CATALOG OF ORIGINAL DESCRIPTIONS: Spongurus smithi Campbell & Clark 1944

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 -> S -> Spongurus -> Spongurus smithi
Other pages this level: S. biconstrictus, S. biconstrictus triangulatus, S. bilobatus, S. cauleti, S. crispus, S. crowleysensis, S. cylindricus, S. cylindricus jh, S. elongatus, S. illepidus, S. irregularis, S. occidentalis, S. ovatus, S. phalanga, S. pylomaticus, S. pylomaticus borealis, S. radians, S. saxeus, S. smithi, S. spatulaeformis, S. spongechinus, S. stoehri, S. stuparius, S. stypticus, S. tricolus, S. yatsuoensis

Spongurus smithi

Citation: Spongurus smithi Campbell & Clark 1944
Rank: species
Type specimens: pl.3, fig.4
Type repository: No holotype designated, slides at University of California, Museum of Paleontology, San Francisco
Described on page(s) : p.21
Family (traditional): Spongodiscidae
Family (modern): Euchitoniidae

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Current identification:


Original Description
Shell three-jointed, spatula-shaped; with two similar, opposite, knoblike lobes, each lobe mildly convex at free end, straight contracted (30°) along sides, and with a narrowed fixed base which is 0.59 in maximum width, lobes with their maximum width at 0.67 of their own length from base; middle section biconvex, 0.48 total length in length, widest at exact middle(where it equals lobes), and narrowed (18°) from that level to contracted necks; surface of shell with small prongs or thorns along sides and free ends of lobes and along sides of middle section; meshwork of small, subcircular alveolelike pores and relatively thick bars; internally shell very dense.

Length, 170µm; maximum width 28.4µm. Distinguishing characters (rw): Spongurus smithis n. sp. close to Upper Eocene species, spatulaeformis (1942) from central California but differs in size, median swelling, shape of lobes, and density of interior; Eocene species is its possible progenitor. Lack of long radial spines proves that it is not a denuded Spongocorc.

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

References:

Campbell, A. S. & Clark, B. L. (1944a). Miocene radiolarian faunas from southern California. Geological Society of America, Special Papers. 51: 1-76. gs

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Spongurus smithi compiled by the radiolaria@mikrotax project team viewed: 27-1-2021

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