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1
Content available Nowy zespół kręgowców z marginalnomorskich i lądowych osadów dolnego kajpru (ladyn, środkowy trias) z Miedar na Śląsku
Sulej T., Niedźwiedzki G., Niedźwiedzki R., Surmik D., Stachacz M.
Przegląd Geologiczny
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2011
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Vol. 59, nr 5
426-426
EN
Vertebrate remains, mostly nothosaurid vertebrae and long bones, archosaur partially preserved long bones and teeth (probably rauisuchid remains), fish teeth and scales, are described from the Lower Keuper Miedary Beds (Ladinian, Middle Triassic) of Miedary, Silesia, SW Poland. The analyzed vertebrate fossils were collected from three lithologically different types of deposits. The first assemblage, which contains nothosaurid and fish remains, occurs in yellowish dolomites, where poorly preseved invertebrate macrofossils were also found (marine bivalves and brachiopods). In grey-yellowish, sometimes greenish or red clays, rare isolated bones and teeth of large archosaur were found. In sandstone intercalations partially preserved and highly disarticulated fish fossils were identified. In all assemblages osteological remains are generally very well preserved. This new interesting vertebrate bones association from the upper part of the Middle Triassic marginal-marine strata of Poland has been correlated with age-equivalents from other regions of Europe.
2
Content available Oxygen isotope analysis of shark teeth phosphates from Bartonian (Eocene) deposits in Mangyshlak peninsula, Kazakhstan
Pelc A., Hałas S., Niedźwiedzki R.
Mineralogia
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2011
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Vol. 42, iss. 1
53--61
EN
We report the results of high-precision (±0.05‰) oxygen isotope analysis of phosphates in 6 teeth of fossil sharks from the Mangyshlak peninsula. This precision was achieved by the offline preparation of CO2 which was then analyzed on a dual-inlet and triple-collector IRMS. The teeth samples were separated from Middle- and Late Bartonian sediments cropping out in two locations, Usak and Kuilus. Seawater temperatures calculated from the δ18O data vary from 23–41oC. However, these temperatures are probably overestimated due to freshwater inflow. The data point at higher temperature in the Late Bartonian than in the Middle Bartonian and suggest differences in the depth habitats of the shark species studied.
3
Content available An explanation for low endemism of Triassic crinoids fromthe epicontinental Germanic Basin, Poland
Salamon M. A., Niedźwiedzki R.
Geological Quarterly
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2005
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Vol. 49, No. 3
331--338
EN
A summary of known crinoid taxa in the Polish part of the Triassic Germanic Basin, including their presence elsewhere, is documented. At present, 13 taxa and 3 ecophenotypes of crinoids have been recorded from that area, only one of them being endemic. In the Lower Muschelkalk and lower part of theMiddleMuschelkalk, taxa widespread both in the Tethys and Germanic Basin, or Tethyan taxa, dominate. In the Upper Muschelkalk crinoids are very rare in Poland, being represented by Encrinus liliiformis and Holocrinus sp. Many of the species occurring in the central part of the Germanic Basin in the Upper Muschelkalk have not been recorded in the eastern part of the basin. The degree of endemism of the crinoid fauna in theMuschelkalk is markedly lower than the degree of endemism of the rest of the benthonic macrofauna. This probably resulted from huge number of crinoids forming "crinoid gardens" that produced large number of larvae, increasing the chances of successful geographical expansion of crinoids.
4
Content available remote New paleontological data from the Turonian and Coniacian of the Opole Trough (SW Poland)
Niedźwiedzki R., Godlewska A.
Geologia Sudetica
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2005
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Vol. 37
27-33
EN
This report is on the first Micrabaciidae (Micrabacia sp.) solitary corals to have been found in the Upper Cretaceous deposits of the Opole Trough. We also present descriptions of the first nautilids (Cymatoceras sp.; smooth-shelled Nautilidae), regular echinoids (Gauthieria radiata (Sorignet, 1850) and solitary corals (Parasmilia sp.) to have been found in the Lower Coniacian of the Opole region.
5
Content available remote Age, distribution, and phylogeny of the peculiar Late Devonian ammonoid Soliclymenia
Korn D., Niedźwiedzki R., Posieczek J.
Acta Geologica Polonica
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2005
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Vol. 55, no. 2
99-108
EN
New records of the triangularly coiled Soliclymenia paradoxa (MUNSTER, 1839) from Dzikowiec (Sudetes, Poland) allow the study of intraspecific variability. It can be demonstrated that at least three species within the genus Soliclymenia can be separated. The genus has a limited stratigraphic distribution within the .Wocklumeria Stufe. of the Late Devonian, but a wide geographic range within the tropical seas.
6
Content available New data on Middle Triassic echinoderms from the Sudetes Mountains
Salamon M., Niedźwiedzki R., Walter R.
Geological Quarterly
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2003
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Vol. 47, No 2
133-138
EN
This paper describes the Triassic ophiuroid genus Aspiduriella and outlines the stratigraphic ranges of crinoids and echinoids in the Lower Muschelkalk strata of the North-Sudetic Basin. It is shown that, contrary to previous opinion, echinoderm taxa occurred in the North-Sudetic Basin at the same time as in other areas of the eastern part of the Germanic Basin.
7
Content available A new ceratite record from Upper Silesia (Poland)
Salamon M., Eagle M. K., Niedźwiedzki R.
Geological Quarterly
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2003
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Vol. 47, No 3
281-288
EN
A new ceratite locality from Gołuchowice (Upper Silesia, Poland) is described. Ceratites from the spinosus group found there include Ceratites (Acanthoceratites) cf. praespinosus, found for the first time in Upper Silesia. Five ceratite zones are proposed for that region: pulcher, robustus, compressus, evolutus and spinosus. The taxonomic compositions of individual ceratite zones from Upper Silesia are almost identical to those of corresponding zones from the Holy Cross Mountains. However, ceratite zones in Poland show lower taxonomic diversity than their equivalents in Germany.
8
Content available remote Late Cretaceous sharks in the Opole Silesia region (SW Poland)
Niedźwiedzki R., Kalina M.
Geologia Sudetica
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2003
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Vol. 35
13-24
EN
The upper Cretaceous deposits of the Opole Trough contain rare but relatively diverse shark teeth, mainly from ptychodontid sharks (Ptychodus latissimus Agassiz, 1843, Ptychodus polygyrus Agassiz, 1843 and Ptychodus mammillaris Agassiz, 1843), Anacoracidae (Squalicorax sp.), Mitsukurinidae (Scapanorhynchus raphiodon (Agassiz, 1843)), Alopiidae (Paranomotodon angustidens (Reuss 1845)) and Cretoxyrhinidae. Paranomotodon angustidens has not previously been reported from the Opole Trough. The selachians from the Opole Basin can be divided into two trophic groups: bottom-dwelling ptychodontid sharks with a diet consisting of shelly invertebrates, and pelagic Lamniformes, which were active predators feeding on fast-swimming fish and reptiles. The morphology of the teeth, signs of abrasion and the analysis of the invertebrate assemblage from the Opole Cretaceous suggest that the ptychodontids fed on inoceramid bivalves, while the lamniform sharks fed mostly on fish. Lamniformes live in all marine environments, and their remains are numerous in all the lithostratigraphic units of the Upper Cretaceous in the Opole Trough. The teeth of deep-water ptychodontid sharks are only abundant in the middle part of the Middle Turonian sediments. Nearshore shark remains are extremely rare in the Cretaceous deposits of the Opole Trough. This indicates that the Middle Turonian (middle I. lamarcki Zone) represents the deepest environment of the Opole Cenomanian and Turonian .
9
Content available remote Zespół skamieniałości a biocenoza - reprezentatywność zapisu paleontologicznego
Niedźwiedzki R.
Przegląd Geologiczny
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2002
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Vol. 50, nr 10/1
899-904
PL
Podczas przeobrażania się biocenozy w oryktocenozę największe znaczenie mają czynniki oddziaływujące na nekrocenozę, zwłaszcza rozkład organizmów bezszkieletowych, w rezultacie którego w tafocenozie nie zachowuje się przeciętnie od ok. 70% gatunków (w środowiskach morskich) do ponad 90% gatunków (w środowiskach lądowych) występujących w biocenozie. Wśród zwierząt szkieletowych podstawowymi czynnikami działającymi na etapie nekrocenozy jest dysartykulacja i fizyczne, chemiczne lub biologiczne niszczenie szkieletów. Procesy te działają często selektywnie w zależności od przynależności taksonomicznej, a także od wielkości okazów i niekiedy uniemożliwiają odtworzenie liczebności taksonów. Bardzo istotne jest uśrednianie czasowe, które zachodzi zarówno w obrębie nekrocenozy, jak i tafocenozy. Zjawisko to powoduje nadreprezentację wielu taksonów oraz niemożność obserwowania krótkoterminowych zmian biocenozy. Po utworzeniu się tafocenozy zachodzą dalsze zmiany zespołu skamieniałości, m.in. w wyniku rozpuszczania szkieletów aragonitowych oraz pokryw chitynowych. Dlatego w artykule używam terminu "oryktocenoza" dla zespołów skamieniałości zachowanych do czasów współczesnych.
EN
Most important for post-mortem modification of biocoenosis structure are processes which influenced the necrocoenosis, especially nonpreservation of soft-bodied organisms. This factor alone may eliminate from about 70% species in marine environments to more than 90% species in terrestrial environments. Shelly communities are changed post-mortem mainly by disarticulation and by physical, chemical or biological destruction. These factors are strongly selective and their importance depend on taxonomic position and size of specimens. Such processes can seriously hamper the recognition of abundance of specimens and proportions of taxa. Time-averaging is very important for modification both the necrocoenosis and the taphocoenosis. The consequences of this phenomenon are preservational bias favouring some taxa of the taphocoenosis and the fact, that short-term biologic phenomena are extremely rarely observed in the fossil assemblages. Many kind of taphocoenosis modifications are documented, e.g., dissolution of aragonite shells or chitinous integuments. Therefore, I use the term " orictocoenosis "for assemblages of fossil remains preserved to our times.
10
Content available Revision of stratigraphic ranges of selected invertebrate taxa from the Muschelkalk in Silesia
Niedźwiedzki R.
Geological Quarterly
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2002
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Vol. 46, No 2
219-234
EN
New occurrences of some invertebrates in the Silesian Muschelkalk are presented, hanging the stratigraphic ranges of these taxa, especially in the Dziewkowice Formation. 13 taxa have been found for the first time in this formation or had their stratigraphic ranges revised in the last two decades.
11
Content available remote Późnotriasowe cmentarzysko kręgowców lądowych w Krasiejowie na Śląsku Opolskim
Dzik J., Sulej T., Kaim A., Niedźwiedzki R.
Przegląd Geologiczny
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2000
|
Vol. 48, nr 3
226-235
PL
W obrębie serii ilastej „retyku” w Krasiejowie koło Ozimka zidentyfikowany został poziom, zawierający liczne czaszki i fragmenty szkieletów kontynentalnych czworonogów (głównie ziemnowodnych). Dominują wielkie labiryntodonty Metoposaurus, tekodonty (fitozaury) Paleorhinus, pancerne roślinożerne tekodonty z rodziny Aetosauridae, drapieżne labiryntodonty z nadrodziny Capitosauroidea, oraz znane tylko z pojedynczych kości najpierwotniejsze dinozaury. Bardzo rzadkie są zęby ryb dwudysznych Ceratodus i łuski ryb ganoidowych. Szczątkom kręgowców towarzyszą liczne małże słodkowodne z grupy unionidów, a w próbkach mikropaleontologicznych w wielkiej obfitości występują ramienice, wskazujące na słodkowodne środowisko sedymentacji. Jest to typowy zespół fauny Paleorhinus, o niemal globalnym rozprzestrzenieniu ograniczonym czasowo do środkowej i późnej części karniku. Paleontologiczne datowanie warstw zlokalizowanych nad ostatnimi wystąpieniami gipsu oznacza konieczność rewizji stratygrafii i korelacji wiekowej tej części polskiego triasu.
EN
A new Paleorhinus/auna has been discovered in a grey claystone corresponding to the subsurface Drawno beds, which are exposed in a cement plant claypit at Krasiejów near Opole in southern Poland. The vertebrate assemblage of perfectly preserved skeletons, isolated skulls, and postcranial remains is dominated with labyrinthodonts Metoposaurus di&gnosticus, the phytosaur Paleorhinus sp. being the second in number. Aetosaurs are represented by an incomplete skull, scuta and fragmentary bones. One sacral bone most probably representing an early dinosaur related to Staurikosaurus or Chindesaurus and two incomplete maxilla with teeth showing serration parallel to the cusp have also been found. The Krasiejów assemblage includes also dipnoans Ceratodus, undetermined fish scales and teeth, numerous unionid bivalves, very abundant characean gyrogonites, and ostracods. The Paleorhinus species is relatively short-snouted and may represent an earlier stage in the evolution of the lineage than fhe populations from Blasensandstein in Franconia and other known Yz\eor\ńm\s faunas. This is consistent with the presence q/Metoposaurus diagnosticus, the species originally described from the Schilfsandstein, located below the Blasensandstein. An equivalent ofSchilfsandstein is known in boreholes drilled nearby the locality and the bone-bearing horizon is about 80 m above its top, and about 20 m above the last occurrence of gypsum in the section. Lehrberg Schichten in Germany seem thus to be its lateral equivalents, both presumably representing the final event in the middle to late Carnian eustatic cycle. The Paleorhinus/a""a was apparently persistent in the area, as an incomplete skeleton has been found about 8 m below the mostfossiliferous horizon, in a calcareous intercalation within red clays comparable with the German Rote Wand.
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