Catalog - Globotruncana erevanica

CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana erevanica 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 erevanica
Other pages this level: << < G. churchi, G. citae, G. coldreriensis, G. concavata cyrenaica, G. conica, G. conica plicata, G. contusa galeoidis, G. contusa patelliformis, G. contusa scutilla, G. contusa witwickae, G. convexa, G. culverensis, G. dentata, G. dorreeni, G. dupeublei, G. erevanica, G. falsocalcarata, G. falsostuarti, G. fareedi, G. flexuosa, G. fornicata, G. fornicata ackermanni, G. fornicata cesarensis, G. fornicata globulocamerata, G. fornicata manaurensis, G. fornicata motai, G. fornicata plummerae, G. fresnoensis, G. fundiconulosa, G. gagnebini, G. gansseri> >>

Globotruncana erevanica

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

Current identification/main database link: Globotruncana linneiana (d'Orbigny 1839)

Original Description
Test oval-rounded, wide, with parallel flattened sides. Two whorls, six chambers in the last one. Two keels nicely visible, divided by a flat inter-keel wall. Inter-keel surface of test is a ribbon-like belt which is of uniform width for its whole extent. Peripheral margin slightly scalloped in different parts. Two whorls visible on dorsal side, six chambers in the last whorl, first whorl indiscernible. Chambers flattened, circular to semicircular in outline. Chambers of first whorl strongly differ in size from those of second whorl (ratio of whorls is as 1 to 3). Size of chambers within each whorl increases gradually. The chambers of the second whorl have a weakly tuberculate surface ornamentation. On the ventral side six chambers are also visible. Chambers are also flattened, semicircular in outline. Umbilical ends of the chambers rounded. Wall finely perforate. Sutures on both sides arcuately curved, broad, raised above the test surface. Umbilicus narrow, open. Aperture indiscernible.


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 erevanica compiled by the pforams@mikrotax project team viewed: 19-9-2021

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