CATALOG OF ORIGINAL DESCRIPTIONS: Calocyclas semipolita robusta 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.
Calocyclas (Calocyletta) semipolita robusta Clark and Campbell 1942.jpg
Calocyclas semipolita robusta
Citation: Calocyclas semipolita robusta Clark & Campbell 1942Taxonomic rank: sub-speciesDescribed on page(s) : p.84Type specimens: pl.8, fig.21Type repository: University of California, Museum of Paleontology, San FranciscoFamily (traditional): TheoperidaeFamily (modern): Lophocyrtiidae
Original Description Shell short and squat, with equal thorax and abdomen; cephalis knoblike, sub-globular (0.5 length of horn) with rather less tightly pinched off base than in C. semipolita semipolita n. subsp., its sides a little convex and subparallel, its apex with a relatively long horn (nearly 0.33 total length), the horn generally conical, the distal 0.67 narrowed, needlelike, the proximal part wider (approximately 10°), circular in section, the tip sharp, the base simply crowning the cephalis without local modification; thorax only about twice the length of the cephalis, very strongly hemispherical, rather clearly symmetrical, with strong, convex sides which reach the greatest diameter at the middle and contract proximally to a narrow, internal band as in C. semipolita semipolita n. subsp., this stricture emphatic of the bulges of both thorax and abdomen below and producing the effect of much greater constriction than actually occurs; abdomen generally convex, only a trifle longer than the thorax (not much longer than the apical horn), with considerable swelling toward the middle as the thorax, with much local swelling and contraction along its length, and with generally subcylindrically contracted aperture, the two sides of the abdomen not locally modified in the same way at the same level; aperture with ten or a dozen, triangular, subequidistant, divergent, rather distinct and fairly large teeth, these teeth more prominent than in C. semipolita semipolita n. subsp.; wall rather thick; other structural characters, especially of the pores, closely resembling those of C. semipolita semipolita n. subsp. Size: Length of shell, 187.5µm; of horn, 50µm; of cephalis, 25µm; of thorax, 50µm; diameter of stricture, 78µm; of aperture, 56.5µm. Extra details from original publication Distinguishing characters: This subspecies differs from C. semipolita semipolita n. subsp. in generally shorter shell, horn with wide basal segment, and, especially in the subequality of thorax and abdomen. It is closer to C. amicae Haeckel (1887) than the main species in some regards but differs from that species not only in shape of thorax but also in having a conical rather than bladed apical horn. Editors' Notes [The authors here list this species under the subgeneric name Calocycletta 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
Calocyclas semipolita robusta compiled by the radiolaria@mikrotax project teamviewed: 25-3-2025
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
Although the administrator will attempt to moderate comments, it is impossible for every comment to have been moderated at any given time.
You acknowledge that all comments express the views and opinions of the original author and not those of the administrator.
You agree not to post any material which is knowingly false, obscene, hateful, threatening, harassing or invasive of a person's privacy.
The administrator has the right to edit, move or remove any comment for any reason and without notice.
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
{"commentics_url":"\/\/www.mikrotax.org\/comments\/","page_id":696552,"enabled_country":true,"country_id":0,"enabled_state":false,"state_id":0,"enabled_upload":false,"maximum_upload_amount":3,"maximum_upload_size":5,"maximum_upload_total":5,"captcha":true,"captcha_url":"https:\/\/www.mikrotax.org\/comments\/frontend\/index.php?route=main\/form\/captcha&page_id=696552","cmtx_wait_for_comment":"cmtx_wait_for_comment","lang_error_file_num":"A maximum of %d files are allowed to be uploaded","lang_error_file_size":"Please upload files no bigger than %.1f MB in size","lang_error_file_total":"The total size of all files must be less than %.1f MB","lang_error_file_type":"Only image file types are allowed to be uploaded","lang_text_loading":"Loading ..","lang_placeholder_country":"Country","lang_placeholder_state":"State","lang_text_country_first":"Please select a country first","lang_button_submit":"Add Comment","lang_button_preview":"Preview","lang_button_remove":"Remove","lang_button_processing":"Please Wait.."}
 semipolita robusta Clark and Campbell 1942.jpg)
Calocyclas (Calocyletta) semipolita robusta Clark and Campbell 1942.jpg semipolita robusta Clark and Campbell 1942.jpg)
Calocyclas (Calocyletta) semipolita robusta Clark and Campbell 1942.jpg
Comments