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EN
A taxonomic account of the Callovian crinoid fauna from the Żebrak IG 1 borehole (eastern Poland) is presented. The assemblage contains numerous isocrinid ossicles (Isocrinidae) assigned to the following taxa: Isocrinus cf. nicoleti (Desor), Isocrinus sp., Chariocrinus andreae (Desor), Balanocrinus cf. subteres (Münster in Goldfuss) and Pentacrinites sp. These isocrinids are associated with a few ossicles of cyrtocrinids (Cyrtocrinida; Cyrtocrinida indet.). The crinoid remains are poorly preserved; they all are isolated ossicles, showing broken margins and/or abraded surfaces. Such a state of preservation documents a long distance of transportation and/or re-deposition in a high-energy, shallow-water setting. The crinoid assemblage differs significantly from those of southern Poland (the Polish Jura Chain and the Mesozoic margin of the Holy Cross Mountains), in which sessile crinoids, such as cyrtocrinids (Cyrtocrinida), inhabiting mostly deeper-water carbonate facies, are predominant.
EN
Distinct faunal accumulations in the uppermost Bajocian/lowermost Bathonian, lowermost and Middle Bathonian of the Polish Jura (south-central Poland) have been detected. The fossils are densely packed in the centre of the accumulations and more or less dispersed in their margins. The accumulations vary in size, but all are rich in various groups of organisms, of which the molluscs (mainly bivalves) and echinoderms predominate. The echinoderms are all disarticulated, and shelly fauna occur as angular fragments with sharp edges, of random sizes and without any signs of abrasion. The different sizes of the fossil remains, from tiny echinoderm ossicles or juvenile shelly fauna to medium-sized shell fragments or belemnite rostra, exclude any transportation and thus sorting. Worth of noting is the occurrence of similar faunal groups in each accumulation. The general shape and composition of the accumulations, as well as their taphonomical features, especially the angularity of shell fragments, point to durophagous (shell-crushing) predation rather than physical processes. The various organisms may indicate that the potential predator (most probably fish) fed on various invertebrates. The indigestible particles were later regurgitated forming the accumulations discussed. The presence of various epibionts on the fossil fragments indicate,that they rested upon the sea-floor for some time-span after they had been regurgitated. Then the scavengers, as well as current action or water movements, have been responsible for dispersion of some of the fossils, as is well-visible at the margins of the investigated accumulations..
EN
A few isolated columnals of a holocrinid have been found in Ladinian Upper Muschelkalk deposits (probably Ceratites Beds) in the OEwioelina valley (northern margin of the Holy Cross Mts.). Although they are poorly preserved and not diagnostic at species level, this is the first occurrence of the genus Holocrinus in the Upper Muschelkalk of the eastern part of the Germanic Basin. This crinoid indicates faunal immigration from the Tethys through reactivated East-Carpathian Gate.
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.
EN
The paper reports first undoubted occurrence of crinoid species Encrinus cf. liliiformis from the Upper Muschelkalk (Middle Triassic) of Poland. Contrary to previous records, it has been found the species occurs only in Upper Muschelkalk sediments. On the basis of known evidence, it seems that E. cf. liliiformis migrated east to west through the reactivated East-Carpathian Gate
PL
Po raz pierwszy udokumentowano pewną obecność liliowca Encrinus cf. liliiformis w osadach górnego wapienia muszlowego (środkowy trias) Polski. W przeciwieństwie do poprzednich doniesień wykazano, że gatunek ten występuje jedynie w górnym wapieniu muszlowym. Szereg przesłanek świadczy o migracji E. cf. liliiformis ze wschodu na zachód przez reaktywowaną bramę wschodnio-karpacką
EN
Due to their poor fossilization potential, fully articulated ophiuroids are extremely rare in the fossil record. Therefore much of their evolutionary history is based on the study of isolated skeletal elements. In this paper the mass-occurrence and taphonomy of articulated ophiuroids from the Middle Triassic of Wojkowice, Upper Silesia [S. Poland] is described. The assemblages consist of monospecific and multiindividual beds with small ophiuroids Aspiduriella similis [Eck]. Among 134 analysed specimens, 86 % are partially disarticulated, without distal and middle parts of their arms. Nearly all specimens are preserved with their oral side turned up. The high percentage of articulated specimens embedded within thin, fine-grained layer underlied by biomicrites with a few crinoid ossicles, indicates rapid burial in the deeper part of the shelf, below the crinoids habitat, caused by high-energy [storm] event in a shallow part of the basin. Apart from palaeobiological merit, such obrution deposits, characteristic for many Konzentrat-Lagerstätten accumulations, are very useful in recognizing the sedimentary environment dynamics and in stratigraphic correlations.
EN
The ammonoid Beneckeia tenuis (Seebach) is recorded from the Rhaetian (Lower Anisian) of the Holy Cross Mountains. Three specimens were collected from a single rock layer that is typical of epicontinental sea deposition of the time.
PL
Opisano amonity Beneckeia tenuis (Seebach) z retu (dolny anizyk) Gór Świętokrzyskich. Charakteryzowana fauna obejmuje trzy okazy typowo epikontynentalnej formy Beneckeia tenuis, które pochodzą z jednej warstwy skalnej.
EN
The ophiuroid Aspiduriella sp. is recorded for the first time from the Upper Muschelkalk (Ceratites Beds), at Nietulisko, northern margin of the Holy Cross Mountains, central Poland.
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