CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana postrugosa Vasilenko 1961

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 -> Globotruncana -> Globotruncana postrugosa
Other pages this level: << < G. lugeoni angulata, G. lunaris, G. marginata austinensis, G. marianosi, G. mariei, G. mayaroensis, G. mexicana, G. monmouthensis, G. morozovae, G. nakkadyi, G. naqibi, G. navarroensis, G. neotricarinata, G. orientalis, G. pessagnoi, G. postrugosa, G. poststephensoni, G. pozaryskae, G. pseudoconica, G. pseudofornicata, G. pura, G. pustulifera, G. putahensis, G. qabeliatensis, G. quadrata, G. renzi, G. repanda, G. riojai, G. roddai, G. rosetta insignis, G. rosetta pettersi, > >>

Globotruncana postrugosa

Citation: Globotruncana postrugosa Vasilenko 1961
Rank: Species

Current identification/main database link: Globotruncana bulloides Vogler, 1941


Original Description
Translation from the Russian.]--Test convex with lobate and angular outline; initial whorls more convex, but protrude very weakly. On the dorsal side the chambers of the initial whorls are spherical and round, rapidly increase in size; granules on the first whorl small, not very distinct, in the later chambers of the second whorl take the form of unclear swellings without tuberculate incrustations; chambers of the last whorl flat, increase in size unevenly, strongly slanted toward the peripheral margin; last chamber often smaller than the two preceding; septal sutures radial, depressed between the chambers of the first whorl and arcuate, with convex tuberculate flanges between the remaining chambers; toward the end of the last whorl both the septal sutures and the dorsal keels become narrower and lose their tubercles. On the ventral, strongly flattened side the chambers are rounded-reniform, strongly inflated, but with flattened vertices; chambers increase in size very little toward the end of the whorl; septal sutures closed by flanges and depressed only between the last chambers; umbilical flanges and ventral keels merge into short ovals of almost equal size, forming a regular rosette pattern on the flattened ends of the chambers on the ventral side. Peripheral margin broad, very strongly inclined toward the ventral side. so that the dorsal keel stands above the ventral one as a distinct cornice, and it can be seen in ventral view that the diameter of the dorsal side is greater than that of the ventral one. The gap between keels is concave, ventral keels and umbilical flanges are broad and tuberculate at first, toward the end of the whorl become flat and compressed; both keels in general parallel.

References:

Vasilenko, V. P. (1961). Upper Cretaceous foraminifera of the Mangyshlak Peninsula. Vses. Neft. Nauchno-Issled. Geol-Razved. Inst (VNIGRI), Trudy. 171: 160-161. gs


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Globotruncana postrugosa compiled by the pforams@mikrotax project team viewed: 27-2-2020

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