CATALOG OF ORIGINAL DESCRIPTIONS: Heliodiscus inca 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.
Heliodiscus (Heliodiscetta) inca Clark and Campbell 1942.jpg
Heliodiscus inca
Citation: Heliodiscus inca Clark & Campbell 1942taxonomic rank: speciesDescribed on page(s) : p.38Type specimens: pl.3, fig.17Type repository: University of California, Museum of Paleontology, San FranciscoFamily (traditional): HeliodiscidaeFamily (modern): Heliodiscidae
Original Description Shell like a sunburst with nine very long conical rays (in one specimen eight), about four times longer than the basal diameter, tips sharp, round in cross section, mostly equidistant; cortical shell lenticular, strongly biconvex, with small circular pores sunken below elevated concave rims with sepaloid points, these points rarely bifurcated distally and giving to the shell a thorny appearance, the points breaking the continuity of the edge, about fifteen or more pores across a diameter and three to five or more in the interradii, cavity of the pores cylindrical, and that of the surrounding calyx concave, wall thin; medullary shell small (less than 0.25 diameter of the cortical shell), extremely dense so that its structure cannot be made out clearly, supporting beams hyaline, few, apparently corresponding to the rays in number, bars of the cortical framework thin. Size: Diameter of the cortical shell, 180µm; of medullary shell, 43µm; of pores, 10µm; length of rays, 85µm; width of wall, 6.6µm. Extra details from original publication Distinguishing characters:Heliodiscus inca n. sp. has long rays, while the other species of this collection have shorter rays. Editors' Notes [The authors here list this species under the subgeneric name Heliodiscetta 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
Heliodiscus inca compiled by the radiolaria@mikrotax project teamviewed: 10-12-2024
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":555108,"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=555108","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.."}
 inca Clark and Campbell 1942.jpg)
Heliodiscus (Heliodiscetta) inca Clark and Campbell 1942.jpg inca Clark and Campbell 1942.jpg)
Heliodiscus (Heliodiscetta) inca Clark and Campbell 1942.jpg
Comments