CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana araratica Martirosyan 1958

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 araratica
Other pages this level: G. adamsi, G. aegyptiaca, G. aegyptiaca duwi, G. alpina, G. andori, G. ansarii, G. appenninica, G. arabica, G. araratica, G. arca caribica, G. arca esnehensis, G. arcaformis, G. aspera, G. asymetrica, G. atlantica, G. aturica, G. azerbaidjanica, G. bahijae, G. bollii, G. bulloides naussi, G. calcarata, G. calcarata arcata, G. calcarata primitiva, G. calcarata retardata> >>

Globotruncana araratica

Citation: Globotruncana araratica Martirosyan 1958
Rank: Species
Type repository: Yerevan; Microbiostratigraphy Laboratory, Institute of Geological Sciences, Yerevan, Armenia

Current identification/main database link: Dicarinella concavata (Brotzen, 1934)

Original Description
Test round, biconvex, ventral side more convex. Three whorls, four-six chambers in each one. Umbilicus open, broad, comprises 1/3 of the test diameter. Peripheral margin broadly scalloped, bears two closely spaced keels. Inter-keel wall becomes narrower in the median part of the chamber, and broader toward the margins. On the dorsal side 2.5-3 whorls are visible, with 4-6 chambers in each. Outline of early chambers sickle-shaped, last three chambers semicircular, surface of chambers flattened. On ventral side outline of initial three chambers rectangular, last three chambers rounded, the first three chambers in addition slightly overlap one another. Umbilical ends of chambers truncated, surrounded by a flange. Keel weakly developed on last chamber. Sutures on dorsal side arcuate, convex, on ventral side straight, depressed. Sutures convex, covered by sutural flanges consisting of fine tubercles. Aperture poorly expressed (filled with matrix).


Martirosyan, Y. A. (1958). Globotruncanas from the Upper Cretaceous deposites of the southwestern part of the Armenian SSR. Akademiya Nauk Armyansk SSR, Isv., ser. Geol Geogr Nauk. 11(6): 9-. gs


Globotruncana araratica compiled by the pforams@mikrotax project team viewed: 30-7-2021

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