Marika Polechová

Marika Polechová
Czech Geological Survey · Collections and Material Documentation dept.

Dr.

About

18
Publications
4,502
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101
Citations
Additional affiliations
January 2008 - present
Czech Geological Survey
Position
  • Deputy of Head of Department
Education
September 2008 - May 2013
Charles University in Prague
Field of study
  • Geology - Palaeontology

Publications

Publications (18)
Article
Full-text available
Early Ordovician bivalves are rare worldwide; thus discovery of any new bivalve fauna of this age presents an exceptional event. A new abundant bivalve fauna from the Fezouata Formation of Morocco includes nine genera; Alococoncha?, Babinka, Cardiolaria?, Coxiconchia, Ekaterodonta, Glyptarca, Cienagomya?, Praenucula?, and Redonia. Modern evaluation...
Article
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Ribeiria apusoides and Ribeiria johni sp. nov. are described from the late Katian of the Prague Basin (Bohemia) as the youngest representatives of the genus Ribeiria. The Ordovician ribeirioids from Bohemia (Perunica) show close affinities to the ribeirioids from Armorica and Iberia. The functional morphology of ribeirioids, mainly the pedal muscle...
Article
Full-text available
The type species of Pseudocyrtodonta, P. ala and other two species P. incola, P. obtusa are known from the Middle and Upper Ordovician of the Prague Basin, Bohemia. Because of the actinodont type of the hinge, Pseudocyrtodonta is excluded from the subclass Protobranchia and is transferred to the Autobranchia, family Cycloconchidae. The family Pseud...
Article
Full-text available
A rich bivalve fauna from the Middle Ordovician (Sarka Formation, early and mid Darriwilian) of Bohemia shows close affinities to Middle Ordovician bivalves from Spain (Iberian Peninsula) and France (Armorican Massif). Twelve species and nine genera (one new) are described: Praenucula applanans (Barrande, 1881), Praenucula bohemica (Barrande, 1881)...
Article
Full-text available
Twelve species (four new) and 9 genera of bivalves are described from the uppermost Hirnantian, Upper Ordovician of the Prague Basin, Bohemia: Praenucula dispar (Barrande, 1881), Praenucula abrupta sp. nov., Sluha kosoviensis (Barrande, 1881), Nuculites aff. planulatus Conrad, 1841, Myoplusia contrastans (Barrande, 1881), Myoplusia obtusa (Barrande...
Article
Full-text available
Apresentam-se os primeiros fósseis do Ordovícico de Águeda, provenientes de níveis de meta-argilitos intercalados numa sequência arenítica metamórfica de Arrancada do Vouga. A associação, moderadamente diversa, inclui trilobites [Crozonaspis cf. incerta (Deslongchamps) e Crozonaspis sp.], bivalves [Praenucula sp., Cardiolaria cf. beirensis (Sharpe)...
Article
Full-text available
About 100 – 150 m thick intercalation of dark micaceous siltstone to black clayey shale can be distinguished in the middle part of the Letná Formation (Upper Ordovician, lower Sandbian) at several localities in the NW and NE parts of the Prague Basin. Sandstone and greywacke, dominant elsewhere in this formation, form only a subordinate part of the...
Article
The bivalve fauna from the Sandbian Letná Formation of the Prague Basin includes ten species: Praenucula bohemica, Myoplusia cf. incisa, Synek sp., Pseudarca? incola, Cuneamya catilloides, Modiolopsis draboviensis, Macrodesma flexa, Ectenocardiomorpha veterana, Whiteavesia antiquior, and Myodakryotus patricia. Modiolopsis, often used as a “cumulati...
Article
Full-text available
The bivalve species Cuneamya catilloides from the Late Ordovician of Bohemia, previously assigned to the genus Grammysia , is revised. Cuneamya catilloides is an important element of the Modiolopsis Community Group in the Letná Formation. The genus Grammysia very probably does not occur in the Ordovician of Bohemia and is restricted to the Silurian...
Article
More than 30 species of tergomyan, gastropod, bivalve and cephalopod molluscs are described from the Late Ordovician of central and eastern Anti-Atlas, Morocco. For the cephalopods this represents the first systematically known taxa of the region. Tergomyans and gastropods are most common in the more shaly part of the Lower Ktaoua Formation, while...
Article
Full-text available
In the Central Anti-Atlas (Morocco), the lower part of the Fezouata Shale has yielded locally abundant remains of soft-bodied to lightly sclerotized taxa, occurring in low diversity assemblages characterized by strong spatial and taxonomic heterogeneities, and frequently, by the occurrence of small-sized individuals. Size frequency analyses of Celd...
Article
Full-text available
A complete list of fossils originating from the Cambrian of the Barrandian area and housed in the Musee d'Histoire Naturelle de Lille is compiled. The collection includes two agnostids, ten trilobites, one brachiopod and one echinoderm species, all collected at ten outcrops in the Buchava Formation of the Skryje-Tyrovice Basin and most probably als...
Article
Full-text available
Exceptionally preserved fossils showing typical characters of the so called Konservat-Lagerstätten are shortly mentioned from Cambrian and Ordovician sediments of the Barrandian area. Fossils with well preserved sof parts were ascertained in several diffrent levels of two Cambrian units of the Příbram-Jince Basin as well as in diverse levels of the...
Book
Full-text available
The catalogue you have at disposal fills the perceptible gap in the published doccumentation to the palaeontological collections of the Czech Geological Survey. So far, only poorly known (because of very limited edition) four-volume catalogue of Havlíček et al. (1968), Galle (1968), Galle and Šnajdr (1973) and Šnajdr (1974) have been published abou...
Article
Full-text available
Nuculoids constitute a group of bivalves with simple shell, taxodont teeth, protobranch gills and enlarged foot. They are evolutionary and phylogenetically very important because they represent one of root lineages of the bivalve evolution. This paper presents the revision of nuculids from the Šárka Formation (Darriwilian, Middle Ordovician) includ...

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Project (1)
Project
Upper Ordovician Letna and Liben formations provide weakly mineralised non-trilobite arthropods, and represent a unique insight into the poorly known part of Lower Palaezoic life. Diverse and well-preserved trilobites (some of them with preserved digestive structures) occur together with echinoderms, brachiopods, and unstudied bivalves. Several levels show exceptional preservation of soft tissue and represent Konservat-Lagerstätten; other recently discovered layers are characterized by massive occurrence of articulated invertebrates and represent a case of Konzentrat-Lagerstätten.