Wyniki wyszukiwania - Biblioteka Nauki

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Koncepcja Geoparku Przyrodniczo-Kulturowego "Szczercowskie Diamenty"

100%

Kin A.

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tom 29

2

First record of the fossil dragonfly family Eumorbaeschnidae from the Upper Jurassic of Poland

63%

Bechly G. , Kin A.

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nr 1

XX

The fossil dragonfly Eumorbaeschna adriankini sp. nov. is decribed as first fossil insect from the Upper Jurassic of Central Poland (Owadów−Brzezinki quarry, Tomaszów Mazowiecki area), and as first record of the family Eumor− baeschnidae (Odonata, Anisoptera, Aeshnoptera) outside the Solnhofen lithographic limestone.

3

The phymosomatid echinoid Trochalosoma taeniatum from the Maastrichtian (Upper Cretaceous) of southeast Poland

63%

Jagt J. , Kin A.

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tom Vol. 60, no. 3

429-435

EN

The phymosomatid Trochalosoma taeniatum (von Hagenow, 1840) is recorded for the first time from upper Maastrichtian strata exposed at Piotrowice, near Lublin, southeast Poland. Although fragmentary, the single, moderately preserved test is of note in representing one of the larger individuals of this species on record (estimated diameter > 60 mm), and in displaying crenulate ambulacral and interambulacral tubercles, at least adapically. Previous records of T. taeniatum include the lower and upper Maastrichtian of Denmark, northern Germany (Rugen), Alava (northern Spain) and Mangyshlak (Kazakhstan). Trochalosoma corneti (Cotteau, 1875), from the upper Maastrichtian of southern and northeast Belgium (Mons and Liege basins, respectively) and the southeast Netherlands (type area of the Maastrichtian Stage), synonymised by some authors with T. taeniatum, is considered to be distinct.

4

Queues of blind phacopid trilobites Trimerocephalus: A case of frozen behaviour of Early Famennian age from the Holy Cross Mountains, Central Poland

51%

Radwański A. , Kin A. , Radwańska U.

Acta Geologica Polonica

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2009

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tom Vol. 59, no. 4

459-481

EN

An assemblage of blind phacopid trilobites of the genus Trimerocephalus McCoy, 1849, representing either the species Trimerocephalus mastophthalmus (Reinhard Richter, 1856) or its allies (possibly, a new species), from an Early Famennian (Early Marginifera Zone) marly sequence of the Holy Cross Mountains, Central Poland, is composed of well organized single-file queues. The trilobites in the queues appear almost intact, having been preserved in the position they kept when forming the queues, and are interpreted showing migratory behaviour known in various present-day arthropods, but unreported from the fossil state. This queuing was induced by environmental stress caused by a dramatic drop in sea level, temporarily leading to emersion. The preservation of the queues at omission horizons is thus ascribed to a mass mortality event, caused by subaerial exposure. The trilobites were suffocated and fossilized in a mortal spasm, and finally blanketed by calcareous ooze when inundated at a highstand. The assemblage of trilobite queues represents a unique example of frozen behaviour and a snapshot of the geological past.

5

Comparative oxygen and carbon isotopic records of Miocene and recent lacustrine unionid bivalves from Poland

38%

Błażejowski B. , Racki G. , Gieszcz P. , Małkowski K. , Kin A. , Krzywiecka K.

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2013

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tom Vol. 57, No. 1

113–-122

EN

The δ13C and δ18O isotope data from both fossil (Miocene) and modern freshwater bivalve shells of family Unionidae from Poland (species Margaritifera flabellatiformis and Unio tumidus, respectively) show a similar, truncated sinusoidal pattern.. The isotopic profiles of the whole shell are visibly marked by three growth stages, linked with a progressive loss of environmental record because of declining intra-annual biocarbonate accretion rate. The juvenile and gerontic phases exhibit generally more positive and stable (plateau) isotopic pattern than the mid-age stage. An increasing δ13C trend is typical for the final life stage, likely influenced by nutrient overloading, reversing the tendency towards δ13C depletion throughout the individual’s life induced by metabolic processes. Due to the progressive loss of environmental signals through ontogeny, these initial and final isotopic profile segments probably correspond to, respectively, an instant signature of the first season growth, and a multiyear value set of summer maxima during geriatric stage. Vague seasonal cyclic record is the striking feature of the mid-age δ18O and δ13C profile slices. In case of low-amplitude δ18O curve, this is probably promoted by a sensitivity of the lake ecosystem to many dynamic intra-annual factors affecting water budget balance. This consistent signature mode seems to be typical for lake-dwelling unionid shells at least since Miocene from different climatic zones, as confirmed by coeval lacustrine low-latitude mussels from Amazonia. Thus, this isotope record is relevant to obtain information on the habitat and life cycle of the fossil freshwater bivalves, as well as could help understand modern environmental change.