radiolaria - rads_cat - Phormocampe alamedaensis

radiolaria - rads_cat - Phormocampe alamedaensis radiolaria - rads_cat - Phormocampe alamedaensis

CATALOG OF ORIGINAL DESCRIPTIONS: Phormocampe alamedaensis 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 -> P -> Phormocampe -> Phormocampe alamedaensis

Other pages this level: P. alamedaensis, P. alamedaensis tenuis, P. campanula, P. conus, P. eucalyptra, P. lamprocyclas, P. metalis, P. mitra

Phormocampe (Cyrtocorys) alamedaensis Campbell and Clark 1944.jpg

Phormocampe alamedaensis

Citation: Phormocampe alamedaensis Campbell & Clark 1944

Taxonomic rank: species

Described on page(s) : p.37

Type specimens: pl.7, fig.41

Type age (chronostrat): Late Cretaceous, Mesozoic.

Type locality: LL462

Type repository: University of California, Museum of Paleontology, Berkeley, Holotype: Slide No.34534.

Repository city: San Francisco

Current identification/main database link: Amphipternis alamedaensis

Original Description

Shell rather large, tall, narrow, and generally conical (20-25°); cephalis (primary joint) inflated and like a prominent knob or handle; thorax, abdomen, and postabdomen (terminal 6 or 8 joints) generally similar in shape, increased regularly in diameter and breadth from initial to ultimate end, except penultimate joint which is relatively largest, and out of proportion with others, shell joints distinctly separated by transverse septal bands, individual indentations on each side of bands, and by separate median bulges which give lateral contour character of a saw edge, joints sometimes asymmetrical; ultimate joint incurved, with free edge having numerous (about 22), tiny, triangular teeth; wall uniformly thin; surface trim; pores uniformly subcircular, increased in diameter relative to joint in which they lie, with smallest at cephalic end, but wholly lacking in cephalis, and in penultimate joint they are smaller in diameter than in joints immediately above and below, pores shallow, distinctly separated and well spaced in the clear shell material, about 12-16 around joint, and in 5-6 vertical tiers, usually in subregular (mildly spiral) rows in either direction.

Size:

Length, total (upward to 200µm diameter, maximum, 80µm, of pores (the largest), 8.8µm.

Etymology:

No information given

Extra details from original publication

Distinguishing features: Phormocampe alamedaensis, n. sp., differs from P. mitra (Haeckel, 1887) in having more joints (the latter species with 5), a different cephalis, and in lacking apical horn. It differs from the other described species of the subgenus, P. conus (Haeckel, 18

Editors' Notes

The authors here list Phormocampe alamedaensis under the subgeneric name Cyrtocorys and include the subgeneric name in the species name.[comment from RadWorld database]

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

Phormocampe alamedaensis compiled by the radiolaria@mikrotax project team viewed: 15-5-2025

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=258895 Go to Archive.is to create a permanent copy of this page - citation notes

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