Siphocampe minuta

Taxonomy

Catalog entries: Lithocampe minuta

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.
Remarks on original description: [The authors here list this species under the subgeneric name Lithocampula and include the subgeneric name in the species name.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

Plot of occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
• Taxon plotted: Siphocampe minuta, synonyms included - Lithomitrella minuta; Siphocampe minuta; Theocampe minuta;
• See also space-time plot :: Samples map :: Parent: Siphocampe

Siphocampe minuta compiled by the radiolaria@mikrotax project team viewed: 19-9-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=205388 Go to Archive.is to create a permanent copy of this page - citation notes

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