radiolaria - rads_cat - Heliodiscus saturnalis radiolaria - rads_cat - Heliodiscus saturnalis

CATALOG OF ORIGINAL DESCRIPTIONS: Heliodiscus saturnalis 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 saturnalis
Other pages this level: << < 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, H. solaster, H. sulcatus, H. trigonodon, H. trochiscus, H. tunicatus, H. zoroaster, H. furcatus, H. setosus

Heliodiscus saturnalis

Citation: Heliodiscus saturnalis Clark & Campbell 1942
taxonomic rank: species
Described on page(s) : p.41
Type specimens: pl.3, figs.9, 9a
Type repository: University of California, Museum of Paleontology, San Francisco
Family (traditional): Heliodiscidae
Family (modern): Heliodiscidae

Current identification:


Original Description

Shell like a sunburst with fourteen triangular, short rays with spreading bases, more or less equal in length and equidistant, tips bluntly pointed; cortical disc smooth, 4.6 times broader than the medullary shell, with small, regular circular pores, about twenty in number in a radius, the openings of the pores flush with the surface, the funnels directed toward the center of the shell; equatorial girdle always narrow, hardly more than a rim in places, but much wider near the bases of the spines or rays, where it is strengthened by three riblets which extend out from the shell up the base of the ray; medullary shell small, globular, with five large, subhexagonal pores set into hexagonal frames across a diameter, bars thin but dense, supporting beams not numerous, thin.

Size:
Diameter of the cortical shell, 200µm; of the medullary shell, 43.0µm; of the pores, 6.6µm; length of rays, 47.4µm.

Extra details from original publication
Distinguishing characters: Heliodiscus saturnalis n. sp. differs from the other species in the obsolete equatorial girdle, which, while demonstrable, especially in some specimens, is not so clear in others. The figured specimen shows little of the girdle.

Editors' Notes
[Junior homonym of Heliodiscus saturnalis Rüst.
The authors here list this species under the subgeneric name Heliodiscomma 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

Rüst, D (1892a). Beitrage zur Kenntnis der fossilen Radiolarien aus Gesteinen der Trias und der palaeozischen Schichten. Palaeontographica. 38: 107-192. gs O


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Heliodiscus saturnalis compiled by the radiolaria@mikrotax project team viewed: 17-6-2024

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