Catalog - Globigerina varianta Catalog - Globigerina varianta

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina varianta Subbotina 1953

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.


Higher levels: pf_cat -> G -> Globigerina -> Globigerina varianta
Other pages this level: << < G. triloculinoides nanus, G. triloculinoides parva, G. tripartita tapuriensis, G. trivialis, G. tschikryzovi, G. tumbili, G. turbulenta, G. turcmenica, G. turritilina praeturritilina, G. turritilina turritilina, G. tuschepsensis, G. umbilicata, G. umbrica, G. uruchaensis, G. utilisindex, G. varianta, G. velascoensis, G. velascoensis compressa, G. venezuelana, G. vignalii, G. voluta, G. wagneri, G. washitensis, G. weissi, G. wilsoni, G. wilsoni bolivariana, G. winkleri, G. woodi, G. woodi connecta, G. woodi extrema, G. yeguaensis> >>

Globigerina varianta

Citation: Globigerina varianta Subbotina 1953
taxonomic rank: Species
Type specimens: 3994
Type locality: Zone of rotaliiform Globorotalia, Elburgan Fm., Kuban River section, North Caucasus
Type repository: St. Petersburg, Russia; VNIGRI

Current identification/main database link: Parasubbotina varianta (Subbotina 1953)


Original Description

"Shell globigerinelliform plano-convex, oval outline, consisting of 2 whorls with 4 chambers to the last whorl, rapidly increasing in size and closely packed together. The chambers to the last whorl, as is usual in the genus, are strongly inflated. Dorsal side compressed, ventral convex. The chambers on the dorsal side are clearly defined and compressed whereas on the ventral side they are inflated and hemispherical. The last chamber is particularly large and is almost spherical. Sutures short, very slightly curved almost straight. On the dorsal side they are not deeply incised, on the central side they are strongly incised. Peripheral margin broadly rounded and coarsely scalloped. Umbilicus always distinct though small and having the form of a shallow depression in the middle of the ventral surface. Orifice slit-like, usually with small, indistinct lips forming a lamelliform border to the slit. Orifice along marginal suture. Dimensions: diameter 0.28-0.50 mm, thickness 0.12-0.24 mm."

References:

Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. 1-252. gs

Olsson, R. K., Pearson, P. N. & Huber, B. T. (2006c). Taxonomy, biostratigraphy, and phylogeny of Eocene Catapsydrax, Globorotaloides, Guembelitrioides, Paragloborotalia, Parasubbotina, and Pseudoglobigerinella n. gen. In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 5): 67-110. gs O

Subbotina, N. N. (1953). Foraminiferes fossiles d'URSS Globigerinidae, Globorotaliidae, Hantkeninidae. Bureau de Recherches Geologiques et Minieres. 2239: 1-144. gs


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Globigerina varianta compiled by the pforams@mikrotax project team viewed: 23-4-2024

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