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.
Current identification/main database link: Subbotina eocaena (Guembel 1868)
[Translation from Russian using google translate] Description. The shell is large sub-triangular or oval in shape: elongation factor 1.1, expansion coefficient 1.3-1.4. The initial part consists of 1.5-2 spiral turns. The first is rotary-shaped and composed of 4-7 chambers; the second is a globigeral-shaped of four chambers. Navigation is high trochoid. The shell is high, strongly swollen from the ventral and weakly convex from the dorsal side. In the last turn there are 4 cameras, of which the latter two are significantly larger than the previous two. The width of the last chamber is slightly greater than or equal to the width of the penultimate one. The ratio of the length of the base of the last chamber to its width is 1.1-1.2; the height of the last chamber is equal to or greater than the height of the earlier part of the spiral. Chambers on the abdominal side are subtreuthal, swollen, their arrangement is compact. The seams are slightly indented, wide. The navel is wide and shallow and distinct. The outer edge is broad-blade, slightly dissected. The mouth is an open slit, located under the overhanging inner edge of the last chamber, and extends from the center of the umbilical region to the side of the shell. The wall is smooth, finely porous. [Translation from Russian using google translate] Variability. The shape of the shell is variable, as well as the degree of compactness of the location of the chambers of the last revolution. Comparison from Globigerina pseudoeocaena Subbotina this species is distinguished by the shape and size of the shell, as well as the structure and location of the mouth. Geological and geographical distribution. Middle Eocene Aral Sea area, Ustyurt, Turkmenistan and the Caucasus. Material. 40 Specimens.
Original Description
Extra details from original publication
Сравнение. От Globigerina pseudoeocaena Subbotinа данный вид отличает форма и размер раковины, а также строение и распо.lожение устья.
Геологическое и географическо е распространение. Средний эоцен Приаралья , Устюрта, Туркмении и Предкавказья.
Материал. 40 экземпляров.
Kurgalimova, G. G. (1972). Описание некоторых характерных глобигерин из среднеэоценовых отложений Восточного Приаралья [Description of some characteristic globigerinids from Middle Eocene deposits of the Eastern Aral Sea region]. In, Paleontological collection, Proceedings of the All-Union Scientific Research Geological Prospecting Petroleum Institute (VNIGNI). 4(83): 109-115. gsReferences:
Globigerina rustica compiled by the pforams@mikrotax project team viewed: 7-10-2024
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