Kimmeridgian and early Tithonian cephalopods from the Kisújbánya Limestone Formation, Zengővárkony (Mecsek Mountains, southern Hungary), their faunal composition, palaeobiogeographic affinities, and taphonomic character

2021 ◽  
Vol 21 (13) ◽  
pp. 265-314
Author(s):  
László Bujtor ◽  
Richárd Albrecht ◽  
Csaba Farkas ◽  
Bertalan Makó ◽  
Dávid Maróti ◽  
...  
Keyword(s):  
Late Jurassic ◽  
First Record ◽  
Internal Mould ◽  
Weathering Processes ◽  
Shell Fragment ◽  
Long Time ◽  
First Time ◽  
Upper Kimmeridgian ◽  
Ammonite Zones ◽  
Lower Kimmeridgian

A new collection at Zengővárkony (Mecsek Mountains, Hungary) provided a rich and diverse but poorly preserved cephalopod-dominated fossil assemblage representing the Kimmeridgian and the lower Tithonian. The material came from mixed scree, soil, and amongst roots affected by weathering processes having been exposed to the elements for a long time. The nautiloid Pseudaganides strambergensis is the first record from the Mecsek Mountains. Due to the weathering, the ammonite fauna consists of mainly fragmentary and dissolved individuals that comprises 528 specimens belonging to 34 species and 30 genera out of which 20 species and 15 genera are reported for the first time from the Mecsek Mountains. The fauna includes specimens of known taxa. No new taxa are introduced. Based on the comparison with other faunas, this assemblage most closely resembles the fauna of the Venetian Alps (Italy). Additional faunal elements include aptychi (Laevaptychus latus, Lamellaptychus murocostatus), belemnites (Hibolithes semisulcatus), and an indetermined brachiopod. The first record of Spiraserpula spirolinites, an encrusting fossil polychaete preserved on the internal mould of a Taramelliceras shell fragment indicates favourable bottom conditions for the epifauna. The presence of Aspidoceras caletanum, Gravesia aff. gigas, and Pseudowaagenia inerme indicates faunal connections with the Submediterranean Province of the Tethys, which is in line with the tectonic and palaeogeographical position of the Mecsek Zone during the Late Jurassic. The ammonite assemblage represents elements of five Tethysian ammonite zones of the Kimmeridgian and Tithonian. The lower Kimmeridgian Herbichi Zone is indicated by Streblites tenuilobatus and Praesimoceras herbichi. The upper Kimmeridgian Acanthicum Zone is indicated by Aspidoceras acanthicum, and the Cavouri Zone by Mesosimoceras cavouri and Aspidoceras caletanum. The upper Kimmeridgian Beckeri Zone is suggested by Hybonoticeras pressulum and Pseudowaagenia inerme. Whereas Gravesia aff. gigas, Lithacoceras aff. siliceum, and Malagasites? denseplicatus are faunal elements characterising the Early Tithonian Hybonotum Zone. Phylloceratid and lytoceratid specimens account only for 12% of the fauna, while the majority of the specimens belong to the Oppeliidae and Ataxioceratidae (60%).

First records of Somalinautilus (Cephalopoda: Nautiloidea) from the Jurassic of Southern Germany – inferences for trans-provincial migrations

2020 ◽  
Vol 298 (2) ◽  
pp. 137-146
Author(s):  
Günter Schweigert
Keyword(s):  
Sea Level ◽  
Geographic Distribution ◽  
Middle Jurassic ◽  
Late Jurassic ◽  
Southern Germany ◽  
First Time ◽  
Lower Kimmeridgian ◽  
Lower Bathonian

The Late Jurassic nautiloid Somalinautilus antiquus (Dacqué, 1910), previously only known by the holotype from Lower Kimmeridgian strata of Ethiopia, is reported from the Lower Kimmeridgian (Platynota Zone) of Southern Germany. This unexpected record largely expands the known geographic distribution of this species. Another species of Somalinautilus, S. clavifer Tintant , 1994, is recorded for the first time from the Middle Jurassic (Lower Bathonian, Zigzag Zone) of Southern Germany. A short stratigraphic and palaeogeographic review of Somalinautilus occurrences is provided. Faunal migrations of nautiloids over large distances were probably triggered by sea- level highstands and/or palaeocurrents.

scholarly journals Revision of the Late Jurassic teleosaurid genus Machimosaurus (Crocodylomorpha, Thalattosuchia)

2014 ◽  
Vol 1 (2) ◽  
pp. 140222 ◽  
Author(s):  
Mark T. Young ◽  
Stéphane Hua ◽  
Lorna Steel ◽  
Davide Foffa ◽  
Stephen L. Brusatte ◽  
...  
Keyword(s):  
Late Jurassic ◽  
Total Body Length ◽  
Coastal Marine ◽  
Geological Age ◽  
Northeastern France ◽  
Total Body ◽  
Upper Kimmeridgian ◽  
A New Species ◽  
Lines Of Evidence ◽  
Lower Kimmeridgian

Machimosaurus was a large-bodied genus of teleosaurid crocodylomorph, considered to have been durophagous/chelonivorous, and which frequented coastal marine/estuarine ecosystems during the Late Jurassic. Here, we revise the genus based on previously described specimens and revise the species within this genus. We conclude that there were three European Machimosaurus species and another taxon in Ethiopia. This conclusion is based on numerous lines of evidence: craniomandibular, dental and postcranial morphologies; differences in estimated total body length; geological age; geographical distribution; and hypothetical lifestyle. We re-diagnose the type species Machimosaurus hugii and limit referred specimens to only those from Upper Kimmeridgian–Lower Tithonian of Switzerland, Portugal and Spain. We also re-diagnose Machimosaurus mosae , demonstrate that it is an available name and restrict the species to the uppermost Kimmeridgian–lowermost Tithonian of northeastern France. We re-diagnose and validate the species Machimosaurus nowackianus from Harrar, Ethiopia. Finally, we establish a new species, Machimosaurus buffetauti , for the Lower Kimmeridgian specimens of France and Germany (and possibly England and Poland). We hypothesize that Machimosaurus may have been analogous to the Pliocene–Holocene genus Crocodylus in having one large-bodied taxon suited to traversing marine barriers and additional, geographically limited taxa across its range.

scholarly journals Biostratigraphy of Upper Jurassic of the Valy clay pit (Samarskaya Luka) by ammonites, ostracods and dinocysts

2021 ◽  
Vol 66 (3) ◽  
Author(s):  
Mikhail A. Rogov ◽  
◽  
Julia N. Savelieva ◽  
Olga V. Shurekova ◽  
◽  
...  
Keyword(s):  
Upper Jurassic ◽  
Ecological Analysis ◽  
Central Russia ◽  
Short Time ◽  
First Time ◽  
The Village ◽  
Upper Kimmeridgian ◽  
Biostratigraphic Units ◽  
Lower Kimmeridgian ◽  
Samarskaya Luka

The results of integrate biostratigraphic study of Upper Jurassic deposits of the clay pit near the village of Valy (Syzran district, Samara region) are presented. For the first time a bed-by-bed description was made and the subdivision of the section into zones, subzones and biohorizons by ammonites was established. Bauhini and Kitchini zones (Bayi subzone) are established in the Lower Kimeridgian, while Upper Kimmeridgian is represented by Autissiodorensis zone only. In the Lower Volgian Sokolovi and Pseudoscythica zones were recognized, while the Middle Volgian is represented by the Panderi zone. The age of the regionally developed unconformity at the base of the Trazovo Formation has been clarified. As in the sections located to the south from studied section, this unconformity is located in the base of the Autissiodorensis zone, overlying different Oxfordian and lower Kimmeridgian. For the first time for Kimmeridgian of Central Russia in the marlstone band of the Kitchini zone (bayi biohorizon) solitary corals conditionally attributed to the genus Trochocyathus were found. Along with corals other warm-water taxa (belemnites Hibolithes, rare ammonites Taramelliceras) were found in the same bed, suggesting deposition of this bed during the short-time warming event. 6 biostratigraphic units (zone and beds with fauna) were recognized by ostracods, along with 2 dinocyst-based units (assemblage and zone) which are compared with the stratigraphic subdivisions by these groups, previously proposed for the Kimeridgian and Volgian stages of the Russian Platform. The paleo-ecological analysis has allowed to assume, that sediments have accumulated in the conditions of warm shallow eutrophic basin with depth to 50 m, with gradual increase of eutrophy through time. At some levels, short-term episodes of severe shallowing or freshening are recorded by ostracods.

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>

First record of two rare spider crabs (Crustacea: Decapoda: Brachyura: Majoidea) from Brazil

Zootaxa ◽  
2019 ◽  
Vol 4688 (1) ◽  
pp. 111-118
Author(s):  
FLAVIO DE ALMEIDA ALVES-JÚNIOR ◽  
DÉBORA LUCATELLI ◽  
WILLIAM SANTANA ◽  
JESSER FIDELIS DE SOUZA-FILHO
Keyword(s):  
Gulf Of Mexico ◽  
Continental Slope ◽  
Endemic Species ◽  
Rio Grande ◽  
First Record ◽  
Potiguar Basin ◽  
First Occurrence ◽  
Long Time ◽  
First Time

In this paper we report the first occurrence of two rare spider crabs (Majoidea) from Brazil, with additional morphological information based on material collected in the upper continental slope of the Potiguar Basin, northeast of Brazil. Lepteces ornatus Rathbun, 1893 (Epialtidae), originally described from the Gulf of Mexico and also reported from Uruguay, is now recorded from Brazilian waters (off Rio Grande do Norte), whereas Collodes leptocheles Rathbun, 1894 (Inachoididae) was considered for a long time as an endemic species of Gulf of Mexico and herein is being recorded for the first time in the Southern Atlantic.  

Direct imaging of charge transfer

1996 ◽  
Vol 54 ◽  
pp. 680-681
Author(s):  
Yimei Zhu ◽  
J. Tafto
Keyword(s):  
Charge Transfer ◽  
Electron Diffraction ◽  
Scattering Amplitude ◽  
High Temperature Superconductors ◽  
Charge Carriers ◽  
Image Charge ◽  
Net Charge ◽  
Long Time ◽  
Electron Holes ◽  
First Time

The electron holes confined to the CuO2-plane are the charge carriers in high-temperature superconductors, and thus, the distribution of charge plays a key role in determining their superconducting properties. While it has been known for a long time that in principle, electron diffraction at low angles is very sensitive to charge transfer, we, for the first time, show that under a proper TEM imaging condition, it is possible to directly image charge in crystals with a large unit cell. We apply this new way of studying charge distribution to the technologically important Bi2Sr2Ca1Cu2O8+δ superconductors.Charged particles interact with the electrostatic potential, and thus, for small scattering angles, the incident particle sees a nuclei that is screened by the electron cloud. Hence, the scattering amplitude mainly is determined by the net charge of the ion. Comparing with the high Z neutral Bi atom, we note that the scattering amplitude of the hole or an electron is larger at small scattering angles. This is in stark contrast to the displacements which contribute negligibly to the electron diffraction pattern at small angles because of the short g-vectors.

First record of the superfamily Proctotrupoidea from French Polynesia (Hymenoptera)

2020 ◽  
Vol 125 (4) ◽  
pp. 404-406
Author(s):  
Thibault Ramage
Keyword(s):  
First Record ◽  
French Polynesia ◽  
Society Islands ◽  
First Time

A Helorid wasp, Helorus ruficornis Förster, 1856, is reported for the first time on Tahiti (Society Islands), which is also the first record of both Proctotrupoidea and family Heloridae in French Polynesia. The potential hosts of Helorus ruficornis in French Polynesia are discussed.

FIRST RECORD OF MANTIDS (MANTODEA: INSECTA) FROM INDIA

2018 ◽  
Vol 24 (1) ◽  
Author(s):  
SHVETA PATEL ◽  
RAJENDRA SINGH
Keyword(s):  
Uttar Pradesh ◽  
First Record ◽  
Target Area ◽  
Extensive Survey ◽  
First Time

Extensive survey of mantids in the northeastern Uttar Pradesh was conducted. Two mantid species were recorded for the first time from the target area, viz.: Pyrgomantis pallida, 1917 and Bactromantis mexicana.

First Record of Trichodina magna Van As and Basson, 1989 (Ciliophora: Trichodinidae) from Gills of Blue Tilapia Oreochromis aureus (Steindachner, 1864) in Iraq

2018 ◽  
pp. 59
Author(s):  
Kefah Naser Abdul-Ameer ◽  
Fatima Khalaf Atwan
Keyword(s):  
First Record ◽  
Oreochromis Aureus ◽  
Tigris River ◽  
Blue Tilapia ◽  
First Time

   The Ciliophoran Trichodina magna Van As and Basson, 1989 is recorded for the first time in in Iraq from gills of the blue tilapia Oreochromis aureus (Steindachner, 1864) Iraq from Al-Graiat location on the Tigris River at Baghdad city. The description and measurements of this external parasite as well as its illustrations are given.  

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