CATALOG OF ORIGINAL DESCRIPTIONS: Cyrtocapsa campi 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 -> C -> Cyrtocapsa -> Cyrtocapsa campi
Other pages this level: C. bicornis, C. brevicornis, C. campi, C. chrysalidium, C. colatractus, C. compacta, C. cornuta, C. costata, C. diploconus, C. fusulus, C. gadzhiliensis, C. hexagona, C. hirta, C. inaequispina, C. inflata, C. laevigata, C. lavallei, C. longicornis, C. macropora, C. marinellii, C. miocenica, C. miocenica imperforaticauda, C. miocenica laevicauda, C. osculum, C. poligonalis, C. pyrum, C. rothpletzi, C. strangulata, C. subconica, C. tetrapera

Cyrtocapsa campi

Citation: Cyrtocapsa campi Campbell & Clark 1944
Rank: species
Type locality: LL462
Type age (chronostrat): Late Cretaceous, Mesozoic.
Type specimens: pl.8, figs.14-17, 20
Type repository: University of California, Museum of Paleontology, Berkeley, Holotype: Slide No.. 34520, 34538.
Repository city: San Francisco
Described on page(s) : p.43

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Current identification:

Original Description
Shell small, generally spindle- or bomb-shaped with sharp apex; apical horn a tiny, conical stub with sharp tip; cephalis (first joint) nearly twice as long as horn, conical; thorax (second joint), abdomen (third joint), and postabdomen (remaining 3 joints) in strict contour (83°, shortly 50°, later 15° in longer portion including 3-5 joints, and finally inversely 30°-95° where shell rounds to antapical end), without transverse indentations, with only a little lateral bulge in each joint, particularly latter ones, 5 transverse joints marked by narrow, horizontal septal bands, all joints regularly increased in width and diameter from apical to opposite end, the sixth joint subhemispherical, closed off at free end and with a tiny, conical, teatlike projection (not a basal spine, and possibly open); wall uniformly thin save in cephalis where it is somewhat thicker; surface smooth; pores of nearly similar size except in sixth joint where they are largest, perhaps progressively larger from apical end to last joint, some pores crossing the septal bands, in 2-7 indefinitely regular, transverse rows of 12-24 pores in a row, except, again, in cephalis where there are fewer pores widely scattered, all pores well-spaced, distinct, shallow, generally circular.

Size: Length, total, 165µm, of sixth joint, 50µm; diameter, maximum, at base of sixth joint, 80µm, of pores, 4.4-6.6µm.

Etymology: No information given

Extra details from original publication
Distinguishing features: Cyrtocapsa campi n. sp., differs from other described species in number of joints, 5, in contrast to 4, 7, or 8 joints on other forms. Rüst (1885, pl. 17, fig. 11) figures a sectioned fragment of a shell somewhat like our species, as C. ovalis from the Ju

Editors' Notes
The authors here list Cyrtocapsa campi under the subgeneric name Cyrtocapsoma and include the subgeneric name in the species name.[comment from RadWorld database]


Campbell, A. S. & Clark, B. L. (1944b). Radiolaria from Upper Cretaceous of middle California. Geological Society of America, Special Papers. 57: 1-61. gs


Cyrtocapsa campi compiled by the radiolaria@mikrotax project team viewed: 12-4-2021

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