CATALOG OF ORIGINAL DESCRIPTIONS: Blefuscuiana mitra Banner&Desai 1988
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 The test is a low trochospire with five to six chambers in each of three whorls. The spiral side is evolute and flat; the chambers are normally subglobular, only the last one or two becoming radially subovoid and with increasingly depressed sutures. The intercameral sutures are subradial on both the spiral and umbilical sides. The umbilicus has a breadth equal to about 20% of the test diameter. The aperture is a low arch extending from the umbilicus to the periphery of the previous whorl and extending over it into the spiral suture in the last formed chamber; the aperture has a porticus extending from the umbilicus (where it is broadest) to the periphery but not beyond it. The surface of the test is smooth and microperforate (external perforations about 0.6 microns in diameter); a narrow imperforate zone may be present in the spiral suture where the aperture encroaches on to the spiral side. Etymology: Mitra, a mitre, or turban-like head-dress; with reference to the shape of the last formed chambers. Extra details from original publication Remarks. Like B. speetonensis, B. mitra shows a tendency towards planispirality in the last few chambers but it is distinguished by its smaller umbilicus, consistently more globular chambers, which are typically fewer in each whorl, and by the high, cowl-like or mitre-like doming of the last chambers (which never leads to elongation as in Lilliputianella).
We have not been able to identify this species with any previously described, but specimens found by Obregon (1959) from the Late Aptian cabri zone of Mexico may be conspecific (they are not referable to Globigerina infracetacea; compare Glaessner, 1966).
References:
Banner, F. T. & Desai, D. (1988). Banner, F. T. & Desai, D. (1988). A review and revision of the Jurassic-Early Cretaceous Globigerinina,with especial reference to the Aptian assemblages of Speeton (North Yorkshire, England). Journal of Micropalaeontology. 7: 143-185. Journal of Micropalaeontology. 7: 143-185. gs
Blefuscuiana mitra compiled by the pforams@mikrotax project teamviewed: 19-6-2025
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":812286,"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=812286","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