radiolaria - rads_cat - Heliodiscus heliasteriscus radiolaria - rads_cat - Heliodiscus heliasteriscus

CATALOG OF ORIGINAL DESCRIPTIONS: Heliodiscus heliasteriscus 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 -> H -> Heliodiscus -> Heliodiscus heliasteriscus
Other pages this level: H. apollinis, H. asteriscoides, H. asteriscus, H. charlestonensis, H. cingillium brevispina, H. cingillum, H. cingillum brevispina, H. echiniscus, H. glyphodon, H. grottensis, H. heliasteriscus, H. hexasteriscus, H. inca, H. lentis, H. linckiaformis, H. marginatus, H. ninae, H. pentasteriscus, H. perplexus, H. pertusus, H. polymorphus, H. quadratus, H. saturnalis, H. saturnalis [junior homonym], H. saturnalis jh, H. siculus> >>

Heliodiscus heliasteriscus

Citation: Heliodiscus heliasteriscus Clark & Campbell 1942
taxonomic rank: species
Described on page(s) : p.39
Type specimens: pl.3, figs.10,11
Type repository: University of California, Museum of Paleontology, San Francisco
Family (traditional): Coccodiscidae
Family (modern): Coccodiscidae

Current identification/main database link: Periphaena heliasteriscus (Clark and Campbell 1942)


Original Description

Shell like a sunburst with 10 very short rays wider than long or about the same width as the length, their proximal regions sometimes with a few (two or three) riblets, the rays three-angled in proximal portion, the tips sharp, often curved; cortical shell over five times the diameter of the medullary shell, with small, regular, circular pores, about twenty in a radius or fewer, the pores set into shallow pits with sepaloid points prolonged as. minute spinules, an average of about ten or less in an interradius, cavity of the pores cylindrical, these cavities asymmetrical, directed toward the center of the disc; medullary shell a little greater in diameter than the length of a ray, globular, with few, thick, dense bars and subhexagonal pores set into hexagonal frames; supporting beams obscured by the density of the cortical shell, but thin.

Size:
Diameter of cortical shell, 210µm; of medullary shell, 38.6µm; of pores, 8.8µm; length of rays, 29.8µm; width of ray at the base, 32.0µm (at its contact with the disc).

Etymology:
Latin helios + asteriscus, i

Extra details from original publication
Distinguishing characters: A second specimen (Pl. 3, fig. 11) is smaller, but all the spines save one are broken off near the tips. The fine pores are well shown in the specimen.
Heliodiscus heliasteriscus n. sp. has as few rays as the minimum number found in H. pertusus Haeckel (1887), but these rays are shorter, wider, and not fenestrated.

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

References:

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


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Heliodiscus heliasteriscus compiled by the radiolaria@mikrotax project team viewed: 30-5-2024

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=251327 Go to Archive.is to create a permanent copy of this page - citation notes



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