CATALOG OF ORIGINAL DESCRIPTIONS: Rugoglobigerina Brönnimann 1952
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.
Original Description Test either Hantkenina-like or distinctly Globigerina- like, almost planispiral to trochoidal. Chambers of Hantkenina type with axially situated spines, those of Globigerina type rounded peripherally, truncate toward umbilicus. Sutures straight to slightly curved in direction of coiling. Apertures large, arcuate, directed toward umbilicus, occasionally with liplike projections. Umbilicus subcircular, as a rule large, deep, with covering plate. Surface ornamented by rugosities of various size and type, either distributed irregularly or arranged in rows radiating from a central point on the surface toward the aperture (meridional pattern). Extra details from original publication Remarks: The Upper Cretaceous genus Rugoglobigerina contains the hantkeninoid subgenus Plummerella and the Globigerina-like subgenus Rugoglobigerina, both of which carry the characteristic rugose surface, which in typical forms displays a peculiar meridional pattern, A further indication of relationship of these two subgenera is the occurrence of spines in the early stages and truncate Globigerina chambers in the late ontogenetic stages of some species. The covering plate across the umbilicus was not found in PlummereJla, but from the general morphology of the tests its presence has to be expected in v.-ell-preserved specimens. The genus Rugoglobigerina differs from all other Cretaceous and Tertiary Globigerinas by the strongly rugose, as a rule regularly ornamented surface, by a covering plate across the umbilicus, and by the development of hantkeninoid chambers and of truncate Globigerina chambers, with large arcuate apertures directed toward the umbilicus.
Occurrence: Upper Cretaceous, Trinidad, B. W. I., Eastern Venezuela, Texas, U. S. A., and Egypt.
References:
Brönnimann, P. (1952c). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletins of American Paleontology. 34(140): 1-70. gs
Rugoglobigerina compiled by the pforams@mikrotax project teamviewed: 11-10-2024
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":496121,"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=496121","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.."}
Comments