scholarly journals First record of an erymid lobster (Crustacea, Decapoda) from the upper Bajocian of Northwest Bulgaria

2021 ◽  
Vol 50 (2) ◽  
pp. 69-74
Author(s):  
Lubomir Metodiev ◽  
Docho Dochev ◽  
Svetlozar Seferinov ◽  
Silviya Petrova
Keyword(s):  
Eastern Europe ◽  
Middle Jurassic ◽  
First Record ◽  
Upper Bajocian ◽  
Single Locality

Fossil chela of an erymid lobster from a single locality of the upper Bajocian in the Western Fore-Balkan Mts (NW Bulgaria) was studied. Two segments of the thoracic appendages, probably belonging to one individual, were described: 1) P1 propodus with partially preserved pollex and dactylus; and 2) P1 carpus and P1 merus attached. These elements of the first pair of pereiopods of a lobster were identified as Eryma compressum (Eudes-Deslongchamps, 1842). Eryma compressum a is well-known taxon from numerous Jurassic localities in Europe but has not been recorded in Bulgaria to date. Therefore, albeit being an isolated finding with only a few elements, the Bulgarian example contributes to the overall record of European erymid faunas from the Middle Jurassic, and especially in Eastern Europe, from where only a few erymids have been reported.

Les olistholites du Riou d'Entraix et leur signification paleostructurale

1966 ◽  
Vol S7-VIII (3) ◽  
pp. 401-404
Author(s):  
Philippe Artru
Keyword(s):  
Middle Jurassic ◽  
Deep Basin ◽  
Upper Bajocian

Abstract The upper Bajocian (middle Jurassic) heterogeneous polygene breccias of the Riou d'Entraix (southeast France) are interpreted as olistostromes formed by gravity sliding along a paleoscarp. The scarp was to the east, in the area presently covered by overthrusts, and separated a euxinic deep basin from a well-oxygenated shallow shelf. Similar deposits in the Barcelonette window and the semi-window at Embrun are probably of the same origin.

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.

First record of Eretmophyllum (Ginkgoales) with well-preserved cuticle from the Middle Jurassic of the Ordos Basin, Inner Mongolia, China

Palaeoworld ◽  
2018 ◽  
Vol 27 (2) ◽  
pp. 188-201 ◽  
Author(s):  
Yun-Feng Li ◽  
Chun-Lin Sun ◽  
Hongshan Wang ◽  
David L. Dilcher ◽  
Xiao Tan ◽  
...  
Keyword(s):  
Middle Jurassic ◽  
Inner Mongolia ◽  
Ordos Basin ◽  
First Record ◽  
The Ordos Basin

First record ofOphthalmosaurus(Reptilia: Ichthyosauria) from the Tithonian (Upper Jurassic) of Mexico

2010 ◽  
Vol 84 (1) ◽  
pp. 149-155 ◽  
Author(s):  
Marie-Céline Buchy
Keyword(s):  
Middle Jurassic ◽  
Late Jurassic ◽  
Field Work ◽  
First Record ◽  
Upper Jurassic ◽  
Marine Transgression ◽  
North East ◽  
The Pacific ◽  
Invertebrate Assemblages ◽  
Marine Reptile

From the Middle Jurassic on, the Tethys basin opened westward; the existence of a Carribean corridor linking the European and Pacific realms now appears well supported by comparison of marine reptile assemblages (e.g., Gasparini and Fernández, 1997, 2005; Gasparini et al., 2000; Fernández and Iturralde-Vinent, 2000; Gasparini and Iturralde-Vinent, 2001, 2006; Gasparini et al., 2002). Marine transgression in Mexico began during the Callovian, as evidenced by the evaporites of the Minas Viejas Fm. However, microfossils and invertebrate assemblages indicate that the Mexican Gulf remained isolated from both the European Archipelago and the Pacific, at least temporarily, until the middle Berriasian; the Florida uplift and southward movement of Yucatan were proposed as possibly forming a barrier (Salvador et al., 1993; Adatte et al., 1994, 1996; Goldhammer, 1999; Goldhammer and Johnston, 2001; Gasparini and Iturralde-Vinent, 2006). After almost a decade of field work and examination of collections, the Late Jurassic marine reptile assemblage of north-east Mexico confirms the conclusions drawn from microfossils and invertebrates. Poorly diagnostic ichthyosaur remains, with various thalattosuchians, numerically dominate the assemblage. Sauropterygians are rare, mainly represented by large pliosaurids of unclear affinities, a few vertebrae attributed to elasmosaurids, and a unique cryptoclidid. Turtles are yet to be reported (Frey et al., 2002; Buchy et al., 2003, 2005b, 2006a–d; Buchy, 2007, 2008a, b; material currently under study).

The first record ofAnomoepustracks from the Middle Jurassic of Henan Province, Central China

2016 ◽  
Vol 29 (2) ◽  
pp. 223-229 ◽  
Author(s):  
Lida Xing ◽  
Nasrollah Abbassi ◽  
Martin G. Lockley ◽  
Hendrik Klein ◽  
Songhai Jia ◽  
...  
Keyword(s):  
Middle Jurassic ◽  
First Record ◽  
Henan Province ◽  
Central China

scholarly journals Ladislavella occulta (Jackiewicz, 1959) – a species of aquatic snails new for Hungary with remarks on its distribution in Central and Eastern Europe

2020 ◽  
Vol 66 (4) ◽  
Author(s):  
Maxim V. Vinarski
Keyword(s):  
Eastern Europe ◽  
Central Europe ◽  
Current Distribution ◽  
Central And Eastern Europe ◽  
Nature Reserve ◽  
First Record ◽  
Marsh Area ◽  
Relic Species

A finding of the lymnaeid species Ladislavella occulta (Jackiewicz, 1959) [Mollusca: Gastropoda: Lymnaeidae] in Hungary is reported, which is the first record of this snail in the country. The shells of L. occulta were found in 1989 in the marsh area of the Bátorliget Nature Reserve. The current distribution of this species in Eastern and Central Europe is reviewed. It is hypothesized that L. occulta represents a relic species, whose origin may be traced back to the Pleistocene

scholarly journals Shallow marine syn-rift sedimentation: Middle Jurassic Pelion Formation, Jameson Land, East Greenland

2003 ◽  
Vol 1 ◽  
pp. 813-863 ◽  
Author(s):  
Michael Engkilde ◽  
Finn Surlyk
Keyword(s):  
Sea Level ◽  
Middle Jurassic ◽  
Large Scale ◽  
Significant Shift ◽  
Shallow Marine ◽  
East Greenland ◽  
Upper Bajocian ◽  
Stacking Pattern ◽  
Facies Associations ◽  
Middle Callovian

The Middle Jurassic Pelion Formation – Fossilbjerget Formation couplet of Jameson Land, East Greenland, is a well-exposed example of the Middle Jurassic inshore–offshore successions characteristic of the rifted seaways in the Northwest European – North Atlantic region. Early Jurassic deposition took place under relatively quiet tectonic conditions following Late Permian – earliest Triassic and Early Triassic rift phases and the Lower Jurassic stratal package shows an overall layer-cake geometry. A long-term extensional phase was initiated in Middle Jurassic (Late Bajocian) time, culminated in the Late Jurassic (Kimmeridgian–Volgian), and petered out in the earliest Cretaceous (Valanginian). The Upper Bajocian – Middle Callovian early-rift succession comprises shallow marine sandstones of the Pelion Formation and correlative offshore siltstones of the Fossilbjerget Formation. Deposition was initiated by southwards progradation of shallow marine sands of the Pelion Formation in the Late Bajocian followed by major backstepping in Bathonian–Callovian times and drowning of the sandy depositional system in the Middle–Late Callovian. Six facies associations are recognised in the Pelion–Fossilbjerget couplet, representing estuarine, shoreface, offshore transition zone and offshore environments. The north–southtrending axis of the Jameson Land Basin had a low inclination, and deposition was sensitive to even small changes in relative sea level which caused the shorelines to advance or retreat over tens to several hundreds of kilometres. Eight composite sequences, termed P1–P8, are recognised and are subdivided into a total of 28 depositional sequences. The duration of the two orders of sequences was about 1–2 Ma and 360,000 years, respectively. The Upper Bajocian P1–2 sequences include the most basinally positioned shallow marine sandstones, deposited during major sealevel lowstands. The lowstands were terminated by significant marine flooding events, during which sandstone deposition was restricted to northern, more proximal parts of the basin. The Upper Bajocian – Middle Bathonian P3–4 sequences show an overall progradational stacking pattern. The sequence boundary at the top of P4 marks a significant shift in stacking pattern, and the Upper Bathonian – Middle Callovian P5–8 sequences show large-scale backstepping, terminating in a widespread condensed succession at the distal, southern end of the basin. The largescale backstepping was governed by combined tectonically-induced subsidence, reflecting increased rates of extension, and eustatic sea-level rise. The depositional trends of the Pelion Formation – Fossilbjerget Formation couplet provide a well-exposed analogue to contemporaneous subsurface deposits which form major hydrocarbon reservoirs on the west Norway shelf, and in the Northern North Sea.

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