scholarly journals Vertebrate Microremains from the Pragian, Emsian and Eifelian of the Prague Basin (Czech Republic)

2017 ◽  
Vol 51 (1-2) ◽  
pp. 1-12
Author(s):  
Michal Mergl ◽  
Valéria Vaškaninová ◽  
Živile Žigaite
Keyword(s):  
Czech Republic ◽  
Middle Devonian ◽  
Prague Basin ◽  
Barrandian Area ◽  
Late Emsian

Abstract The vertebrate faunas in limestone samples of the Early and Middle Devonian ages (Pragian, early Emsian, late Emsian, and latest Eifelian) which were collected from five localities in the Barrandian area, Bohemia, include scales, tesserae, bones, and teeth of acanthodians, placoderms, chondrichthyans, and sarcopterygians. Although the vertebrate remains are not abundant the assemblages are significant in being dominated by particular taxa. Apart from undetermined microremains the genera Cheiracanthoides, Laliacanthus, Nostolepis, and Tassiliodus were determined.

The earliest ostracods from the Ordovician of the Prague Basin, Czech Republic

2014 ◽  
Vol 64 (4) ◽  
pp. 367-392 ◽  
Author(s):  
Karolína Lajblová ◽  
Petr Kraft
Keyword(s):  
Czech Republic ◽  
Bohemian Massif ◽  
Massif Central ◽  
Central European ◽  
Middle Ordovician ◽  
Prague Basin ◽  
Barrandian Area ◽  
Fossil Assemblages ◽  
European Variscides

Abstract The earliest ostracods from the Bohemian Massif (Central European Variscides) have been recorded from the Middle Ordovician of the Prague Basin (Barrandian area), in the upper Klabava Formation, and became an abundant component of fossil assemblages in the overlying Šarka Formation. Both early ostracod associations consist of eight species in total, representing mainly eridostracans, palaeocopids, and binodicopids. The revision, description, or redescription of all species and their distribution in the basin is provided. Their diversification patterns and palaeogeographical relationships to ostracod assemblages from other regions are discussed.

scholarly journals Problematic Sclerites Eurytholia from the Lower and Middle Devonian of the Czech Republic

2019 ◽  
Vol 53 (1) ◽  
pp. 1-11
Author(s):  
Michal Mergl
Keyword(s):  
Czech Republic ◽  
New Species ◽  
Middle Devonian ◽  
Lower Devonian ◽  
Time Range ◽  
Formal Description ◽  
The Czech Republic ◽  
Barrandian Area ◽  
First Time ◽  
A New Species

AbstractProblematic phosphatic sclerites Eurytholia are reported for the first time from the Middle Devonian. Unequivocal sclerites were observed in limestones of Emsian to late Eifelian age in six localities of the Barrandian area of the Central Bohemia of the Czech Republic. Formerly observed size and shape variations of Eurytholia sclerites prevent formal description of a new species on few specimens of Emsian and Eifelian age. Therefore the new specimens are identified as Eurytholia aff. bohemica. Their presence indicates longer time range of the Eurytholia animal, covering not only the Ordovician, the Silurian and the earliest Devonian as known formerly, but also late Lower Devonian and the Middle Devonian. Similar features in morphology and histology of Eurytholia indicate relationship to a conodont Pseudooneotodus and a support suggestion about the vertebrate origin of Eurytholia sclerites.

Environmental changes close to the Lower–Middle Devonian boundary; the Basal Choteč Event in the Prague Basin (Czech Republic)

Facies ◽  
2012 ◽  
Vol 59 (2) ◽  
pp. 425-449 ◽  
Author(s):  
S. Vodrážková ◽  
J. Frýda ◽  
T. J. Suttner ◽  
L. Koptíková ◽  
P. Tonarová
Keyword(s):  
Czech Republic ◽  
Middle Devonian ◽  
Environmental Changes ◽  
Prague Basin

scholarly journals Trilobite assemblage of Calceola-bearing beds in Acanthopyge Limestone (Choteč formation, Middle Devonian, Eifelian, Prague Basin, the Czech Republic)

2019 ◽  
Vol 75 (1) ◽  
pp. 79-91
Author(s):  
Petr Budil ◽  
Michal Mergl
Keyword(s):  
Czech Republic ◽  
Shallow Water ◽  
Middle Devonian ◽  
Precise Determination ◽  
Rare Occurrence ◽  
The Czech Republic ◽  
Prague Basin ◽  
Generic Composition ◽  
High Dynamic

Abstract The trilobite assemblage of Calceola-bearing beds in the upper part of Acanthopyge Limestone (Choteč Formation, Eifelian) in the Koněprusy area, the Czech Republic, is described. Together with occurrence of Calceola, it indicates absence of significant palaeogeographic barriers restricting the distribution of the Rhenish-Type faunas in the Middle Devonian. The generic composition of the gathered trilobite assemblage somewhat differs from typical Acanthopyge-Phaetonellus assemblage characteristic for the Acanthopyge Limestone facies in possible absence and/or very rare occurrence of Phaetonellus, and only infrequent occurrence of Acanthopyge. Phacopid Chotecops cf. hoseri (Hawle et Corda, 1847) distinctly dominates; all other taxa are rather rare. Important is an occurrence of scutelluids of the Scutellum sensu lato group (preservation of remains does not enable more precise determination) and Longiproetus(?). Trilobite remnants are generally poorly preserved and very fragmented (only minute shields are not affected), which support a high-dynamic, shallow-water original environment.

Ontogenetic and intraspecific variation in the late Emsian – Eifelian (Devonian) conodonts Polygnathus serotinus and P. bultyncki in the Prague Basin (Czech Republic) and Nevada (western U.S.)

2013 ◽  
Vol 63 (2) ◽  
pp. 153-174 ◽  
Author(s):  
Gilbert Klapper ◽  
Stanislava Vodrážková
Keyword(s):  
New York ◽  
Czech Republic ◽  
Intraspecific Variation ◽  
Ontogenetic Variation ◽  
Normal Variation ◽  
Important Indicator ◽  
Prague Basin ◽  
Conodont Zonation ◽  
Late Emsian ◽  
Rule Out

Abstract Klapper, G. and Vodražkova, S. 2013. Ontogenetic and intraspecific variation in the late Emsian - Eifelian (Devonian) conodonts Polygnathus serotinus and P. bultyncki in the Prague Basin (Czech Republic) and Nevada (western U.S.). Acta Geologica Polonica, 63 (2), 153-174, Warszawa. Samples from populations of Polygnathus serotinus Telford 1975 and P. bultyncki Weddige 1977 from the Prague Basin and Nevada display normal variation for Devonian conodont species. A considerable number of previous authors, however, have proposed unnecessary synonyms of these two species, primarily because they have not recognized ontogenetic variation. In contrast, we interpret the variation as ontogenetic as well as intraspecific and present detailed synonymies as a result. A third species, P. praetrigonicus Bardashev 1992, which has been carried in open nomenclature for many years, is an important indicator of the basal costatus Zone in the Prague Basin, New York, and Nevada. We review the stratigraphic distribution of these three species and the conodont zonation across the Emsian-Eifelian (Lower-Middle Devonian) boundary. Polygnathus pseudocostatus sp. nov. (partitus-costatus zones, central Nevada) is described herein. We have observed a decrease in the pit size during ontogeny in P. bultyncki although we have not measured enough specimens to rule out intraspecific versus ontogenetic variation.

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