radiolaria - rads_cat - Sethocyrtis principii longispina

CATALOG OF ORIGINAL DESCRIPTIONS: Sethocyrtis principii longispina 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 -> S -> Sethocyrtis -> Sethocyrtis principii longispina
Other pages this level: << < S. elegans, S. expositus, S. japonica, S. laguncularis, S. menelai, S. mica, S. minimus, S. mitrus, S. multiplicatus, S. ovalis, S. oxycephalis, S. parva, S. parvissimus, S. pirum, S. porrectus, S. principii longispina, S. principii principii, S. principii valgrandensis, S. pyrum, S. rara, S. simus, S. sinitzini, S. tamdiensis, S. tintinabulum, S. vialovi

Sethocyrtis principii longispina

Citation: Sethocyrtis principii longispina Clark & Campbell 1942
Rank: sub-species
Described on page(s) : p.76
Type specimens: pl.7, fig.13
Type repository: University of California, Museum of Paleontology, San Francisco
Family (traditional): Theoperidae
Family (modern): Theopilidae

Current identification:

Original Description

Shell small, similar in practically all shell characters to S. principii principii n. subsp. save in the character of the apical horn; apical horn greatly elongated, 0.4 total length, conical (12°), tip bluntly pointed.

Length 167µm; of apical horn, 67.0µm; of cephalis, 24.5µm; diameter of widest part of thorax, 83.5µm; of pores, 10.0µm. Distinguishing characters (rw): This subspecies is very close to S. principii principii n. subsp. and differs from it in the character of the apical horn which is 0.4 total length as against 0.06 total length. In other respects the two subspecies are identical and are separated in this report mainly upon the character of the horn.



Latin longus + spina -ae = long spine

Extra details from original publication

Editors' Notes


Clark, B. L. & Campbell, A. S. (1942). Eocene radiolarian faunas from the Mt. Diablo area, California. Geological Society of America, Special Papers. 39: 1-112. gs


Sethocyrtis principii longispina compiled by the radiolaria@mikrotax project team viewed: 2-7-2022

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