Wyniki wyszukiwania

1

Gattung Cnemidiastrum [Demospongia, Rhizomorina] nach dem Material aus dem Weissen Jura von Zalas

100%

Malecki J.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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1994

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tom 42

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nr 4

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Gertruda Biernat (1923–2016)

88%

Halamski A. T., Balinski A.

Acta Palaeontologica Polonica

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2016

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tom 61

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nr 2

3

Candle wax shells, morphodynamics, and the Cambrian explosion

88%

Seilacher A.

Acta Palaeontologica Polonica

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1993

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tom 38

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nr 3-4

4

Karol Sabath (1963–2007)

75%

Kielan-Jaworowska Z.

Acta Palaeontologica Polonica

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2007

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tom 52

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nr 4

5

Siluro-Devonian of Podolia, Ukraine: Paleobiological, biostratigraphic, and geochemical aspects

75%

Szaniawski H.

Acta Palaeontologica Polonica

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2012

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tom 57

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nr 4

6

Beobachtungen zur Okologie von Kieselspongien aus dem Biohermen aus dem Weissen Jura von Zalas

75%

Malecki J.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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1996

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tom 44

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nr 3

7

Halszka Osmolska [1930-2008]

75%

Borsuk-Bialynicka M., Maryanska T.

Acta Palaeontologica Polonica

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2008

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tom 53

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nr 2

8

Carved teeth and strange jaws: how glyptodonts masticated

75%

Farina R. A., Vizcaino S. F.

Acta Palaeontologica Polonica

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2001

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tom 46

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nr 2

In this paper, the highly peculiar masticatory apparatus of glyptodonts is studied. The general morphology of the skull is analysed using a morphometric procedure, the Resistant Fit Theta Rho Analysis, which allows comparison among different biological forms. Here, a large terminal form, the late Pleistocene genus Glyptodon, is compared with the smaller primitive Miocene genus Propalaehoplophorus, and with the generalised Recent armadillo Chaetophractus. The masticatory musculature of glyptodonts is reconstructed. Their tooth form and wear facets, as well as their mandibular symphysis and jaw joint, are analysed. A model of jaw movement is constructed based on these analyses. It is demonstrated that the masticatory apparatus of glyptodonts had undergone a telescoping process, which was already underway in the most ancient forms whose skull is known. This process created problems in regard to the way stresses produced by mastication were absorbed by the mandible, and therefore it might be regarded as non-adaptive. Some functional explanatory hypotheses are discussed, such as a requirement of keeping the moment of the weight of the cranium small enough to be counterbalanced by the neck muscles, or fitting the head into the armour.

9

Insectivore mammals from the Late Miocene of the Republic of Moldova

63%

Rzebik-Kowalska B., Lungu A.

Acta Zoologica Cracoviensia. Ser.A Vertebrata

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2009

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tom 52A

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nr 1-2

10

Malacological and palynological evidence of Early Pleistocene cooling of the climate in the Carpathian Foreland

63%

Stworzewicz E., Granoszewski W., Wojcik A.

Folia Malacologica

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2012

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tom 20

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nr 1

11

New material of the shrew Macroneomys FEJFAR, 1966 (Mammalia, Soricomorpha, Soricidae) from the British early Middle Pleistocene, with comments on its palaeobiology and European range

63%

Parfitt S. A., Harrison D. L.

Acta Zoologica Cracoviensia. Ser.A Vertebrata

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2011

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tom 54A

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nr 1-2

12

The earliest known venomous animals recognized among conodonts

63%

Szaniawski H.

Acta Palaeontologica Polonica

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2009

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tom 54

|

nr 4

Conodonts, a large group of tiny extinct marine animals ranging in age from the Late Cambrian to Late Triassic (ca. 500 to 200 Mya), are usually considered as jawless vertebrates. Their only commonly occurring fossilized remains are minute, phosphatic, teeth−like elements of their feeding apparatuses. In most of the early conodonts the elements were conical and strongly elongated. Many of them are characterized by possession of a deep, longitudinal groove, usually associated with sharp edges or ridges. A comparative study of the grooved elements and venomous teeth and spines of living and extinct vertebrates strongly suggests that the groove in conodonts was also used for delivery of venom. Structural convergence of the conodont apparatus Panderodus with the grasping apparatus of chaetognaths, a group of extant, venomous invertebrate predators of similarly ancient origin, provides additional support for this conclusion.

13

Trochiliscus (Eutrochiliscus) cf. bulbiformis Karpinsky (Charophyta) in the Devonian limestone of Traunkammen, Spitsbergen

63%

Wrona R. M.

Acta Palaeontologica Polonica

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1977

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tom 22

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nr 3

The fossil Charophyta from the Devonian sediments of Spitsbergen are here described for the first time and classified to the species rank on the basis of thin sections.

14

Classification of fossil eggshells of amniotic vertebrates

63%

Mikhailov K. E.

Acta Palaeontologica Polonica

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1991

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tom 36

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nr 2

Fossil avian and reptilian eggs and eggshells, from the Cretaceous of Mongolia and USSR (Kazakhstan, Zaisan basin) as well as samples of dinosaurian and the Eocene avian eggshells from USA, China, France and Argentina were studied. Methodological, terminological and biomineralization aspects of eggshell structure are discussed. Considered are different classifications of eggshell according to the structural levels of eggshell matter organization (texture, general histostructure, superficial morphology). Basic types, morphotypes, types of pore system and types of surface ornamentation are the main structural categories employed in the systematic description of fossil material. About 18 groups of fossil eggshells referred to turtles, geckoes, crocodiles, and to 14 “families” or dinosaur and bird oological remains are described. Their composition, occurence, paleobiology and systematics are shortly presented.

15

A new species of the sauropsid reptile Nothosaurus from the Lower Muschelkalk of the western Germanic Basin, Winterswijk, The Netherlands

63%

Klein N., Albers P. C. H.

Acta Palaeontologica Polonica

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2009

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tom 54

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nr 4

A nothosaur skull recently discovered from the Lower Muschelkalk (early Anisian) locality of Winterswijk, The Netherlands, represents at only 46 mm in length the smallest nothosaur skull known today. It resembles largely the skull morphology of Nothosaurus marchicus. Differences concern beside the size, the straight rectangular and relative broad parietals, the short posterior extent of the maxilla, the skull proportions, and the overall low number of maxillary teeth. In spite of its small size, the skull can not unequivocally be interpreted as juvenile. It shows fused premaxillae, nasals, frontals, and parietals, a nearly co−ossified jugal, and fully developed braincase elements, such as a basisphenoid and massive epipterygoids. Adding the specimen to an existing phylogenetic analysis shows that it should be assigned to a new species, Nothosaurus winkelhorsti sp. nov., at least until its juvenile status can be unequivocally verified. Nothosaurus winkelhorsti sp. nov. represents, together with Nothosaurus juvenilis, the most basal nothosaur, so far.

16

Evolution of retiolitid graptolites - a synopsis

63%

Kozlowska-Dawidziuk A.

Acta Palaeontologica Polonica

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2004

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tom 49

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nr 4

Twenty million years of retiolitid evolution reflect environmental changes, the most severe being the Silurian Cyrtograptus lundgreni Event. Five biostratigraphically and morphologically constrained retiolitid faunas are distinguished and characterized according to their rhabdosomal modifications: (1) the oldest and long−ranging Llandovery group of mostly large and morphologically complex rhabdosomes, (2) the less diverse Telychian−Sheinwoodian group, (3) the Cyrtograptus lundgreni Biozone varied group of intermediate size, and two short−ranged (4) late Homerian, and (5) early Ludlow groups with small rhabdosomes. Although the evolutionary history of retiolitids was complex and not linear, a common tendency toward reduction of rhabdosome size in most lineages is observed. The greatest reduction in both number and volume of thecae, and in skeletal elements is demonstrated in the Gothograptus and Plectograptusfaunas. Contrary to the thecal decrease, a distinctive increase of sicula size is observed in retiolitids. Two types of colonies are distinguished: L−colonies with a small sicula and numerous large thecae of similar size, and S−colonies with a long sicula and a few, small thecae. These changes imply modification of the soft body: an increase in siculozooid length and a decrease in the size of the zooids. Thus, the siculozooid probably produced great amounts of morphogen inhibiting zooid growth. In consequence the phenomenon of colony reduction occurred. The most extreme stages of rhabdosome reduction in Ludlow retiolitids can be seen in Plectodinemagraptus gracilis of the Plectograptuslineage and in the new species Holoretiolites helenaewitoldi, possibly representing the last stage of skeletal reduction in the Gothograptus lineage; the next hypothetical stage would be its total loss. The sicula length of Holoretiolites, about 2 mm, is reported herein for the first time.

17

40 years of the Institute of Paleobiology of the Polish Academy of Sciences

63%

Olempska E.

Acta Palaeontologica Polonica

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1992

|

tom 37

|

nr 1

18

Recent foraminifera from Goulden Cove of King George Island, Antarctica

63%

Gazdzicki A., Majewski W.

Polish Polar Research

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2003

|

tom 24

|

nr 1

19

A new trachypsammiid cnidarian from the Late Permian of Spitsbergen

63%

Nowinski A.

Polish Polar Research

|

1997

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tom 18

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nr 3-4

20

Dragonflies preserved in transparent gypsum crystals from the Messinian [Upper Miocene] of Alba, Northern Italy

63%

Schluter T., Kohring R., Gregor H. J.

Acta Zoologica Cracoviensia

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2003

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tom 46

|

nr Suppl.

From the Upper Miocene (Messinian) of the Alba area in Piedmont, northern Italy, are fossil dragonflies (mainly larvae) described, which were preserved in transparent gypsum crystals. The specimens belong probably to a single species (Oryctodiplax gypsorum), but occur in various pre-imaginal stages. This individual-rich but species-poor palaeoentomofauna appears to be almost autochthonous in origin and may have developed under hypersalinar conditions in a lagoonal environment during the Messinian salinar event.

Ograniczanie wyników

Gattung Cnemidiastrum [Demospongia, Rhizomorina] nach dem Material aus dem Weissen Jura von Zalas

Gertruda Biernat (1923–2016)

Candle wax shells, morphodynamics, and the Cambrian explosion

Karol Sabath (1963–2007)

Siluro-Devonian of Podolia, Ukraine: Paleobiological, biostratigraphic, and geochemical aspects

Beobachtungen zur Okologie von Kieselspongien aus dem Biohermen aus dem Weissen Jura von Zalas

Halszka Osmolska [1930-2008]

Carved teeth and strange jaws: how glyptodonts masticated

Insectivore mammals from the Late Miocene of the Republic of Moldova

Malacological and palynological evidence of Early Pleistocene cooling of the climate in the Carpathian Foreland

New material of the shrew Macroneomys FEJFAR, 1966 (Mammalia, Soricomorpha, Soricidae) from the British early Middle Pleistocene, with comments on its palaeobiology and European range

The earliest known venomous animals recognized among conodonts

Trochiliscus (Eutrochiliscus) cf. bulbiformis Karpinsky (Charophyta) in the Devonian limestone of Traunkammen, Spitsbergen

Classification of fossil eggshells of amniotic vertebrates

A new species of the sauropsid reptile Nothosaurus from the Lower Muschelkalk of the western Germanic Basin, Winterswijk, The Netherlands

Evolution of retiolitid graptolites - a synopsis

40 years of the Institute of Paleobiology of the Polish Academy of Sciences

Recent foraminifera from Goulden Cove of King George Island, Antarctica

A new trachypsammiid cnidarian from the Late Permian of Spitsbergen

Dragonflies preserved in transparent gypsum crystals from the Messinian [Upper Miocene] of Alba, Northern Italy