This study presents a synthesis of currently available data on the distribution of Cenomanian-age palaeodrainage systems in the Bohemian Cretaceous Basin, filled by fluvial and estuarine strata, and an interpretation of their relationships to the basement units and fault systems. Much of the progress, compared to previous studies, was made possible by a recent basin-scale evaluation of Cenomanian genetic sequence stratigraphy. Several local palaeodrainage systems developed in the basin, separated by drainage divides of local importance and one major divide – the Holice-Nové Mìsto Palaeohigh – which separated the drainage basins of the Tethyan and Boreal palaeogeographic realms. The locations and directions of palaeovalleys were strongly controlled by the positions of inherited Variscan basement fault zones, whereas the bedrock lithology had the subordinate effect of narrowing or broadening valleys on more vs. less resistant substratum, respectively. The intrabasinal part of the palaeodrainage network followed the slopes toward the Labe (Elbe) System faults and was strongly dominated by the conjugate, NNE-trending, Jizera System faults and fractures. Outlet streams – ultimate trunk streams that drained the basin area – are interpreted to have followed the Lužice Fault Zone toward the Boreal province to the Northwest, and the Železné hory Fault Zone toward the Tethyan province to the Southeast. At both the northwestern and southeastern ends of the Bohemian Cretaceous Basin, shallow-marine or estuarine conditions are proven to have existed during the early Cenomanian. Direct evidence for syn-depositional subsidence during the early to mid-Cenomanian, fluvial to estuarine phase is very rare, and the onset of deposition by fluvial backfilling of the palaeodrainage systems was driven mainly by the long-term rise in global sea level. Subtle surface warping, mostly without detectable discrete faulting, is inferred to have been a response to the onset of the palaeostress regime that later, with further stress accumulation, led to subsidence in fault-bounded depocentres of the Bohemian Cretaceous Basin and uplift of new source areas. • Key words: palaeodrainage, Cenomanian unconformity, Bohemian Massif, Elbe Zone, sequence stratigraphy.

ULIÈNÝ, D., ŠPIÈÁKOVÁ, L., GRYGAR, R., SVOBODOVÁ, M., ÈECH, S. & LAURIN, J. 2009. Palaeodrainage systems at the basal unconformity of the Bohemian Cretaceous Basin: roles of inherited fault systems and basement lithology during the onset of basin filling. Bulletin of Geosciences 84(4), 577–610 (15 figures). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received February 27, 2009; accepted in revised form July 7, 2009; published online October 5, 2009; issued December 31, 2009.

David Ulièný, Institute of Geophysics, Academy of Sciences of the Czech Republic, v. v. i., Boèní II/1401, 141 31 Praha 4, Czech Republic; ulicny@ig.cas.cz

Two Middle Miocene forms of Plesiodimylus are described from the Devínska Nová Ves-Fissures site (the Middle Badenian, MN 6). Whereas the smaller form represents the typical individuals of P. chantrei, the larger one represents a different new species (P. similis sp. nov.) with an affinity to P. crassidens from the Anatolian Middle Miocene (MN 7/8).
Aphylogenetic relationship to P. johanni from the Swiss Late Miocene or to the finds of large m2s from the Polish site of Be³chatow A (Plesiodimylus sp., MN 9) is also not excluded. The process of parallelism, caused by both climatic and ecological factors, could play an important role too. The taphonomic origin of both found taxa of Plesiodimylus within
the taphocoenosis of the Devínska Nová Ves-Fissures site is also considered. • Key words: Plesiodimylus, Middle Miocene, Badenian (MN 6), Devínska Nová Ves-Fissures, Slovakia.

FEJFAR, O. & SABOL, M. 2009. Middle Miocene Plesiodimylus from the Devínska Nová Ves-Fissures site (western Slovakia). Bulletin of Geosciences 84(4), 611–624 (6 figures, 3 tables). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received May 12, 2009; accepted in revised form August 11, 2009; published online October 26, 2009; issued December 31, 2009.

Oldøich Fejfar, Department of Palaeontology, Faculty of Science, Charles University, Albertov 6, CZ-12843 Praha 2, Czech Republic; fejfar@natur.cuni.cz • Martin Sabol, Department of Geology and Palaeontology, Faculty of Science, Comenius University, Mlynská dolina, SK-84215 Bratislava, Slovak Republic; sabol@fns.uniba.sk

Aaveqaspis inesoni gen. et sp. nov., is described from the lower Cambrian Sirius Passet Fossil-Lagerstätte of Peary Land, North Greenland. It has a semicircular head shield and a thorax with 5 tergites. The tail shield carries 2 pairs of spines, the most anterior of which is enormous and dominates the trunk. A. inesoni lacks any preserved trace of eyes, as is also the case with several other Sirius Passet arthropods, suggesting that the fossils accumulated in deeper water than the contemporaneous Chengjiang Fossil-Lagerstätte of China or the middle Cambrian Burgess Shale assemblages of British Columbia. • Key words: Cambrian, arthropod, Sirius Passet, Lagerstätte, Greenland.

PEEL, J.S. & STEIN, M. 2009. A new arthropod from the lower Cambrian Sirius Passet Fossil-Lagerstätte of North Greenland. Bulletin of Geosciences 84(4), 625–630 (3 figures). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received July 30, 2009; accepted in revised form September 22, 2009; published online October 9, 2009; issued December 31, 2009.

John S. Peel, Department of Earth Sciences (Palaeobiology), Uppsala University, Villavägen 16, SE-75 236 Uppsala, Sweden; John.Peel@pal.uu.se • Martin Stein, Museum of Evolution, Uppsala University, Norbyvägen 16, SE-752 36 Uppsala, Sweden; Martin.Stein@evolmuseum.uu.se

This study provides the first record and description of the hydroid Protulophila gestroi Rovereto, 1901 from the Bohemian Cretaceous Basin (Czech Republic). The hydroid colony was bioclaustrated by a serpulid tube on the underside of a platy sponge, which is also encrusted by three species of bryozoans and an oyster. The Bohemian specimen differs from
previously described specimens of P. gestroi in having zooidal orifices with broad sinuses. • Key words: Hydrozoa, Protulophila, Turonian, Bohemia.

ZÁGORŠEK, K., TAYLOR, P.D. & VODRÁŽKA, R. 2009. Coexistence of symbiotic hydroids (Protulophila) on serpulids and bryozoans in a cryptic habitat at Chrtníky (lower Turonian, Czech Republic). Bulletin of Geosciences 84(4), 631–636 (5 figures). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received May 7, 2008; accepted in revised form September 9, 2008; published online October 29, 2008; issued December 31, 2009.

Kamil Zágoršek, National Museum, Department of Palaeontology, Václavské námìstí 68, CZ-115 74 Praha; kamil.zagorsek@nm.cz • Paul D. Taylor, Natural History Museum, Department of Palaeontology, London SW7 5BD, United Kingdom; pdt@nhm.ac.uk • Radek Vodrážka, Czech Geological Survey, Klárov 13/3, CZ-118 21 Praha, and Charles University, Faculty of Science, Institute of Geology and Paleontology, Albertov 6, 128 43 Praha 2; Radek.Vodrazka@seznam.cz

The whole territory of Bohemia and Moravia with only two exceptions was located in the periglacial region during the Quaternary glacial periods. These exceptions were the northernmost part of Bohemia and the mouth of the Moravian Gate through which the continental glacier in the past penetrated this country and left traces in the form of moraines and in Moravia also sediments in the oldest Czech lake, Stonava. On the basis of pollen analysis, the organic sediments recovered there were dated to the Holsteinian Interglacial (Mindel/Riss). Natural lakes are rare in the Czech Republic (Èerné, Èertovo, Prášilské, Plešné, Laka, Stonava, Komoøany, Chrást, Stará Boleslav, Polabské èernavy, Soos, Mìòany, Švarcenberk, and Velanská cesta), since most of its territory has never been glaciated. As indicated by new palynological research, this statement does not fully apply to southern Moravia, where a number of lakes existed in the past, e.g. the former lakes Vracov, Èejèské, Kobylské, Vacenovice and Vlkoš. The deposition of lake sediments occurred mainly in the Holocene. According to the present research on the Èejèské Lake, the vegetation assemblages consist of species with various ecological requirements. Due to favorable circumstances, this site has been put forward for protection and designated a Natural Monument. • Key words: palynology, palaeoalgology, biostratigraphy, lakes, palaeoclimatology, palaeoenvironment, Quaternary, Late Glacial, Holocene, S. Moravia, Czech Republic.

BØÍZOVÁ, E. 2009. Quaternary environmental history of the Èejèské Lake (S. Moravia, Czech Republic). Bulletin of Geosciences 84(4), 637–652 (8 figures, 1 table). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received April 27, 2009; accepted in revised form July 27, 2009; published online November 10, 2009; issued December 31, 2009.

Eva Bøízová, Czech Geological Survey, Klárov 3/131, 118 21 Prague 1, Czech Republic; eva.brizova@geology.cz

Spirorbid-like worm tubes, identified as microconchids (Tentaculita) on the basis of morphological and microstructural features, were common and occupied a wide array of environments during the Palaeozoic and Triassic. In the Jurassic, however, microconchids were very rare, represented by only one genus, Punctaconchus Vinn & Taylor, 2007, and confined to normal marine settings. In the present paper, the microconchid Punctaconchus ampliporus Vinn & Taylor, 2007, characterised by large punctae penetrating the exterior of the tubes, is described from the Middle Jurassic of the Polish Jura for the first time. Individuals were found encrusting Lower Bathonian oncoliths. Their low abundance and
diversity on the oncoliths may reflect poor competitive ability for substrate space leading up to the final extinction of the group in the late Bathonian. • Key words: Microconchida, spirorbids, Jurassic, oncoliths, Poland.

ZATOÑ, M. & TAYLOR, P.D. 2009. Microconchids (Tentaculita) from the Middle Jurassic of Poland. Bulletin of Geosciences 84(4), 653–660 (3 figures). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received October 30, 2009; accepted in revised form November 10, 2009; published online December 18, 2009; issued December
31, 2009.

Micha³ Zatoñ (corresponding author), University of Silesia, Faculty of Earth Sciences, Bêdziñska 60, 41-200 Sosnowiec, Poland; mzaton@wnoz.us.edu.pl • Paul D. Taylor, Natural History Museum, Department of Palaeontology, Cromwell Road, London SW7 5BD, United Kingdom; p.taylor@nhm.ac.uk

A new species Lepidostrobus dawsonii sp. nov., from Langsettian-Duckmantian strata at Joggins section, Nova Scotia, Canada is proposed based on palaeobotanical and palynological study. The new species represents gently tapering, narrow and nearly cylindrical cone fragments the base and apical parts of which are missing. In situ spores are trilete, cingulizonate and of the Lycospora uber-type. This is the first description of a lycopsid fructifications and its in situ spores from the Canadian Carboniferous. Morphology of the cones and spores resembles those of the Czech species Lepidostrobus thomasii Bek & Opluštil from the Intra-Sudetic Basin, which is of the same age but represents a less robust
and more cylindrical cone. • Key words: Lycopsids, in situ spores, Lepidostrobus, Lycospora, Pennsylvanian.

THOMAS, B.A., BEK, J. & OPLUŠTIL, S. 2009. A new species of Lepidostrobus from the Early Westphalian of South Joggins, Nova Scotia, Canada. Bulletin of Geosciences 84(4), 661–666 (3 figures, 1 table). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received April 2, 2009; accepted in revised form September 15, 2009; published online November 11, 2009; issued December 31, 2009.

Barry A. Thomas, Aberystwyth University, Aberystwyth, Ceredigion, SY23 3AL, UK; bat@aber.ac.uk • Jiøí Bek, Institute of Geology v.v.i., Academy of Sciences, Rozvojová 269, 165 00 Prague 6, Czech Republic; mrbean@gli.cas.cz • Stanislav Opluštil, Faculty of Sciences, Charles University, Albertov 6, 128 43 Prague 1, Czech Republic; oplustil@natur.cuni.cz

Lower-Middle Devonian conodonts (serotinus-kockelianus zones) from the Tøebotov Limestone (Daleje-Tøebotov Formation) and Choteè Limestone (Choteè Formation) were studied. The following sections in the Prague Basin were sampled in an attempt to refine the conodont biostratigraphy of this sequence: Barrandov road cut, Prastav quarry at Holynì, Jelínek mill quarry at Chýnice and Èervený quarry near Suchomasty. Another aim was to collect new data from sections which have not been sampled before: Na Škrábku quarry at Choteè, U Nìmcù section at Karlštejn and Na vyhlídce section at Hostím. The main focus was on clarifying ranges of individual conodont taxa and thus enabling more precise correlations to be made. Among the most important findings is the lower occurrence of Polygnathus costatus partitus Klapper, Ziegler & Mashkova (the defining species for the Lower-Middle Devonian boundary), recorded in its regional reference section (Prastav quarry) but 2.2 m below the previous boundary. The correlation between the onset of the Basal Choteè event, as well as the occurrence of Polygnathus sp. aff. Polygnathus trigonicus, with the base of the costatus Zone is supported by the results of this study. • Key words: Lower-Middle Devonian, conodont biostratigraphy, Prague Basin.

BERKYOVÁ, S. 2009. Lower-Middle Devonian (upper Emsian-Eifelian, serotinus-kockelianus zones) conodont faunas from the Prague Basin, the Czech Republic. Bulletin of Geosciences 84(4), 667–686 (10 figures). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received June 10, 2009; accepted in revised form November 20, 2009, published online December 18, 2009; issued December 31, 2009.

Stanislava Berkyová, Czech Geological Survey, P.O.B. 85, 118 21 Prague 1;  berkyova.s@seznam.cz

The upper Katian (Upper Ordovician) bryozoans from the Iberian Chains (NE Spain) are described. Twenty-three species are identified, five of them are new, seven were already identified in other paleocontinents and Mediterranean localities, four are provisionally referred to other known species, and seven are undetermined species. All of them belong to 22 genera assigned to 14 families, and to one incertae sedis genera. The five Stenolaemata orders (Cryptostomata, Cyclostomata, Cystoporata, Fenestrata and Trepostomata) are represented here, Trepostomata and Cryptostomata being the most abundant and diverse. The trepostome family Halloporidae is the one with the highest diversity, with 4 genera
and 5 species described here. The five new species are the cryptostomes Pseudostictoporella iberiensis sp. nov., characterized by the presence of superior hemisepta in the autozooecia, and Prophyllodictya javieri sp. nov., also characterized by the presence of superior hemisepta in the autozooecia and by its small exilazooecia; the cystoporate Ceramoporella inclinata sp. nov., whose main diagnostic character is the constant autozooecial inclination; and the trepostomates Dybowskites ernsti sp. nov., easily recognizable by its large autozooecial and mesozooecial apertures, as well as by its large acanthostyles and Trematopora acanthostylita sp. nov., mainly characterized by the absence of diaphragms in its mesozooecia and numerous, large acanthostyles. • Key words: Stenolaemata, Bryozoans, upper Katian, Upper Ordovician, Iberian Chains, NE Spain.

JIMÉNEZ-SÁNCHEZ, A. 2009. The upper Katian (Ordovician) bryozoans from the Eastern Iberian Chain (NE Spain). Bulletin of Geosciences 84(4), 687–738 (45 figures, 24 tables). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received July 3, 2009; accepted in revised form October 27, 2009; published online December 18, 2009; issued December 31, 2009.

Andrea Jiménez-Sánchez, Área de Paleontología, Departamento de Ciencias de la Tierra, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza (Spain); andreaj@unizar.es

The presence of bollandiine trilobites is reported for the first time in the early Carboniferous of Moravia, the Czech Republic. Bollandia persephone (Hahn & Hahn, 1970) and B. cf. megaira (Hahn & Hahn, 1970) were recovered from pelitic shales of late Tournaisian age within the Bøezina Formation exposed in Mokrá quarry, near Brno. Along with other taxa, these two species constitute a trilobite assemblage with few affinities to other Carboniferous associations known from the Czech Republic, but resemble an assemblage from the late Tournaisian of the Harz Mountains. Morphological characters of Bollandia species are interpreted as being indicative of an epibenthic mode of life, with possible adaptations
for digging and for predatory/scavenging feeding habits. • Key words: Trilobita, Phillipsiidae, Bollandia, Carboniferous, palaeoecology, Moravian Karst.

RAK, Š. & LEROSEY-AUBRIL, R. 2009. First record of the Carboniferous trilobite Bollandia from the Moravian Karst (Czech Republic) and its significance. Bulletin of Geosciences 84(4), 739–744 (3 figures). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received July 16, 2009; accepted in revised form October 1, 2009; published online December 18, 2009; issued December 31, 2009.

Štìpán Rak (corresponding author), Charles University, Institute of Geology and Palaeontology, Albertov 6, 128 43 Prague 2, Czech Republic; deiphon@geologist.com • Rudy Lerosey-Aubril, Forschungsinstitut Senckenberg, Section Palaeozoology I, Senckenberganlage 25, D-60325 Frankfurt am Main,Germany; Rudy.Lerosey-Aubril@seckenberg.de

An analysis of the crystallographic texture of nacre (mother-of-pearl) in the Late Triassic gastropod Wortheniella coralliophila is presented. The primary aim of this study was to test the time stability of the crystallographic texture pattern of gastropod nacre over an extremely long time span. Our results show that the crystallographic axes of individual aragonite platelets in the Late Triassic Wortheniella coralliophila have an identical arrangement to those in living vetigastropods. The same microstructure as well as the crystallographic texture of nacre in Recent and Late Triassic gastropods implies the same biological mechanisms for its formation. Our study suggests that the proteins controlling the shape and orientation of individual nacreous platelets in living gastropods have not changed since the Late Triassic. The molecular mechanisms driving the origin and the development of gastropod nacre are thus extremely old and have remained unchanged for at least 220 million years. • Key words: Gastropoda, nacre, crystallographic texture, time stability.

FRÝDA, J., BANDEL, K. & FRÝDOVÁ, B. 2009. Crystallographic texture of Late Triassic gastropod nacre: evidence of long-term stability of the mechanism controlling its formation. Bulletin of Geosciences 84(4), 745–754 (4 figures, 1 table). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received October 30, 2009; accepted in revised form December 9, 2009; published online December 18, 2009; issued December 31, 2009.

Jiøí Frýda, Czech Geological Survey, P.O.B. 85, 118 21 Prague 1, and Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6 – Suchdol, 165 21, Czech Republic; bellerophon@seznam.cz • Klaus Bandel, Universität Hamburg, Geologisch Paläontologisches Institut und Museum, Bundesstrasse 55, 20146 Hamburg, Germany; klausbandel@yahoo.com • Barbora Frýdová, VÚRV v.v.i., Research Institute, Drnovská 507, 161 06 Prague – Ruzynì, Czech Republic

A new genus Euryrizocerina (Nautiloidea, Oncocerida, Oonoceratidae) from the late Silurian strata of Bohemia (Prague Basin) is established. Two species are included within the genus: the type species E. normata (Barrande, 1877) and E. pulchra sp. nov. The genus is striking for two features – the preservation of shell colouration and muscle attachment scars in the type species. These features are reliable for taxonomic and palaeoecological analysis of nautiloids, but due to their only occasional preservation in fossils, the evolutionary trends of these characters remain poorly understood. The colour pattern of Euryrizocerina consists of irregular pulsed transverse bands that clearly differ from the colour patterns known in other oncocerids where rather regular wave-like or zig-zag bands have been observed. It is questionable whether the new type of colouration represents a taxonomic or morphotypic feature, as Euryrizocerina is the first oncocerid to be recognised with a highly curved shell that retains colouration. Oncocerids exhibit multiple paired muscle scars and there is uncertainty whether these represent an original metamery, inherited from a cephalopod ancestor, or a derived feature. Euryrizocerina possesses four pairs of retractor muscle scars, but its ancestor “Oonoceras” fraternum and allied forms, possess multiple pairs of muscle scars around the base of the body-chamber, as do the majority of oncocerids. A similar reduction in the number of muscle scar pairs has been documented in Devonian rutoceratoids. The high evolutionary plasticity of muscle attachments patterns, as indicated by these examples, suggests that the muscle complex and its attachment to the shell was under adaptive control and is more likely to reflect the form of the shell and the mode of life of the organism. It seems likely that shell colouration and the pattern of attachment of the retractor muscles have a much more complex evolutionary history (including several convergences) than was previously supposed. • Key words: Nautiloidea, Oncocerida, colour pattern, muscle scars, Silurian, Prague Basin, new taxa.

MANDA, Š. & TUREK, V. 2009. A Silurian oncocerid with preserved colour pattern and muscle scars (Nautiloidea). Bulletin of Geosciences 84(4), 755–766 (7 figures). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received October 30, 2009; accepted in revised form December 22, 2009; published online December 30, 2009; issued
December 31, 2009.

Štìpán Manda, Czech Geological Survey, P.O.B. 85, Praha 011, 118 21, Czech Republic; stepan.manda@geology.cz • Vojtìch Turek, National Museum, Department of Palaeontology, Václavské námìstí 68, 115 79 Praha 1, Czech Republic; vojtech.turek@nm.cz

The bryozoan genus Petaloporella Prantl, 1935 was originally described from the Lower Devonian Braník Limestone (Zlíchovian = Lower Emsian) of Braník, the Czech Republic. It
belongs to the family Hyphasmoporidae Vine, 1885. The type species Petaloporella bohemica Prantl, 1935 was also recorded from the Lower Devonian (Pragian) of Bohemia and Morocco. The present paper provides an emended diagnosis of the genus and a description of new Petaloporella bohemica material from the Konìprusy Limestone of Zlatý Kùò near Konìprusy, the Czech Republic. • Key words: Lower Devonian, Bohemia,
cryptostome Bryozoa, taxonomy.

ERNST, A. 2009. Petaloporella (Cryptostomata, Bryozoa) from the Lower Devonian of central Bohemia. Bulletin of Geosciences 84(4), 767–770 (1 figure, 1 table). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received August 11, 2009; accepted in revised form September 22, 2009; published online December 29, 2009; issued December 31, 2009.

Andrej Ernst, Institut für Geowissenschaften der Christian-Albrechts-Universität zu Kiel, Ludewig-Meyn-Str. 10, D-24118 Kiel, Germany; ae@gpi.uni-kiel.de