of the thorax. In some specimens the thoracic wall is not actually spongy, but the pores are divided by secondary bars. Inverted-hemispherical or inverted-conical abdomen usually separated from the larger thorax by a distinct stricture and change in contour.

(Based on 30 specimens) Maximum breadth 80-110┬Ám. Ratio of length of abdomen to length of thorax (measured from base of cephalis) (0.01-1.3):1. usually (0.3-0.7):1. Distinguishing characters (rw): L. renzae is distinguished from L. baueri by its less spongy meshwork, smaller size, and a lumbar stricture usually accompanied by a change in contour. It is distinguished from L. neotera as indicated under that species, and from Stichocorys diploconus by having a spongy wall and only three segments.

Etymology: This species is named for Miss G. W. Renz, a student of polycystine radiolarians who contributed to the early phase of the research leading to this paper.

Editors' Notes
[The authors here list this species under the subgeneric name Lithopera and include the subgeneric name in the species name.


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


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

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