Abstract
The present study deals with the paleontology, stratigraphy, paleogeography and paleoenvironment of the sixteen representatives of the Paleogene agglutinated benthic foraminifer Monothalamana of eight genera: Bathysiphon Sars, Orbulinelloides Saidova, Repmanina Suleymanov, Miliammina Heron-Allen & Earland, Agglutinella El-Nakhal, Dentostomina Cushman, Ammomassilina Cushman, Psammolingulina Silvestri. One species Orbulinelloides kaminskii is believed here to be new. As a whole these faunae are rarely described in the micropaleontological literatures, that’s why this study is detected. The recorded species are distributed on both sides of the Northern Tethys (Hungary, France), Southern Tethys (Egypt, UAE, Pakistan), Pacific and Atlantic Ocean. It seems that the changes in paleoceanographic conditions should accentuate the benthic faunal changes. Some of the recorded species are mostly confined to that mention localities in the Atlantic and Pacific Ocean, Northern and Southern Tethys, and it was recorded by a few authors. The deeper water species have smooth tests, while the shallow water specimens are coarser grained. The number differences of the recorded species between the different localities in the Tethys may be due to one or more parameters: the deficiency of available literatures, differences in ecological or environmental conditions (depth, salinity, water temperature, dissolved oxygen, nutrient, land barrier) and not homogeneity in the generic or species concept according to different authors.
Highlights
An attempt has been made to study holotypes and hypotypes of sixteen species of eight Paleogene Monothalaminid agglutinated genera as possible in connection with the original descriptions and figures
The figured form of is treated here to the genus Orbulinelloides (Kaminski and Huang, 1991). It differs from the Bartonian-Priabonian O. arabicus Anan and Ypresian-Lutetian O. sztrakosae Anan in its less scattered large apertures without elevated on projection and older stratigraphic occurrence from Ypresian
The following remarks of the paleogeographic distribution of the recorded species can be added: 1. Thirteen of the identified agglutinated species are recorded from the Southern Tethys 13/16: Pakistan 5/16, Egypt 3/16, and UAE 3/16
Summary
An attempt has been made to study holotypes and hypotypes of sixteen species of eight Paleogene Monothalaminid agglutinated genera as possible in connection with the original descriptions and figures. The identified fauna was recorded from both sides of the Tethys which originally described from some Tethyan localities: Egypt, UAE, Pakistan (Southern Tethys), France, Hungary (Northern Tethys), Atlantic and Pacific Ocean (Figure 1, 2). The intent of this study is to bring together many data scattered in the literature under a unifying theme of these genera that originally erected from the Tethys, Atlantic and Pacific Oceans, and to detect its paleontology, stratigraphy, paleoenvironment and paleogeographic distribution of them, in the both sides of the Tethys
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