Wyniki wyszukiwania

1

Taxidiophyllum cf. scoticum v.d.Burgh et v. Konijnenburg-v. Cittert 1984 im unteren Lias von Aninal/Rumanien

100%

Givulescu R.

Acta Palaeobotanica

|

1993

|

tom 33

|

nr 1

47-51

2

Early Jurassic theropod tracks with the metatarsal impressions.

100%

Gierlinski G.

Przegląd Geologiczny

|

1994

|

tom 42

|

nr 04

280-284

3

Poznojurajskie facje gabkowe i warunki ich powstawania

86%

Pisera A.

Działalność Naukowa PAN. Wybrane Zagadnienia

|

1999

|

tom 07

89-90

4

Nowe slady teropodow z wczesnojurajskich osadow Polski.

86%

Gierlinski G.

Przegląd Geologiczny

|

1995

|

tom 43

|

nr 11

931-934

5

Stromatactis w jurajskich budowlach weglanowych okolic Krakowa.

86%

Matyszkiewicz J.

Przegląd Geologiczny

|

1993

|

tom 41

|

nr 04

248-252

6

Paleoekologiczne warunki rozmieszczenia ramienionogow [Brachiopoda] przelomu jury i kredy Pieninskiego Pasa Skalkowego Polski

72%

Krobicki M.

Pieniny. Przyroda i Człowiek

|

1995

|

tom 04

47-58

7

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Sauropod tracks in the Early Jurassic of Poland

72%

Gierlinski G.

Acta Palaeontologica Polonica

|

1997

|

tom 42

|

nr 4

533-538

After the discovery of Early Jurassic sauropod tracks in northern Italy, Polish Liassic strata revealed a second comparably early record of sauropod footprints in Europe. In comparison with the Italian material, described tracks seem to be left by juvenile or small primitive sauropods, presumably 4.4 m and 5.5 m long.

8

Stratygrafia izotopowa oksfordu Wyzyny Krakowsko-Czestochowskiej

72%

Wierzbowski H.

Działalność Naukowa PAN. Wybrane Zagadnienia

|

2001

|

tom 11

155-158

9

Rzadko spotykane gatunki mikrofauny w osadach jury gornej Polski.

72%

Styk O.

Przegląd Geologiczny

|

1992

|

tom 40

|

nr 09

558-559

10

New multituberculate-like teeth from the Middle Jurassic of England

58%

Kermack K. A., Kermack D. M., Lees P. M., Mills J. R. E.

Acta Palaeontologica Polonica

|

1998

|

tom 43

|

nr 4

581-606

New fossil mammal teeth are described from the Middle Jurassic (Bathonian) Forest Marble of Kirtlington, Oxfordshire, England. They are referred to a new genus and species, Eleutherodon oxfordensis, family Eleutherodontidae nov., suborder Eleutherodontida nov., order incertae sedis, assigned to Allotheria Marsh, 1880. These teeth are unique, but share with multituberculates and haramiyids the longitudinal arrangement of their cusps and with the former at least the propalinal action of the jaws in chewing, and palinal movement of the dentary during the power stroke. They differ in that respect from the Greenlandic Late Triassic Haramiyavia clemmenseni in which an orthal movement is predominant.

11

Revised taxonomy of albanerpetontid amphibians

58%

Gardner J. D.

Acta Palaeontologica Polonica

|

2000

|

tom 45

|

nr 1

55-70

Characters of the jaws and frontals are often used to differentiate albanerpetontid genera and species, yet the reliability of these characters has rarely been examined. Frontals are diagnostic for the genera Albanerpeton and Celtedens and for species in the latter genus. The value of frontals at the specific level in Celtedens may be inflated by lack of information about variation in jaw structure. Characters of the frontals, jaws, and body size differentiate species of Albanerpeton. Differential diagnoses are presented for the Albanerpetontidae based on cranial and vertebral characters and for the two named genera based on frontal characters. Each genus is characterized by one autapomorphy: fused frontals triangular in Albanerpeton and internasal process bulbous in Celtedens. An enigmatic albanerpetontid from the Middle Jurassic (upper Bathonian) of England has a unique mixture of frontal and premaxillary character states that precludes it from being included in either Celtedens or Albanerpeton.This leaves the oldest occurrences of the two genera in, respectively, the Late Jurassic (Kimmeridgian) and Early Cretaceous (latest Aptian/earliest Albian).

12

Cyanobacterial key to the genesis of micritic and peloidal limestones in ancient seas

58%

Kazmierczak J., Coleman M. L., Gruszczynski M., Kempe S.

Acta Palaeontologica Polonica

|

1996

|

tom 41

|

nr 4

319-338

The origin of micritic and peloidal limestones comprising the bulk of many ancient marine carbonate deposits represents a major unsolved problem of carbonate sedimentology. Our studies of such limestones from a sequence of Late Jurassic open marine sediments exposed in central Poland revealed them as products of in situ calcified mats of benthic coccoid cyanobacteria. Remains of the cyanobacteria are visible in scanning electron microscope (SEM) images as characteristic patterns closely resembling the common mucilage sheaths of modern entophysalidacean and/or pleurocapsalean cyanobacteria comparable to those we found producing micritic and peloidal microbialites in Lake Van, Turkey. We suggest, by analogy, that many subtidal micritic and peloidal limestones common in the marine sedimentary record might be products of similar in situ calcified cyanobactend microbiota. Such an intensive calcification of marine cyanobacteria could have proceeded only in environments more than modern seawater supersaturated with respect to calcium carbonate minerals. Advection of excess alkalinity, originating from deeper, anaerobic or dysaerobic zones to shallow water areas is proposed as the main factor enhancing colonization of extensive sea bottom areas by the alkaliphilic cyanobacteria and promoting their in uiuo calcification.

13

Wspomnienie z wycieczki przyrodniczej odbytej w południowych okolicach kraju w miesiącu Lipcu r. b. (Dokończenie)

58%

Nusbaum J.

Wszechświat

|

1882

|

tom 1

|

nr 24

14

Microstructural disparity between Recent fungiine and Mesozoic microsolenine scleractinians

58%

Morycowa E., Roniewicz E.

Acta Palaeontologica Polonica

|

1995

|

tom 40

|

nr 4

361-385

The Mesozoic families Microsolenidae, Latomeandridae, Synastreidae and Cunnolitidae basically differ from the Recent fungiids, with which they had traditionally been classified due to their having synapticulae and porous septa. We propose a new suborder Microsolenina for these families because their members possess collar-like structures (pennulae of Gill 1967) spaced along the trabeculae, tending to merge into more or less continuous flanges parallel to the septal distal margin, distributed on each face of the septa. The fungiids, having trabeculae with granulations set off from the trabecular axis towards interseptal space (vepreculae of Jell 1974), are closest to the faviids from which they probably derived.

15

Tube microstructure of Recent and Jurassic serpulid polychaetes and the question of the Palaeozoic spirorbids

58%

Weedon M. J.

Acta Palaeontologica Polonica

|

1994

|

tom 39

|

nr 1

1-15

'Ordered' and 'unordered chevron structures' in serpulid tubes comprise minute calcite lath-like crystals. In ordered chevron structure (Pomatoceros triqueter) the crystals parallel each other within each chevron layer, whilst between layers the alignment direction alternates. The laths have no alignment in unordered chevron structure (Spirorbis and locally in Pomatoceros triqueter). In 'homogeneous chevron structure' (found in Jurassic pomatocerids) the layers comprise a granular or homogeneous fabric. This structure possibly represents a diagenetic replacement of lath-like crystals. Serpulid chevron structures are quite dissimilar from any shell microstructures described in molluscs or lophophorates. The secretion of microstructures comprising lath-like crystals may have allowed rapid tube growth. Spherulitic prismatic structure is identified in Spirorbis; the structure occurs locally in the outer part of the tube. The microstructure of Recent spirorbids is quite dissimilar to that of Palaeozoic fossils (microconchids) previously assigned to the genus Spirorbis.

16

Hartmaniellidae - living fossils among polychaetes

58%

Szaniawski H., Imajima M.

Acta Palaeontologica Polonica

|

1996

|

tom 41

|

nr 2

111-125

The jaw apparatus of the Recent eunicoid polychaete Hartmaniella erecta is closely similar to those of the Mesozoic species of Palurites. It is concluded that the family Hartmaniellidae originated in the late Palaeozoic from an ancestor close to the Paulinitidae and is qlosely related to Kielanoprionidae. The lineage shows an extremaly slow rate of evolution. Hartmaniellids have been abundant during the whole Mesozoic while its Recent representation is only a relic. Palurites jurassicus sp. n. is proposed.

17

Development and calcification of the ammonitella shell

58%

Kulicki C., Doguzhaeva L. A.

Acta Palaeontologica Polonica

|

1994

|

tom 39

|

nr 1

17-44

Aconeceras trautscholdi ammonitellae mass occurring in the Aptian of Symbirsk, central Russia represent consecutive calcification stages of the primary organic shell wall. Already after the formation of the organic shell with proseptum, the first whorl and umbilical walls of the initial chamber were calcified, then the remaining part of the initial chamber, and finally the nacreous primary constriction was formed and the proseptum was calcified. The original mineral participating in calcification was aragonite, which formed primary prismatic layers. The ammonite embryonic shell was thus formed similarly to the archaeogastropod larval shell. This explains the microstructural distinction of the ammonitella and proseptum walls with respect to the rest of the ammonite shell.

18

Propozycja na weekend. Baltowski Park Jurajski

58%

Kapuscinski R.

Przyroda Polska

|

2009

|

nr 08

33-35

19

Oyster life positions and shell beds from the Upper Jurassic of Poland

51%

Machalski M.

Acta Palaeontologica Polonica

|

1998

|

tom 43

|

nr 4

609-634

Life positions of three oyster species, Actinostreon gregareun (J. Sowerby, 1816), Deltoideum delta (Smith, 1817), and Nanogyra virgula (Defrance, 1820) from the Polish Upper Jurassic (Kimmeridgian and Volgian) sequences, mainly from the parautochthonous shell beds, are reconstructed. The oysters reveal variation in morphology and/or settling behaviour, which is interpreted in terms of ecophenotypic response to the fluctuations in sedimentation rate and the softness of substrate. Both A. gregareum and D. delta could 'choose' between a mud-sticking and reclining mode of life. The latter sfrategy is manifested e.g., by a cup-shaped, Gryphaea-like morphotype documented for the first time in D. delta. N. virgula was previously regarded as a cup-shaped recliner, but the collected material suggests that many specimens could live in a lateral position or form clusters composed of mutually attached specimens. Sedimentation rates during the oyster life cycles can be inferred from the reconstructed oyster life positions and ranged from approximately 7-13 cm in the case of largest mud-sticking specimens to nil in flat, fan-shaped recliners. The oyster life habits can thus provide valuable insights into sedimentary and ecologic dynamics of oyster shell beds. The Actinostreon beds originated under dynamic bypassing conditions, whereas Deltoideum beds in a regime of starvation or total bypassing of sediment. In the case of the Nanogyra virgula beds, the evidence is ambiguous due to difficulties in reconsfructing the life attitude of many specimens of this species.

20

Anatomical distinctions of the Mesozoic lingulide brachiopods

51%

Biernat G., Emig C. C.

Acta Palaeontologica Polonica

|

1993

|

tom 38

|

nr 1-2

1-20

The long held view that Lingula represents an extremely bradytelic lineage is questioned. Examination of Mesozoic lingulides has shown that they significantly differ from their Recent relatives Lingula and Glottidia in having longer lophophoral cavities, shorter ventral canals, better developed posterior adductor muscles, and less acute umbones. Morphological characters of the shell interior are needed to identify members of the Lingulidae, not solely external shell characteristics. The apparent evolutionary tendency towards a reduction of the volume of the lophophoral cavity contradics the traditional view that the ‘living fossil’ Lingula has survived without significant morphological change since the Paleozoic. Actually the today living lingulide genera probably arose in the early Cenozoic. A new inarticulate brachiopod genus, Lingularia is introduced, with three new species. Middle Triassic L. siberica, Middle Jurassic L. similis, and Cretaceous L. smirnovae.

Ograniczanie wyników

Taxidiophyllum cf. scoticum v.d.Burgh et v. Konijnenburg-v. Cittert 1984 im unteren Lias von Aninal/Rumanien

Early Jurassic theropod tracks with the metatarsal impressions.

Poznojurajskie facje gabkowe i warunki ich powstawania

Nowe slady teropodow z wczesnojurajskich osadow Polski.

Stromatactis w jurajskich budowlach weglanowych okolic Krakowa.

Paleoekologiczne warunki rozmieszczenia ramienionogow [Brachiopoda] przelomu jury i kredy Pieninskiego Pasa Skalkowego Polski

Sauropod tracks in the Early Jurassic of Poland

Stratygrafia izotopowa oksfordu Wyzyny Krakowsko-Czestochowskiej

Rzadko spotykane gatunki mikrofauny w osadach jury gornej Polski.

New multituberculate-like teeth from the Middle Jurassic of England

Revised taxonomy of albanerpetontid amphibians

Cyanobacterial key to the genesis of micritic and peloidal limestones in ancient seas

Wspomnienie z wycieczki przyrodniczej odbytej w południowych okolicach kraju w miesiącu Lipcu r. b. (Dokończenie)

Microstructural disparity between Recent fungiine and Mesozoic microsolenine scleractinians

Tube microstructure of Recent and Jurassic serpulid polychaetes and the question of the Palaeozoic spirorbids

Hartmaniellidae - living fossils among polychaetes

Development and calcification of the ammonitella shell

Propozycja na weekend. Baltowski Park Jurajski

Oyster life positions and shell beds from the Upper Jurassic of Poland

Anatomical distinctions of the Mesozoic lingulide brachiopods