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A mysterious giant ichthyosaur from the lowermost Jurassic of Wales

100%

Martin J. E., Vincent P., Suan G., Sharpe T., Hodges P., Williams M., Howells C., Fischer V.

Acta Palaeontologica Polonica

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2015

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tom 60

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nr 4

Ichthyosaurs rapidly diversified and colonised a wide range of ecological niches during the Early and Middle Triassic period, but experienced a major decline in diversity near the end of the Triassic. Timing and causes of this demise and the subsequent rapid radiation of the diverse, but less disparate, parvipelvian ichthyosaurs are still unknown, notably because of inadequate sampling in strata of latest Triassic age. Here, we describe an exceptionally large radius from Lower Jurassic deposits at Penarth near Cardiff, south Wales (UK) the morphology of which places it within the giant Triassic shastasaurids. A tentative total body size estimate, based on a regression analysis of various complete ichthyosaur skeletons, yields a value of 12-15 m. The specimen is substantially younger than any previously reported last known occurrences of shastasaurids and implies a Lazarus range in the lowermost Jurassic for this ichthyosaur morphotype.

2

Ultrastructure of Candida albicans pleomorphic forms: phase-contrast microscopy, scanning and transmission electron microscopy

86%

Staniszewska M., Bondaryk M., Siennicka K., Kurzatkowski W.

Polish Journal of Microbiology

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2012

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tom 61

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nr 2

A modified method of glutaraldeyde-osmium tetroxide fixation was adjusted to characterize the ultrastructure of Candida albicans pleomorphic forms, using phase-contrast microscopy, scanning electron microscopy and transmission electron microscopy. &e discovered morphological criteria defining the individual morphotypes are discussed in terms of mycological and histopathological diagnostics of candidiasis. &e relations are discussed between fungal pleomorphism, virulence and susceptibility of di!erent morphotypes to fungicides.

3

Changed species composition of naked amoebae in soils of forest-and-steppe zone of Ukraine

86%

Patsyuk M.

Acta Biologica

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2019

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tom 26

4

The spicules of sponges from Lower Cretaceous of the Polish lowlands

86%

Sztejn J.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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1995

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tom 43

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nr 3

5

Physiological factors affecting yield formation in the canopy of traditional and new morphotypes of triticale plant [Triticosecale Wittmarck]

86%

Czerednik A., Nalborczyk E.

Acta Physiologiae Plantarum

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2001

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tom 23

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nr 1

6

Morphological variability of Cardaminopsis halleri [L.] HAYEK populations from areas differing in anthropopressure level

72%

Franiel I., Fialkiewicz B.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 5

677-683

Twelve morphometric variables of Cardaminopsis halleri individuals from four sites in upper silesia province were analyzed to establish the pattern of interpopulational relations. Two hundred plants were collected from two very polluted areas (near zinc-lead and zinc smelters) as well as from two other sites in unpolluted areas within the same bioclimatic region. stem size, dimensions of leaves and rosettes, as well as flower and seed numbers and individual dry weights were studied using standard biometric methods. cluster analysis indicated overall differences among populations. Those four populations are different with respect to all variables. Discriminant function analysis confirmed seed number as the most important variable in the evaluation of interpopulational variability.

7

Low level genetic diversity of opalinid morphotypes from the digestive tract of Hoplobatrachus rugulosus (Batrachia, Amphibia) in Thailand

72%

Gentekaki E., Chantangsi C.

Acta Protozoologica

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2017

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tom 56

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nr 4

8

Chrysophycean stomatocysts associated with the carnivorous plants (genus Utricularia) from Jeleniak-Mikuliny Nature Reserve

72%

Wolowski K., Piatek J., Plachno B. J.

Oceanological and Hydrobiological Studies

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2013

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tom 42

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nr 4

9

New sauropod trackways from the Middle Jurassic of Portugal

72%

Santos V. F., Moratalla J. J., Royo-Torres R.

Acta Palaeontologica Polonica

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2009

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tom 54

|

nr 3

409-422

The Galinha tracksite reveals a sequence of Bajocian–Bathonian limestones belonging to the Serra de Aire Formation (West−Central Portugal) and is one of the few sites in the world where Middle Jurassic sauropod dinosaur tracks can be found. This tracksite is characterised by the presence of long, wide gauge sauropod trackways, the Middle Jurassic age of which suggests these dinosaurs were more widely distributed over time than previously thought. Two trackways contain unique pes and manus prints with morphologies that allow a new sauropod ichnotaxon to be described: Polyonyx gomesi igen. et isp. nov. On the basis of different manus/pes prints and trackway features, the proposal is made to subdivide Sauropodomorpha ichno−morphotypes into five groups: Tetrasauropus−like, Otozoum−like, Breviparopus/Parabrontopodus−like; Brontopodus−like, and Polyonyx−like. Polyonyx gomesi igen. et isp. nov. is thought to represent a nonneosauropod eusauropod, with a well developed manus digit I. The posterior orientation of this digit print suggests they were made by a eusauropod dinosaur with a posteriorly rotated pollex. The manus print morphologies observed in two trackways suggest a stage of manus structure intermediate between the primitive non−tubular sauropod manus and the tubular metacarpal arrangement characteristic of more derived sauropods. The low heteropody (manus:pes area ratio 1:2) of the trackway renders it possible they could have been made by eusauropods such as Turiasaurus riodevensis, which has a similar manus:pes area ratio. The Polyonyx igen. nov. trackway was made by non−neosauropod eusauropod, and suggests that wide gauge sauropod trackways were not exclusively made by Titanosauriformes.

10

The impact of foliar application of biostimulators on the morphological characteristics of the leaf rosette of winter rape plants

72%

Sikorska A., Gugala M., Zarzecka K., Domanski L.

Agronomy Science

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2022

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tom 77

|

nr 2

11

Intraspecific molecular variation of Allium ursinum (Amaryllidaceae) across the border of two subspecies distribution ranges

72%

Rola K., Lenart-Boron A., Boron P., Osyczka P.

Acta Biologica Cracoviensia. Series Botanica

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2015

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tom 57

|

nr 1

The study investigates the genetic differentiation among two subspecies of Allium ursinum L., namely A. ursinum subsp. ursinum and subsp. ucrainicum as well as their putative hybrid that is represented by individuals with intermediate morphology. Inter-Simple Sequence Repeats (ISSR) were applied to determine the status of intermediate morphotypes in terms of their genetic pattern and to assess the level of genetic variability within and between various populations of A. ursinum. The study comprises 144 specimens from nine populations along the east-west transect in Poland, which includes localities of both subspecies and their putative hybrid. Among the examined populations, 48 bands were amplified, of which 45 were found to be polymorphic. The principal coordinate analysis (PCoA), the neighbour-net analysis and Mantel test showed a strong correlation between genetic variability and geographic distance. Analysis of molecular variance (AMOVA) revealed that a greater proportion of total genetic variation resided within populations rather than among them. The Structure Bayesian clustering analysis revealed the presence of three distinct genetic groups within studied populations, where 'eastern' genotypes correspond to A. ursinum subsp. ucrainicum, and 'western' to subsp. ursinum; whereas the third genetic group has the largest share in the individuals occurring at the border of the distribution ranges of both subspecies. The emergence of the third genetic group is probably an effect of hybridization events occurring within the secondary contact zone. Typical morphologically intermediate populations occur only in a relatively narrow geographical zone, but the hybrid zone revealed by molecular markers is actually much wider than it is suggested by the morphological pattern of individuals. The current distribution pattern of both subspecies of A. ursinum and their hybrid zone is related to the two main directions of postglacial migration of Fagus sylvatica to the area of Poland. The hybrid zone arose as an effect of the secondary contact of two divergent lineages of A. ursinum.

12

Cytogenetic diversity of Elsholtzia ciliata Benth. (Lamiaceae) from Kashmir Himalaya

72%

Malik R. A., Gupta R. C., Kumari S.

Acta Biologica Cracoviensia. Series Botanica

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2012

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tom 54

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nr 1

Our cytomorphological study of various populations of Elsholtzia ciliata (Lamiaceae) collected from high-altitude sites of Kashmir Himalaya revealed two euploid cytomorphotypes, diploid (n=8) and tetraploid (n=16), growing sympatrically but inhabiting two different habitats. This is the first report of tetraploid (4×) E. ciliata from the Indian subcontinent. We found the course of meiois to be normal in diploids, but tetraploid individuals showed chromosome and meiotic irregularities: cytomixis at early prophase I, stickiness at metaphase I, and chromosome bridges at anaphase I. In tetraploids, 23 of the 26 pollen mother cells observed at metaphase I showed 0–6 quadrivalents, suggesting that the tetraploid is a segmental allopolyploid. Microsporogenesis was also abnormal in tetraploids, showing the formation of triads. All these anomalies are conducive to lower reproductive potential (40.70%) in tetraploids than in diploids (90.50%). Significant morphological differences between the two cytotypes are presented.

13

Mycorrhizal status of Pinus sylvestris L. nursery stock in Poland as influenced by nitrogen fertilization

72%

Rudawska M., Leski T., Gornowicz R.

Dendrobiology

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2001

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tom 46

Indigenous mycorrhizal colonisation of one (1/0) and two (2/0) year old Scots pine (Pinus sylvestris L.) seedlings from forest nurseries situated in the north-west part of Poland was investigated. Seedlings were fertilized after a schedule designed to satisfy their requirements which resulted from soil analysis of each nursery. In autumn needle nitrogen concentration and mycorrhizal status were estimated. As a rule seedlings 1/0 obtained high doses of fertilizers, and their needle nitrogen concentration highly exceeded the recommended optimal level above which mycorrhiza formation is greatly restricted. Highly negative correlation was found between the nitrogen status of foliage and mycorrhizal quantitative and qualitative colonisation estimated in the abundance class of 0-5. When internal nitrogen level was low, several ectomycorrhizal morphotypes were found on roots of tested plants. Excessive nitrogen fertilization decreased root ramification pattern and along with increased pH promoted ectendomycorrhizal symbiosis. Two-year-old seedlings (2/0) were characterised by significantly lower nitrogen concentration in the needles which resulted in much higher ectomycorrhizal colonisation. Ectendomycorrhizal symbiosis in the case of 2/0 seedlings was scarce. The results indicate that natural colonisation in nurseries is dependent on the soil management practices, especially nitrogen fertilization. Optimalization of nitrogen fertilization may intensify ectomycorrhizal colonisation of the nursery stock from indigenous fungal species and improve the growth of Scots pine seedlings in bare-root nurseries and plantations.

14

Three morphotypes of chrysophycean stomatocysts from Poland

72%

Cabala J.

Polish Botanical Journal

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2003

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tom 48

|

nr 1

15

Morphotypical diversity and morphometric characteristics of Keratella cochlearis [Goose, 1851] in stratified lakes

72%

Galkovskaya G. A.

Polish Journal of Ecology

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1998

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tom 46

|

nr 2

16

Palaeobiology, ecology, and distribution of stromatoporoid faunas in biostromes of the mid-Ludlow of Gotland, Sweden

72%

Sandstrom O., Kershaw S.

Acta Palaeontologica Polonica

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2008

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tom 53

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nr 2

Six well exposed mid−Ludlow stromatoporoid−dominated reef biostromes in four localities from the Hemse Group in southeastern Gotland, Sweden comprise a stromatoporoid assemblage dominated by four species; Clathrodictyon mohicanum, “Stromatopora” bekkeri, Plectostroma scaniense, and Lophiostroma schmidtii. All biostromes investigated in this area (of approximately 30 km²) are interpreted to belong to a single faunal assemblage forming a dense accumulation of fossils that is probably the best exposed stromatoporoid−rich deposit of the Silurian. The results from this comprehensive study strengthen earlier interpretations of a combination of genetic and environmental control on growth−forms of the stromatoporoids. Growth styles are similar for stromatoporoids in all six biostromes. Differences in biostrome fabric are due to variations in the degree of disturbance by storms. The uniformity of facies and the widespread low−diversity fauna support the view that palaeoenvironmental conditions were similar across the area where these biostromes crop out, and promoted the extraordinary growth of stromatoporoids in this shallow shelf area.

17

Molecular phylogeny of Spirodinium equi, Triadinium caudatum and Blepharocorys sp. from the equine hindgut

58%

Snelling T., Pinloche E., Worgan H. J., Newbold C. J., McEwan N. R.

Acta Protozoologica

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2011

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tom 50

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nr 4

18

Plonowanie, struktura plonu oraz ksztaltowanie sie morfotypu pszenzyta jarego w zaleznosci od odmiany i ilosci wysiewu

58%

Pisulewska E., Kolodziejczyk M., Witkowicz R.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

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2004

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nr 231

201-209

19

The identity of two morphotypes of Alella macrotrachelus (Brian, 1906) (Copepoda: Siphonostomatoida: Lernaeopodidae) from white seabream, Diplodus sargus (Actinopterygii: Sparidae)

58%

Piasecki W., Kempter J., Saraiva A., Baptista A.

Annals of Parasitology

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2016

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tom 62

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nr Suppl.

20

Theropod teeth from the upper Maastrichtian Hell Creek Formation “Sue” Quarry: New morphotypes and faunal comparisons

58%

Gates T. A., Zanno L. E., Makovicky P. J.

Acta Palaeontologica Polonica

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2015

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tom 60

|

nr 1

Isolated teeth from vertebrate microfossil localities often provide unique information on the biodiversity of ancient ecosystems that might otherwise remain unrecognized. Microfossil sampling is a particularly valuable tool for documenting taxa that are poorly represented in macrofossil surveys due to small body size, fragile skeletal structure, or relatively low ecosystem abundance. Because biodiversity patterns in the late Maastrichtian of North American are the primary data for a broad array of studies regarding non-avian dinosaur extinction in the terminal Cretaceous, intensive sampling on multiple scales is critical to understanding the nature of this event. We address theropod biodiversity in the Maastrichtian by examining teeth collected from the Hell Creek Formation locality that yielded FMNH PR 2081 (the Tyrannosaurus rex specimen “Sue”). Eight morphotypes (three previously undocumented) are identified in the sample, representing Tyrannosauridae, Dromaeosauridae, Troodontidae, and Avialae. Noticeably absent are teeth attributed to the morphotypes Richardoestesia and Paronychodon. Morphometric comparison to dromaeosaurid teeth from multiple Hell Creek and Lance formations microsites reveals two unique dromaeosaurid morphotypes bearing finer distal denticles than present on teeth of similar size, and also differences in crown shape in at least one of these. These findings suggest more dromaeosaurid taxa, and a higher Maastrichtian biodiversity, than previously appreciated.

Ograniczanie wyników

A mysterious giant ichthyosaur from the lowermost Jurassic of Wales

Ultrastructure of Candida albicans pleomorphic forms: phase-contrast microscopy, scanning and transmission electron microscopy

Changed species composition of naked amoebae in soils of forest-and-steppe zone of Ukraine

The spicules of sponges from Lower Cretaceous of the Polish lowlands

Physiological factors affecting yield formation in the canopy of traditional and new morphotypes of triticale plant [Triticosecale Wittmarck]

Morphological variability of Cardaminopsis halleri [L.] HAYEK populations from areas differing in anthropopressure level

Low level genetic diversity of opalinid morphotypes from the digestive tract of Hoplobatrachus rugulosus (Batrachia, Amphibia) in Thailand

Chrysophycean stomatocysts associated with the carnivorous plants (genus Utricularia) from Jeleniak-Mikuliny Nature Reserve

New sauropod trackways from the Middle Jurassic of Portugal

The impact of foliar application of biostimulators on the morphological characteristics of the leaf rosette of winter rape plants

Intraspecific molecular variation of Allium ursinum (Amaryllidaceae) across the border of two subspecies distribution ranges

Cytogenetic diversity of Elsholtzia ciliata Benth. (Lamiaceae) from Kashmir Himalaya

Mycorrhizal status of Pinus sylvestris L. nursery stock in Poland as influenced by nitrogen fertilization

Three morphotypes of chrysophycean stomatocysts from Poland

Morphotypical diversity and morphometric characteristics of Keratella cochlearis [Goose, 1851] in stratified lakes

Palaeobiology, ecology, and distribution of stromatoporoid faunas in biostromes of the mid-Ludlow of Gotland, Sweden

Molecular phylogeny of Spirodinium equi, Triadinium caudatum and Blepharocorys sp. from the equine hindgut

Plonowanie, struktura plonu oraz ksztaltowanie sie morfotypu pszenzyta jarego w zaleznosci od odmiany i ilosci wysiewu

The identity of two morphotypes of Alella macrotrachelus (Brian, 1906) (Copepoda: Siphonostomatoida: Lernaeopodidae) from white seabream, Diplodus sargus (Actinopterygii: Sparidae)

Theropod teeth from the upper Maastrichtian Hell Creek Formation “Sue” Quarry: New morphotypes and faunal comparisons