scholarly journals Dictyoconus aydimi (Gallardo-Garcia and Serra-Kiel, 2016) nov. comb., larger benthic foraminifera from the middle-upper Eocene of the Middle East (SE Turkey, Iraq, SW Iran, Oman): new evidence for Arabian Plate faunal provincialism

2021 ◽  
Keyword(s):  
Middle East ◽  
Benthic Foraminifera ◽  
Arabian Plate ◽  
Upper Eocene ◽  
Larger Benthic Foraminifera ◽  
Sw Iran ◽  
Se Turkey ◽  
New Evidence

scholarly journals MAASTRICHTIAN LARGER BENTHIC FORAMINIFERA FROM THE ARABIAN PLATE SENSU LATO: NEW DATA FROM SOMALIA, TURKEY, AND IRAN

2020 ◽  
pp. 69-83
Author(s):  
Felix Schlagintweit
Keyword(s):  
Benthic Foraminifera ◽  
Junior Synonym ◽  
Arabian Plate ◽  
Larger Benthic Foraminifera ◽  
Lithostratigraphic Units ◽  
Valid Taxon ◽  
Tarbur Formation ◽  
Se Turkey ◽  
First Time ◽  
Upper Maastrichtian

Larger benthic foraminifera from the upper Maastrichtian Auradu Formation of Somalia exhibit striking matches with the assemblages from the time-equivalent Tarbur Formation of Iran and other, but less well studied lithostratigraphic units in SE Turkey (e.g., Garzan Fm.). Some taxa, among also new ones, described from Somalia need taxonomic updates (revision, synonymy, re-instatement). Dukhania? cherchii Luger is considered a junior synonym of Acordiella? tarburensis Schlagintweit & Rashidi, and Pseudorbitolina schroederi Luger is re-instated and considered a valid taxon, different from the Campanian P. marthae Douvillé of the western Tethyan domain. The genus Cyclopsinella Galloway is reported for the first time from the upper Maastrichtian of Iran.

scholarly journals BROECKINELLA HENSONI N. SP., A NEW LARGER BENTHIC FORAMINIFERA FROM THE UPPER MAASTRICHTIAN OF IRAN AND A REVISION OF THE GENUS BROECKINELLA HENSON, 1948

2020 ◽  
pp. 57-67
Author(s):  
Felix Schlagintweit ◽  
Koorosh Rashidi
Keyword(s):  
Benthic Foraminifera ◽  
Upper Cretaceous ◽  
Test Chamber ◽  
First Record ◽  
Generic Diagnosis ◽  
Larger Benthic Foraminifera ◽  
Zagros Zone ◽  
Sw Iran ◽  
Tarbur Formation ◽  
Upper Maastrichtian

new larger benthic foraminifera is described as Broeckinella hensoni from the upper Maastrichtian Tar-bur Formation of SW Iran (Zagros Zone). In comparison to the type species of the genus, Broeckinella arabica Henson, which also occurs in the Tarbur Formation, the new species has distinctly larger dimensions (e.g., size and thickness of test, chamber height). The first record of a microspheric specimen of B. arabica shows previously unrecorded annular chambers in the final test stage. Therefore, the generic diagnosis is herein emended. In the Tarbur Formation, both B. hensoni n. sp. and B. arabica occur in foraminiferal-algal wackestones. However, B. arabica occurs in a wider range of microfacies, including packstones and grainstones. It is assumed that Broeckinella originated in the Upper Cretaceous with Broeckinella neumannae Gendrot. The upper Albian Broeckinella aragonensis Peybernès is herein transferred to the porcellaneous genus Peneroplis Montfort.

scholarly journals DICTYOCONELLA HENSON, 1948, UPPER CRETACEOUS LARGER BENTHIC FORAMINIFERA: A TAXONOMIC REVISION WITH THE ESTABLISHMENT OF GUSICELLA GEN. NOV. (TYPE-SPECIES DICTYOCONELLA MINIMA HENSON)

2021 ◽  
pp. 3-13
Author(s):  
FELIX SCHLAGINTWEIT ◽  
KOOROSH RASHIDI
Keyword(s):  
Benthic Foraminifera ◽  
Type Species ◽  
Upper Cretaceous ◽  
Taxonomic Revision ◽  
New Combination ◽  
Arabian Plate ◽  
Larger Benthic Foraminifera ◽  
Western Asia ◽  
Mass Extinction Event ◽  
Tarbur Formation

In his monograph on Mesozoic-Cenozoic Larger Benthic Foraminifera from the area of Middle East and south-western Asia, Henson (1948) erected the genus Dictyconella for more or less "compressed-conical" dictyoconids including D. complanata (type-species) and D. minima. Both are however, structurally completely different, e.g. aligned (in the latter) versus alternating structural elements (in the former), and cannot either belong to the same genus or the same subfamily (Dictyoconinae versus Dictyorbitolininae). Therefore, the new genus Gusicella is erected with the type-species Dictyoconella minima, resulting in the new combination Gusicella minima. Gusicella represents the only taxon of the Dictyorbitolininae in the Upper Cretaceous Global Community Maturation Cycle of Larger Benthic Foraminifera (here: conical agglutinated). Due to the revision, Dictyoconella is described as a monospecific genus and an assumed Maastrichtian newcomer which, like Gusicella, became extinct shortly afterwards, namely at the K-Pg boundary mass-extinction event. Both taxa appear to be restricted to the former Arabian Plate of the southern Neotethyan margin. The new data provided are based on material from the Maastrichtian Tarbur Formation of southwestern Iran (Zagros Zone).

Larger Benthic Foraminifera from the Panna and Mukta Fields Offshore India: Paleobiogeographical Implications

2019 ◽  
Vol 49 (3) ◽  
pp. 243-258
Author(s):  
Laura J. Cotton ◽  
V. Paul Wright ◽  
Andrew Barnett ◽  
Willem Renema
Keyword(s):  
Shallow Water ◽  
Benthic Foraminifera ◽  
Late Eocene ◽  
Marine Biodiversity ◽  
Upper Eocene ◽  
Larger Benthic Foraminifera ◽  
Geographic Ranges ◽  
Extinction Event ◽  
Global Events ◽  
Insight Into

Abstract A previously undocumented, diverse assemblage of very shallow-water larger benthic foraminifera (LBF) is described from the Panna-Mukta fields, offshore India. This location lies at the margin of the late Eocene to early Miocene Arabian Peninsula marine biodiversity hotspot. The assemblage has similar characteristics to those from the Middle East, Oman and Turkey, but shares little in common with onshore western Indian assemblages. In addition, the material contains several unusual and possibly new taxa, and extends the geographic ranges of several existing LBF. The succession spans the Eocene and Oligocene, with an unconformity between the middle and upper Eocene. As such it offers insight into the response of shallow-water taxa to the Eocene–Oligocene Transition extinction event from an unusual setting in a little studied region. Our data show that LBF taxonomic richness in the Panna Mukta fields is comparable with highly diverse assemblages found in Oman, indicating it may be an eastward extension of this high diversity region. Moreover, significant decreases in diversity are seen between the middle and upper Eocene and the upper Eocene and Oligocene. Major extinctions are known to occur in global LBF records at both of these levels, and the Panna Mukta succession therefore further confirms these are global events, extending across the platform and having a dramatic (at least short-term) effect on high biodiversity regions.

scholarly journals BROECKINELLA HENSONI N. SP., A NEW LARGER BENTHIC FORAMINIFERA FROM THE UPPER MAASTRICHTIAN OF IRAN AND A REVISION OF THE GENUS BROECKINELLA HENSON, 1948

2020 ◽  
pp. 51-61 ◽  
Author(s):  
FELIX SCHLAGINTWEIT ◽  
KOOROSH RASHIDI
Keyword(s):  
Benthic Foraminifera ◽  
Upper Cretaceous ◽  
Test Chamber ◽  
First Record ◽  
Generic Diagnosis ◽  
Larger Benthic Foraminifera ◽  
Zagros Zone ◽  
Sw Iran ◽  
Tarbur Formation ◽  
Upper Maastrichtian

A new larger benthic foraminifera is described as Broeckinella hensoni from the upper Maastrichtian Tarbur Formation of SW Iran (Zagros Zone). In comparison to the type species of the genus, Broeckinella arabica Henson, which also occurs in the Tarbur Formation, the new species has distinctly larger dimensions (e.g., size and thickness of test, chamber height). The first record of a microspheric specimen of B. arabica shows previously unrecorded annular chambers in the final test stage. Therefore, the generic diagnosis is herein emended. In the Tarbur Formation, both B. hensoni n. sp. and B. arabica occur in foraminiferal-algal wackestones. However, B. arabica occurs in a wider range of microfacies, including packstones and grainstones. It is assumed that Broeckinella originated in the Upper Cretaceous with Broeckinella neumannae Gendrot. The upper Albian Broeckinella aragonensis Peybernès is herein transferred to the porcellaneous genus Peneroplis Montfort.

scholarly journals Neorotalia omanensis and Operculina musawaensis from the Sultanate of Oman

2013 ◽  
Vol 18 ◽  
pp. 41
Author(s):  
Abdul Razak Siddiq Al-Sayigh
Keyword(s):  
New Species ◽  
Middle East ◽  
Benthic Foraminifera ◽  
Middle Eocene ◽  
Planktonic Foraminifera ◽  
Early Eocene ◽  
Sultanate Of Oman ◽  
Larger Benthic Foraminifera ◽  
Oman Mountains ◽  
Two New Species

Two new species of larger benthic foraminifera, Neorotalia omanensis n. sp. and Operculina musawaensis n. sp. are described and illustrated from the eastern Oman Mountains. N. omanensis n. sp. occurs in the Musawa Formation in association with the planktonic foraminifera Morozovella edgari and Truncarotaloides topilensis indicating an early to middle Eocene age (P10-P13). Operculina musawaensis n. sp. occurs in the Abat Formation in association with the planktonic foraminifera Acarinina esnaensis and A. soldadensis indicating an early Eocene age (P6).  This is the first known record showing the presence of genus Neorotalia in the Middle East. Representatives of the larger foraminiferal genus Linderina sp. are also described and illustrated from the Musawa Formation and compared with the published Linderina species in the surrounding countries.  

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