CATALOG OF ORIGINAL DESCRIPTIONS: Lithocampe minuta Clark & Campbell 1942

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 -> Lithocampe -> Lithocampe minuta
Other pages this level: << < L. eminens, L. fimbriata, L. fusiformis, L. galea, L. globicephala, L. granulata, L. heptacola, L. hexacola, L. hirundo, L. lagena, L. latissima, L. lineata, L. marylandica, L. meta, L. micropyla, L. minuta, L. modeloensis, L. modeloensis longa, L. multipora, L. multipora jh, L. nephelos, L. octocola, L. ovata, L. ovum, L. polycola, L. punctata, L. radicula, L. sinuosum, L. solida [nomen nudum], L. solitaria, L. stiligera> >>

Lithocampe minuta

Citation: Lithocampe minuta Clark & Campbell 1942
Rank: species
Type specimens: pl.9, fig.17
Type repository: University of California, Museum of Paleontology, San Francisco
Described on page(s) : p.93
Family (traditional): Artostrobiidae
Family (modern): Artostrobiidae

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Current identification/main database link: Siphocampe minuta (Clark and Campbell 1942)


Original Description
Shell small, smooth, with only faint strictures, thimble-shaped, and with a toothed margin; shell divided in five joints or segments; apical segment longer than the others (approximately 0.45 total length), somewhat asymmetrically shaped, much like a finger-cot, its apex rounded, its apical half almost conical or domelike, the proximal remainder nearly cylindrical, with six tiers of extremely small, well-separated pores; remaining segments of shell four in number, circular, gradually increasing in diameter and width toward the aperture save the last one which bears the contracted aperture, the contour unaltered at the lines of union between the segments which are faint lines and chiefly marked by the rows of rather prominent pores; one row of pores on the upper edge of each segment, about twenty pores in a row, these pores well-separated, very small although larger than those of the apical segment, oval, wall otherwise hyaline and subuniformly thin, perhaps a little thicker in the ultimate segment; last segment of shell contracted, but the maximum diameter of the shell is reached at its upper margin, its opening the shell aperture; margin of aperture with approximately twenty, small, incurved, conical teeth.

Length of shell, 95.8µm; of apical segment, 43.0µm; breadth, maximum, 49.6µm; (at lower edge of penultimate segment); of aperture, 38.6µm; diameter of pores, 2.2-4.4µm. Distinguishing characters (rw): Lithocampe minuta n. sp. differs from L. radicula Ehrenberg (1838) (Barbados) and L. ventricosa Haeckel (1887) = (Stöhr 1880 = Dictyomitra ventricosa) (Sicily, Calanisetta) in having fewer segments and in smaller size.

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

References:

Clark, B. L. & Campbell, A. S. (1942). Eocene radiolarian faunas from the Mt. Diablo area, California. Geological Society of America, Special Papers. 39: 1-112. gs


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Lithocampe minuta compiled by the radiolaria@mikrotax project team viewed: 27-2-2021

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