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1

On the distribution of water frogs [Rana esculenta Synklepton] in the Czech Republic with some notes from this territory

100%
Zavadil V.
Zoologica Poloniae
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1994
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tom 39
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nr 3-4
2
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Extremely rare Turonian belemnites from the Bohemian Cretaceous Basin and their palaeogeographical importance

80%
Kostak M., Wiese F.
Acta Palaeontologica Polonica
|
2011
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tom 56
|
nr 2
New records of extremely rare late Turonian belemnites are described from the Úpohlavy working quarry in the Bohemian Cretaceous Basin. These specimens are referred to Praeactinocamax bohemicus (Stolley, 1916). An alveolar fragment possibly represents Praeactinocamax strehlensis (Fritsch, 1872) and would be the third find of this species ever recorded. All finds derive from a thin horizon in the uppermost part of the Hudcov limestone (Teplice Formation, uppermost Subprionocyclus neptuni Ammonite Zone). The small faunule most likely had its origin in a taxon from the Praeactinocamax manitobensis/walkeri/sternbergi group of the North American Province, and its occurrence in Europe can be seen in the context of a southward shift of Boreal taxa in the course of a late Turonian cooling event.
3
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Aquatic mollusc fauna of the Ohre River - an important site of Unio crassus Philipsson, 1788 (Bivalvia: Unionidae) in northwestern Bohemia

80%
Beran L.
Folia Malacologica
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2015
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tom 23
|
nr 4
4
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The early angiosperm Pseudoasterophyllites cretaceus from Albian-Cenomanian of Czech Republic and France revisited

80%
Kvacek J., Gomez B., Zetter R.
Acta Palaeontologica Polonica
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2012
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tom 57
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nr 2
The early halophytic angiosperm Pseudoasterophyllites cretaceus from the Cenomanian Peruc Korycany Formation of the Bohemian Cretaceous Basin and from the Late Albian of the Northern Aquitanian Basin is redescribed. The plant is characterized by semi−whorled linear, and heavily cutinized leaves with paracytic stomata. Stamens associated with P. cretaceus possess an apically emerging connective that possesses the same epidermal cell pattern as the leaves. The stamens are massive, tetrasporangiate, and contain Tucanopollis pollen, thus clearly indicating affinities of P. cretaceus to the basal angiosperms. The plants that co−occur with P. cretaceus in semi−autochtonous taphocoenoses include the conifer Frenelopsis alata, which was likely a halophyte or halo−tolerant glycophyte growing in habitats close to the sea.
5
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Colour patterns in Early Devonian cephalopods from the Barrandian Area: Taphonomy and taxonomy

80%
Turek V.
Acta Palaeontologica Polonica
|
2009
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tom 54
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nr 3
491-502
Five cephalopod specimens from the Lower Devonian of Bohemia (Czech Republic) preserve colour patterns. They include two taxonomically undeterminable orthoceratoids and three oncocerid nautiloids assigned to the genus Ptenoceras. The two fragments of orthocone cephalopods from the lowest Devonian strata (Lochkovian, Monograptus uniformis Zone) display colour patterns unusual in orthoceratoids. They have irregular undulating and zigzag strips that are preserved on counterparts of adapertural regions of specimens flattened in shale, despite their original aragonitic shell having been completely dissolved. These are probably the result of the proteinous pigment inside the shell wall, being substituted during diagenesis by secondary minerals leaving only an altered trace of the original shell. Orthoceratoids from sediments unsuitable for preservation of this feature discussed here thus demonstrate an exceptional case of preservation of colour patterns, not only within Devonian cephalopods but also within other Devonian molluscs. Three specimens of Ptenoceras that preserve colour patterns come from younger Lower Devonian strata. Oblique spiral adaperturally bifurcating bands are preserved in P. alatum from the Pragian and zigzags in P. nudum from the Dalejan. Juvenile specimen of Ptenoceras? sp. from the Pragian exhibits highly undulating transversal bands—a pattern resembling colour markings in some Silurian oncocerids. Dark grey wavy lines observed on the superficially abraded adapical part of a phragmocone of nautiloid Pseudorutoceras bolli and interpreted formerly to be colour markings are here reinterpreted as secondary pigmented growth lines. Other Devonian fossils including a single brachiopod and several gastropods from the Barrandian Area with preserved colour patterns are mentioned. Variety of cephalopod colour patterns, their taxonomic significance, function and significance for palaeoecological interpretation, palaeoenvironmental conditions favouring colour pattern preservation and systematic affiliation of taxa with colour pattern preserved are discussed.
6

Observations on the transmission and the seasonality of infection of the nematode Cystidicoloides ephemeridarum in Salmo trutta fario in a small trout stream in North Bohemia, the Czech Republic

80%
Moravec F., Frantova D.
Acta Parasitologica
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2003
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tom 48
|
nr 1
Seasonal variations in the occurrence and maturation of the nematode Cystidicoloides ephemeridarum (Linstow, 1872) were followed in brown trout, Salmo trutta fario L., in the Homolský Brook (the Elbe River basin) at Velké Březno, North Bohemia, the Czech Republic, during the period of 14 months (from April 2000 to May 2001). Nymphs of the mayfly Ephemera danica Müller were found to be the main intermediate host; the degree of infection of mayflies was relatively high throughout the year [total prevalence 74%, intensity 1-115 (mean 2) nematode larvae], but showed distinct seasonal changes with maximum values in May and minimum values in June. Other, less important mayfly intermediate hosts in this locality were Habroleptoides modesta (Hagen) and Ecdyonurus dispar (Curtis); the latter represents a new intermediate host record for C. ephemeridarum. The loach, Barbatula barbatula (L.), was found for the first time as the natural paratenic host of this nematode. In this locality, C. ephemeridarum had no distinct generations, but gravid females laid eggs throughout the year; seasonal changes were only quantitative. The main period of oviposition was from May until October (maximum in August). New infections were acquired by trout all the year round, but mainly from September until May of the next year. The parasite’s seasonal maturation cycle was induced by ecological factors, particularly water temperature and seasonal changes in the populations of mayfly intermediate hosts.
7
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Pellets independent of or associated with Bohemian Ordovician body fossils

80%
Bruthansova J., Kraft P.
Acta Palaeontologica Polonica
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2003
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tom 48
|
nr 3
Clusters of small cylindrical pellets occur sporadically in Ordovician strata in Bohemia. They are assigned to the ichnogenus Tomaculum and occur in lenticular or elongated accumulations. Similar accumulations are associated with body fossils including the cephala of the trilobites Ormathops atavus, Pricyclopyge binodosa, and Parabarrandia crassa. The clusters are situated under the glabella and in the anterior parts of the cephalon but their exact position is variable in different cases. Accumulations of pellets have also been studied inside shells of hyoliths, bellerophontids, and echinoderm thecae. They probably represent the faeces of either scavengers feeding on soft parts or organisms using cephalic shields and other shells as hiding places. An interpretation of these pellets as trilobite eggs is highly improbable.
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