CATALOG OF ORIGINAL DESCRIPTIONS: Spongotrochus echinodiscus 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.
Spongotrochus (Stylospongidium) echinodiscus Clark and Campbell 1942.jpg
Spongotrochus echinodiscus
Citation: Spongotrochus echinodiscus Clark & Campbell 1942Taxonomic rank: speciesDescribed on page(s) : p.48Type specimens: pl.2, fig.3Type repository: University of California, Museum of Paleontology, San FranciscoFamily (traditional): SpongodiscidaeFamily (modern): Stylodictyidae
Current identification:
Original Description Shell circular, cakelike, with piercing spines around the disc and some on the broad face; spongy disc with about eight faint, concentric, annular rings of about equal breadth; peripheral region regularly spongy with no trace of annuli; pores relatively small, of several sizes scattered irregularly, the pores subcircular, framework with rather thick bars, dense; radial beams about sixteen piercing the edge, and a few scattered ones at about 0.25 of the diameter of the disc from the edge on the broad surface of the disc, all spines short, rodlike, cylindrical, tips blunt, bases not expanded, apparently without hooklets. Size: Diameter of disc, 266µm; of pores, 6.6-8.8µm. Extra details from original publication Distinguishing characters:Spongotrochus echinodiscus n. sp. has more concentric rings than S. scutella Haeckel (1887), and the radial spines are limited to the periphery of the broad face of the disc. There are fewer, shorter, radial spines than in S. parma Haeckel (1887). Editors' Notes [The authors here list this species under the subgeneric name Stylospongidium 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
Spongotrochus echinodiscus compiled by the radiolaria@mikrotax project teamviewed: 13-6-2025
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