scholarly journals First record of Ephemeropsis, Coptoclava, Coleoptera inc. sed. and Turfanograpta from Lower Cretaceous paper-shales of the western-most site of Mongolia

Fossil Record ◽  
2000 ◽  
Vol 3 (1) ◽  
pp. 77-86
Author(s):  
H. Jähnichen ◽  
E. Kahlert
Keyword(s):  
Early Cretaceous ◽  
Lower Cretaceous ◽  
Eastern China ◽  
First Record ◽  
Water Beetle ◽  
North Eastern ◽  
Shell Fragment ◽  
Fern Species ◽  
First Time ◽  
Cretaceous Deposits

Nymph-fragments (and detached cerci) of the may-fly <i>Ephemeropsis trisetalis</i> Eichwald and the water-beetle <i>Coptoclava longipoda</i> Ping, a coleopteran and a shell-fragment of the conchostracan <i>Turfanograpta</i> sp. are described for the first time from Lower Cretaceous paper-shales of Bajan-Khongor, Mongolia. The assemblage <i>Lycoptera</i> (fishes included in the Order Osteoglossiformes, Fam. Lycopteridae)-<i>Ephemeropsis-Coptoclava</i> correlates with Lower Cretaceous deposits in Transbaikalia, Mongolia and North-Eastern China. The fern-species <i>Adiantopteris sewardi</i> (Yabe) Vassiljevskaja and <i>Adiantopteris toyoraënsis</i> (Oishi) Vassiljevskaja occur in fine-sandstones of Bajan-Khongor (Jähnichen & Kahlert 1972). Their importance as Early Cretaceous flora-elements is discussed. <br><br> Larvenfragmente und isolierte Cerci der Eintagsfliege <i>Ephemeropsis trisetalis</i> Eichwald und vom Wasserkäfer <i>Coptoclava longipoda</i> Ping, und ein Schalenfragment der Conchostrake <i>Turfanograpta</i> sp. werden erstmalig aus unterkretazischen Dysodilen von Bajan-Khongor in der Mongolei beschrieben. Die Faunengemeinschaft <i>Lycoptera</i> (Fische der Ordnung Osteoglossiformes, Fam. Lycopteridae)-<i>Ephemeropsis-Coptoclava</i> tritt gleichzeitig in unterkretazischen Ablagerungen von Transbaikalien, Mongolei, und im nordöstlichen China auf. Das Vorkommen der Farnspezies <i>Adiantopteris sewardi</i> (Yabe) Vassil-jevskaja und <i>Adiantopteris toyoraënsis</i> (Oishi) Vassiljevskaja in Feinsandsteinen von Bajan-Khongor (Jähnichen & Kahlert 1972) und deren Wichtigkeit als unterkretazische Florenelemente werden diskutiert. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.20000030104" target="_blank">10.1002/mmng.20000030104</a>

scholarly journals A Carcharodontosaurid tooth from the Hasandong Formation (Lower Cretaceous) of South Korea

2020 ◽  
Vol 50 ◽  
pp. 2-10
Author(s):  
Chan-gyu Yun
Keyword(s):  
South Korea ◽  
Early Cretaceous ◽  
North American ◽  
Lower Cretaceous ◽  
Theropod Dinosaur ◽  
Large Size ◽  
Individual Variations ◽  
First Time ◽  
Cretaceous Deposits

A large tooth of theropod dinosaur that was recovered from the Hasandong Formation (Lower Cretaceous; Aptian-Albian) in Daedo island, Hadong Couty, South Gyeongsang Province of South Korea is redescribed. Although the tooth was misidentified as a "Prodeinodon"-like megalosaurid theropod at the first time, detailed comparisons with known theropod dentition anatomy strongly indicate that this tooth belongs to an Acrocanthosaurus-like basal carcharodontosaurid theropod. This referral is supported by its combination of large size, ovoid-shaped cervix outline, mesial carina that does not reach the cervix, labially displaced distal carina and large number of denticles. This tooth is different from other carcharodontosaurid teeth from the same formation in several anatomical aspects (e.g., smaller overall size, presence of transverse lines adjacent to the distal carina, presence of interdenticular sulci in distal carina, denticle densities, crown basal ratio), indicating that carcharodontosaurid diversity in the Early Cretaceous of Korea could have been higher, although these differences may represent positional or individual variations. The presence of Acrocanthosaurus-like theropod teeth (e.g., "Prodeinodon", "Wakinosaurus") from early Cretaceous deposits (Valanginian-Cenomanian) of South Korea, Japan, Mongolia and China indicates that North American Acrocanthosaurus atokensis possibly represents a form that immigrated from the Asia.

scholarly journals An unusual bird (Theropoda, Avialae) from the Early Cretaceous of Japan suggests complex evolutionary history of basal birds

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Takuya Imai ◽  
Yoichi Azuma ◽  
Soichiro Kawabe ◽  
Masateru Shibata ◽  
Kazunori Miyata ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Evolutionary History ◽  
Phylogenetic Analyses ◽  
Eastern China ◽  
First Record ◽  
New Taxon ◽  
Jehol Biota ◽  
North Eastern ◽  
History Of ◽  
Complex Evolutionary History

AbstractThe Early Cretaceous basal birds were known largely from just two-dimensionally preserved specimens from north-eastern China (Jehol Biota), which has hindered our understanding of the early evolution of birds. Here, we present a three-dimensionally-preserved skeleton (FPDM-V-9769) of a basal bird from the Early Cretaceous of Fukui, central Japan. Unique features in the pygostyle and humerus allow the assignment of FPDM-V-9769 to a new taxon, Fukuipteryx prima. FPDM-V-9769 exhibits a set of features comparable to that of other basalmost birds including Archaeopteryx. Osteohistological analyses indicate that FPDM-V-9769 is subadult. Phylogenetic analyses resolve F. prima as a non-ornithothoracine avialan basal to Jeholornis and outgroup of the Pygostylia. This phylogenetic result may imply a complex evolutionary history of basal birds. To our knowledge, FPDM-V-9769 represents the first record of the Early Cretaceous non-ornithothoracine avialan outside of the Jehol Biota and increases our understanding of their diversity and distribution during the time.

scholarly journals First record of Octomacrum europaeum Roman et Bychowsky, 1956 on the gills of spirlin Alburnoides bipunctatus (Bloch, 1782) in north-eastern Europe

2012 ◽  
Vol 49 (3) ◽  
pp. 187-188
Author(s):  
E. Dzika
Keyword(s):  
Eastern Europe ◽  
Original Description ◽  
First Record ◽  
Morphometric Characters ◽  
North Eastern ◽  
First Time

AbstractOctomacrum europaeum (Monogenea: Octomacridae) was collected, for the first time in north-eastern Europe, from the gills of spirlin (Alburnoides bipunctatus). Morphometric characters were compared with those of other populations and conform to the original description of the species.

scholarly journals Whalesuckers and a spinner dolphin bonded for weeks: does host fidelity pay off?

2003 ◽  
Vol 3 (2) ◽  
pp. 1-5 ◽  
Author(s):  
José Martins Silva-Jr ◽  
Ivan Sazima
Keyword(s):  
First Record ◽  
Host Fidelity ◽  
Social Nature ◽  
Eastern Brazil ◽  
Individual Host ◽  
North Eastern ◽  
Fernando De Noronha ◽  
In The Wild ◽  
Spinner Dolphins ◽  
First Time

The whalesucker Remora australis (Echeneidae) is an oceanic diskfish found attached to cetaceans only and its habits are therefore poorly known. At the Fernando de Noronha Archipelago, off North-eastern Brazil, spinner dolphins Stenella longirostris (Delphinidae) regularly congregate in large groups in a shallow bay, which allows for underwater observations of their behaviour and their fish associates. In the course of a broader study of this elusive diskfish, we had the opportunity to made multiple records of two whalesucker couples (three of the fish naturally marked) attached to the same individual dolphin in two different years, over periods of 47 and 87 days respectively. In all the sightings the whalesucker individuals of a couple were recorded side-by-side and positioned on their host’s belly. We surmise that at least one of the couples was a reproductive pair, as the belly of the larger fish was noticeably swollen in the last sighting, and the bulge on its belly was bilateral and extended almost uniformly to the vent, a strong indication of fully mature gonads. Moreover, its size matched those of the mature females of this diskfish species. To our knowledge, this is the first time that attachment fidelity of the whalesucker to any cetacean host is documented in the wild. We hypothesize that attachment fidelity to the same individual host increases the whalesucker’s chance to mate, and suggest further that the highly social nature of the spinner dolphins facilitates encounters between potential mating partners. Our study indicates that host fidelity possibly is not an uncommon feature of the whalesucker behaviour, albeit difficult to recognise. In one of the above recorded whalesuckers the natural marking was a crescentic scar characteristic of the wounds inflicted by the cookiecutter Isistius brasiliensis (Dalatiidae), a first record of the attack of this shark to any diskfish species.

The first record of genus Gryllomorpha Fieber in Romania (Orthoptera: Gryllidae: Gryllomorphinae)

Zootaxa ◽  
2019 ◽  
Vol 4543 (4) ◽  
pp. 581
Author(s):  
IONUȚ ȘTEFAN IORGU ◽  
DRAGAN CHOBANOV ◽  
MARIUS SKOLKA ◽  
RĂZVAN ZAHARIA ◽  
ELENA IULIA IORGU
Keyword(s):  
First Record ◽  
South Eastern ◽  
North Eastern ◽  
First Time

Although the fauna of Dobrogea (south-eastern Romania and north-eastern Bulgaria) is relatively well studied, the discovery of a crevice cricket was quite unexpected. Described from Ukraine and known to occur in Bulgaria, Greece, Turkey, Kazakhstan and possibly Uzbekistan, Gryllomorpha miramae is now recorded for the first time in Romania. 

scholarly journals A new long-tailed basal bird from the Lower Cretaceous of north-eastern China

2014 ◽  
Vol 113 (3) ◽  
pp. 790-804 ◽  
Author(s):  
Ulysse Lefèvre ◽  
Dongyu Hu ◽  
François Escuillié ◽  
Gareth Dyke ◽  
Pascal Godefroit
Keyword(s):  
Lower Cretaceous ◽  
Eastern China ◽  
North Eastern

scholarly journals Illite/smectite diagenesis and thermal evolution of Lower Cretaceous–Paleogene successions in the Dolna Kamchiya Depression, Eastern Bulgaria

2018 ◽  
Vol 47 (1) ◽  
pp. 3-21
Author(s):  
Yavor Stefanov
Keyword(s):  
Lower Cretaceous ◽  
Thermal Evolution ◽  
Clay Fraction ◽  
Foreland Basin ◽  
First Record ◽  
Burial History ◽  
X Ray Diffraction ◽  
Geological Age ◽  
Basin Subsidence ◽  
Cretaceous Deposits

The diagenesis of mixed-layer illite/smectite (I/S) minerals in Lower Cretaceous–Paleogene successions from the Dolna Kamchiya Depression was studied, using X-ray diffraction analysis of the clay fraction (<2 μm) from core samples. The proportion of illite in I/S and degree of ordering increase with depth irrespective of the geological age, indicating that highly expandable I/S compositions were progressively illitized during the burial evolution. Lowest smectite values are recorded in the Lower Cretaceous deposits, whereas in the Paleogene sections are documented great regional variations in the I/S mineralogy, caused by differential basin subsidence. The transition from randomly interstratified (R0) to R1-ordered I/S occurs between depths of 2200 m and 2400 m, and crosscuts the major stratigraphic boundaries. The variable patterns of I/S depth profiles resulted from the combined influence of temperature, burial history, sedimentation and subsidence rates, and basin geodynamic types on diagenesis. The rapid increase in illite content in the I/S clays across the main unconformities reflects the great thickness of eroded sediments during uplift and denudation events and/or elevated heat flow. The reconstructed palaeogeothermal gradient for the Eocene after corrections for decompaction and erosion would correspond to the values for foreland basin settings reported in the literature. Application of the I/S geothermometer to the Lower Cretaceous–Paleogene rocks demonstrates a general trend of increased organic maturity toward southeast in relatively isochronous deposits. The new results appear to be the first record for the effect of a multiphase basin evolution on the smectite illitization in sedimentary successions from the Dolna Kamchiya Depression.

scholarly journals FIRST RECORD OF CALCAREOUS GREEN ALGAE (DASYCLADALES, HALIMEDACEAE) FROM THE PALEOCENE CHEHEL KAMAN FORMATION OF NORTH-EASTERN IRAN (KOPET-DAGH BASIN)

2021 ◽  
pp. 51-64
Author(s):  
FELIX SCHLAGINTWEIT ◽  
KOOROSH RASHIDI ◽  
ABDOLMAJID MOSAVINIA
Keyword(s):  
Shallow Water ◽  
Green Algae ◽  
Benthic Foraminifera ◽  
First Record ◽  
Larger Benthic Foraminifera ◽  
Eastern Iran ◽  
North Eastern ◽  
Kopet Dagh ◽  
First Time ◽  
Upper Paleocene

The micropalaeontological inventory of the shallow-water carbonates of the Paleocene Chehel-Kaman Formation cropping out in the Kopet-Dagh Basin of north-eastern Iran is poorly known. New sampling has evidenced for the first time the occurrence of layers with abundant calcareous green algae including Dasycladales and Halimedaceae. The following dasycladalean taxa have been observed: Jodotella veslensis Morellet & Morellet, Cymopolia cf. mayaense Johnson & Kaska, Neomeris plagnensis Deloffre, Thyrsoporella-Trinocladus, Uteria aff. merienda (Elliott) and Acicularia div. sp. The studied section is devoid of larger benthic foraminifera and can be referred to the middle-upper Paleocene (SBZ 2-4) due to the presence of Rahaghia khorassanica (Rahaghi). Some of the dasycladalean taxa are herein reported for the first time not only from Iran but also the Central Neotethyan realm.

First record of chlorophyte Nephroselmis pyriformis from the north-eastern Mediterranean Sea coast

2015 ◽  
Vol 8 ◽  
Author(s):  
Elif Eker-Develi
Keyword(s):  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
First Record ◽  
Live Cells ◽  
Eastern Mediterranean Sea ◽  
The North ◽  
Video Images ◽  
North Eastern ◽  
First Time ◽  
Sea Coast

Nephroselmis pyriformis(N. Carter) Ettl is reported for the first time from the north-eastern Mediterranean Sea coast. The species was isolated from the samples collected on 21 September 2013. The morphology of live cells is described based on light microscopy. Photographic and video images of the species are also presented.

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