CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinoides japonicus Saito&Maiya 1973
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.
Citation: Globigerinoides japonicus Saito&Maiya 1973taxonomic rank: SpeciesType specimens: PI. 19, figs. 4a-b, 5a-b, 6a-bType sample (& lithostrat): Nishikurosawa FormationType locality: MioceneType repository: Tokyo; National Science Museum, Tokyo, Japan. Duplicate paratypes are deposited in the, U.S.N.M. Washington, D.C.
Current identification:
Original Description Test free, medium in size for the genus, moderately high trochospire, equatorial profile ovoid, equatorial periphery slightly lobulate; axial profile suboval, axial periphery broadly rounded; chambers rounded, inflated, fairly rapidly and almost uniformly increasing in size, four chambers making up each whorl, in all three whorls visible; intercameral sutures depressed, increasingly so during the ontogeny, becoming almost incised between the last few chambers; only two apertures present on the test exterior; primary aperture interiomarginal, a low intraumbilical arch, often with a narrow rim; single spiral supplementary sutural aperture, small hole or crescent-shaped opening with no rim, situated at the junction of the last intercameral suture and spiral sutures; wall calcareous, thick, markedly cancellate and punctate. Size: Maximum diameter of holotype 0.32 mm; paratype (fig. 4a-b) 0.28 mm; paratype (fig. 6a-b) 0.32 mm. Extra details from original publication Remarks: This species is closely related to forms referred by workers to Globigerinoides trilobus (REUSS), G. quadrilobatus (D'ORBIGNY) and G. sacculifer (BRADY), together with various combinations of these names and so-called subspecies. It is distinguished as a separate species because of its single spiral supplementary aperture and a rather high trochospiral test for the genus. There is considerable morphological resemblance between this species and Globigerina woodi JENKINS, although the former has a distinct supplementary aperture and, therefore, belongs to the genus Giobigerinoides. This species has so far been found only in the Nishikurosawa Formation and very little is known about its stratigraphic range and geographic distribution.
References:
Saito, T. & Maiya, S. (1973). Planktonic foraminifera of the Nishikurosawa Formation, northeast Honshu, Japan. Transactions and Proceedings of the Palaeontological Society of Japan. 91(1): 113-125. gs
Globigerinoides japonicus compiled by the pforams@mikrotax project teamviewed: 8-12-2024
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":556375,"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=556375","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.."}
Saito Maiya 1973 pl19 f5.JPG
Saito Maiya 1973 pl19 f4.JPG
Saito Maiya 1973 pl19 f6.JPG
Saito Maiya 1973 pl19 f5.JPG
Saito Maiya 1973 pl19 f4.JPG
Saito Maiya 1973 pl19 f6.JPG
Comments