A5044625801- Paleontology and Stratigraphy of Fossils
- Marine Biology and Ecology Research
- Geological Formations and Processes Exploration
- Geological formations and processes
- Geology and Paleoclimatology Research
- Paleontology and Evolutionary Biology
- Fossil Insects in Amber
- Coleoptera Taxonomy and Distribution
- Botany and Plant Ecology Studies
- Marine and environmental studies
- Scarabaeidae Beetle Taxonomy and Biogeography
- Plant Diversity and Evolution
- Insect and Arachnid Ecology and Behavior
- Mollusks and Parasites Studies
- Marine Invertebrate Physiology and Ecology
- Geological and Geochemical Analysis
- Marine and coastal plant biology
- Evolution and Paleontology Studies
- Coleoptera: Cerambycidae studies
- Plant and animal studies
- Plant and Fungal Species Descriptions
- Marine Toxins and Detection Methods
- Geological Modeling and Analysis
- Phytoplasmas and Hemiptera pathogens
- Marine Ecology and Invasive Species
National Museum
2002-2024
Charles University
2019-2023
Czech Academy of Sciences, Institute of Geology
2019-2023
Natural History Museum
2023
East Bohemian Museum
2023
Czech Academy of Sciences
2020
Czech Technical University in Prague
2020
Czech Academy of Sciences, Institute of Botany
2020
Abstract The lower Paleozoic succession of central Europe exposed in the Bohemian Massif is a classic area geology with long-standing tradition research dating back to eighteenth century. Ordovician rocks form parts sections several units that sit on Cadomian basement. These sedimentary and volcano-sedimentary fills partial depressions basement are relics system rift basins Gondwanan margin reflecting rifting Rheic Ocean. related subsidence period during extensional regime accompanied by...
Abstract In order to place newly discovered fossil taxa ( Palaeosymbius gen. nov. with P. groehni and mesozoicus spp. nov.) from the mid‐Cretaceous amber northern Myanmar, we investigated relations of extant extinct lineages coccinellid group Coccinelloidea emphasis on family Anamorphidae. We assembled a taxonomic sampling 34 taxa, including 15 genera 19 species Anamorphidae, most comprehensive Anamorphidae at generic level in phylogenetic analysis. A morphological dataset 47 characters was...
Here we report a new species, Cretodorus lijuanae sp. nov., of extinct Mimarachnidae from mid-Cretaceous amber northern Myanmar. C. nov. was described based on one adult and three nymphal fossils. The specimen exhibits the diagnostic features possesses unique number arrangement sensory pits in pronotum: nine side, with five between median pronotal carinae four lateral carina margin, which is consistent nymphs. We also conduct morphometric analyses forewings all known species Cretodorus,...
Water scavenger beetles (Coleoptera: Hydrophilidae) are a broadly distributed group with high extant diversity. However, reliable records from Baltic amber (Eocene) scarce and limited to two undescribed species previously reported in the literature. Here we study these specimens plus four additional ones. All were sub-optimal terms of preservation visibility their morphology using traditional light microscopy. Opaque bubbles, cracks pieces contracted appendages obscured most crucial...
Micro-computed tomography (micro-CT) allows non-invasive imaging of internal structures various objects.Micro-CT devices (x-ray microscope, CT scanner) utilize x-rays to see inside the object and enable its three-dimensional (3D) reconstruction.Here, a large set shells (>60 specimens) varying composition origin were visualized using micro-CT test efficiency for investigation (micro-)borings other colonization structures.The covered materials marine shells, from Ordovician recent, some them...
A review of the supposed moulting positions Bohemian Ordovician dalmanitoid and acastoid trilobites is presented. Five main are described, but some combinations these also widespread. The variability mechanisms surprisingly high, especially in Middle taxa. All and/or almost all may occur together even within a single species. In advanced representatives, only few described prevail. Nevertheless, occurrence considered to be constrained by overall body morphology, rather than result...
ABSTRACT This present revision of Bohemian Ordovician illaenid trilobites the Prague Basin (Czech Republic) follows recent evaluation their systematic position. contains redescriptions and illustrations type species several genera, most up-to-date references for those an assessment variability also palaeobiogeographic distribution some genera. illaenids in cases include globally distributed taxa, whose distinction has often been uncertain controversial. The validity genera Zbirovia Šnajdr,...
The calcareous tubes inhabited by some polychaetes (some Serpulidae and the sabellid Glomerula ) which are adapted to live sticking in soft ground, starting from Permian, represent widespread but widely neglected understudied substrates for domichnial bioerosion. Serpulids can be considered small macrofauna. However, due thinness of serpulid tubes, borings them sized order 0.01–0.9 mm diameter thus rather micropaleontological objects. Extensive methodologically broad search (vacuum castings...
Abstract The basal Cambrian Kuanchuanpu Formation (southern Shaanxi, China) yields well‐preserved specimens of the medusozoan genus Olivooides , a thecate polyp with pentaradial symmetry. Described herein is rare internal thecal (peridermal) structure, termed ‘transverse disc‐shaped diaphragm’ (TDD), which consists thin, adapically convex transverse wall spanning peridermal cavity in certain O . mirabilis and multisulcatus TDD may be diagnostic feature distinguishing from other genera family...
During his short life, Karel Holub, together with father Holub Sr. (a tannery worker), assembled an extensive collection of fossils from the Bohemian Lower and Middle Ordovician. Due to poor living conditions, he was unable study palaeontology instead became a teacher in rural small schools. Despite this, continued activities collaborated leading experts time such as Jaroslav Perner, Celda Klouček others. died shortly after establishment Czechoslovak Republic on 14 November 1918 Světlá pod...
The Cupressaceae conifer Stutzeliastrobus bohemicus (Bayer) J.Kvaček comb. nov. is described from the Cenomanian Peruc-Korycany Formation of Bohemian Cretaceous Basin. It characterised by elongate ovuliferous cones with helically arranged thin, bilaterally symmetrical bract-scale complexes, bearing two to four winged ovoid seeds per complex. Ovuliferous are found attached twigs Cyparissidium-type shoots, showing amphistomatic scale-like leaves an adaxial cuticle, stomatal bands transversely...
The Šárka Formation is a well-known, fossiliferous Ordovician deposit in Bohemia.It has been targeted by fossil collectors since the 19th century due to excellent preservation of many fossils.As result, mainly well-preserved and interesting specimens have deposited collections.Many fragments, typical accumulations but also complete belonging common taxa, ignored because they were considered poorly preserved compared others.That why some palaeoecological taphonomical aspects faunas are...
Abstract Machaeridians are armoured annelids that were morphologically diverse during the Palaeozoic. The scleritome developed from fleshy protrusions at base of each parapodium, with alternating segments giving rise to differentiated inner and outer shell plates. elytra‐like anatomy shell‐bearing soft tissues distinctive jaw apparatus support an affinity machaeridians aphroditacean scaleworms. While frequently found as disarticulated remains, whole scleritomes rare. Only a few species...