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.  

The incidence of unusual test morphologies of Eocene Larger benthic foraminifera: An example of Paleogene Adriatic Carbonate Platform

2021 ◽  
Author(s):  
Vlasta Ćosović ◽  
Jelena Španiček ◽  
Katica Drobne ◽  
Ervin Mrinjek
Keyword(s):  
Benthic Foraminifera ◽  
Carbonate Platform ◽  
Middle Eocene ◽  
Morphological Diversity ◽  
Late Eocene ◽  
Early Eocene ◽  
Coralline Red Algae ◽  
Larger Benthic Foraminifera ◽  
Shallow Marine ◽  
Scientific Project

<p>The Paleogene Adriatic carbonate platform(s) existed within the Central NeoTethys (around 32 N paleolatitude) from the Danian to the late Eocene (Bartonian/Priabonian) and produced a succession of limestones up to 500 m thick, rich in larger benthic foraminifera (LBF). The Eocene sediments are widely distributed along the eastern Adriatic coast and have been studied for many years. Taking into account the climatic changes that took place within the Eocene (Early Eocene and Middle Eocene climatic optima, known as EECO, MECO), special attention was paid to the composition of shallow-marine foraminiferal assemblages. The studies reveal the following trends: (1) the alveolinid-dominated assemblages were replaced by nummulitid-dominated assemblages around the MECO; (2) the greater species and morphological diversity (spherical, ellipsoid, extremely elongated fusiform) of the alveolinid fauna was evident at the EECO; (3) the nummulitid-dominated fauna was characterized by less diversified assemblages compared to the alveolinid ones and by the co-occurrence of scleractinian corals, coralline red algae and aborescent foraminifera. The occurrence of twin embryos has been assigned to the early Eocene in the alveolinid populations, especially in Alveolina levantina and A. axiampla (in some sections, the frequency is greater than 5%), and these coalesced embryos have the same size as the single form (usually they are smaller). The LBF assemblages of Middle Eocene showed a greater frequency of doubled adult tests (Orbitolites sp., Nummulites sp.). The origin of these unusual morphologies is poorly known, usually described as the results of stressful conditions. Considering the timing of the appearance of such morphologies, temperature and associated changes in the shallow-marine environment could be the cause.</p><p>This study is carried out as part of the scientific project IP-2019-04-5775 BREEMECO, funded by Croatian Scientific Foundation.</p>

scholarly journals The bees of Early Eocene Cambay amber (Hymenoptera: Apidae)

2013 ◽  
pp. 1 ◽  
Author(s):  
Michael S. Engel ◽  
Jaime Ortega-Blanco ◽  
Paul C. Nascimbene ◽  
Hukam Singh
Keyword(s):  
New Species ◽  
Middle Eocene ◽  
Baltic Amber ◽  
Early Eocene ◽  
New Subgenus ◽  
Two New Species

The fauna of bees known from Early Eocene (Ypresian) Cambay amber are reviewed.  Presently only three species have been recovered, all from among the corbiculate Apinae and representing the extinct tribes Electrapini and Melikertini, and all from genera known from the slightly younger middle Eocene Baltic amber.  A single, poorly-preserved and fragmentary female of an unidentifiable species of Protobombus Cockerell is recorded.  Two new species of the genus Melikertes Engel are documented, one representing a new subgenus, Paramelikertes Engel & Ortega-Blanco, as is a third, fragmentary melikertine of uncertain identity.  The new species are Melikertes (Paramelikertes) gujaratensis Engel & Ortega-Blanco, new species, and M. (Melikertes) kamboja Engel & Ortega-Blanco, new species.

To the origin of Lake Baikal endemic gammarid radiations, with description of two new Eulimnogammarus spp.

Zootaxa ◽  
2020 ◽  
Vol 4766 (3) ◽  
pp. 457-471
Author(s):  
VICTORIA N. MOSKALENKO ◽  
TATIANA V. NERETINA ◽  
LEV Y. YAMPOLSKY
Keyword(s):  
New Species ◽  
Lake Baikal ◽  
Middle Eocene ◽  
Nuclear Genes ◽  
Ancestral State ◽  
Fresh Waters ◽  
Two New Species ◽  
Basal Position ◽  
Molecular Characters

Extraordinarily diverse morphologically and ecologically, Lake Baikal’s two endemic gammaroidean amphipod clades are both firmly placed within the paraphyletic genus Gammarus, based both on morphological and molecular characters. However, the exact placement of the two Baikal clades remains elusive, making reconstruction of the ancestral state of Baikal endemic radiation difficult. We sequenced 2 mitochondrial and 3 nuclear genes from several species of each of the two clades aiming to represent early branches of the radiation. We also describe two new species of Baikal gammarids, Eulimnogammarus etingovae sp. nov. and Eulimnogammarus tchernykhi sp. nov., with some morphology suggestive of basal position within the radiation. We confirm the two previously demonstrated Baikal clades, but cannot unequivocally support any of the previous hypotheses about affinities of the two Baikal clades within palearctic Gammarus species. Rather, it appears that the two Baikal endemic radiations separated from the rest of freshwater Palearctic forms early and rapidly, probably as part of gammarid diversification during colonization of fresh waters in Middle Eocene. 

Two new panurgine bee (Hymenoptera: Andrenidae) species from the Near- and Middle East

Zootaxa ◽  
2004 ◽  
Vol 715 (1) ◽  
pp. 1 ◽  
Author(s):  
SÈBASTIEN PATINY
Keyword(s):  
New Species ◽  
Middle East ◽  
Morphological Characteristics ◽  
Two New Species

Two new species of Panurginae, Clavipanurgus gusenleitneri sp.nov. and Flavomeliturgula schwarziana sp.nov., are described from Near and Middle East. Their morphological characteristics and geographical distributions are discussed with respect to what is typical for the two genera in the concerned region.

New species of the rare early Eocene creodont Galecyon and the radiation of early Hyaenodontidae

2011 ◽  
Vol 85 (2) ◽  
pp. 315-336 ◽  
Author(s):  
Shawn P. Zack
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
North American ◽  
Type Species ◽  
New Records ◽  
North American Species ◽  
Early Eocene ◽  
Two New Species ◽  
Stratigraphic Position ◽  
Stratigraphic Range

Galecyon is one of the first appearing hyaenodontid creodonts, as well as one of the most poorly known. New specimens greatly improve our understanding of the morphology of this early Eocene genus, thereby enhance knowledge of the earliest radiation of Hyaenodontidae, and include the first associated upper dental remains, as well as fragmentary cranial remains. The new records substantially expand the stratigraphic range of the genus and allow recognition of two new species. The first, Galecyon peregrinus n. sp., is a small, early species that includes the first records of Galecyon from the earliest Eocene Wa-0 interval. The second, Galecyon chronius n. sp., is a large, terminal species, represented by numerous specimens that extend the range of the genus into the late Wasatchian. The type species, G. mordax, is restricted to specimens that are intermediate in size and stratigraphic position. Phylogenetic analysis of early hyaenodontids confirms the monophyly of Galecyon and places it basal to Prolimnocyon, Prototomus, and Pyrocyon. Arfia is identified as the earliest diverging hyaenodontid sampled, contrasting with prior support for a more crownward position. Prototomus martis is more closely allied to Pyrocyon than to other species of Prototomus. The three North American species of Galecyon form a probable anagenetic lineage.

New records of predaceous midges from the Middle East, with the description of two new species (Diptera: Ceratopogonidae)

Zootaxa ◽  
2013 ◽  
Vol 3753 (2) ◽  
pp. 133 ◽  
Author(s):  
PATRYCJA DOMINIAK ◽  
ALICJA ALWIN ◽  
WOJCIECH GIŁKA
Keyword(s):  
New Species ◽  
Middle East ◽  
New Records ◽  
Two New Species
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