Wyniki wyszukiwania

1

Isotope age constraint for the Blue Dyke and Jardine Peak subvertical instrusions of King George Island, West Antarctica

100%

Panczyk M., Nawrocki J., Williams I. S.

Polish Polar Research

|

2009

|

tom 30

|

nr 4

379-391

2

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Entelodon orientalis n.sp. (Suiformes) from the Oligocene of the Gobi Desert, Mongolia

100%

Dashzeveg D.

Acta Palaeontologica Polonica

|

1965

|

tom 10

|

nr 2

Two fragments of upper jaws of the genus Entelodon, found in the Oligocene of Khoer-Dzan near Dzamyn-Ude, Eastern Gobi Desert, are described. They are attributed to the new species, Entelodon orientalis n.sp.

3

Brachiopods from the Chlamys Ledge Member [Polonez Cove Formation, Oligocene] of King George Island, West Antarctica

100%

Bitner M. A., Gazdzicki A., Blazejowski B.

Polish Polar Research

|

2009

|

tom 30

|

nr 3

277-290

4

The Oligocene Tipulomorpha [Diptera] from Bolshaya Svetlovodnaya [Eastern Asia, Russia]

100%

Krzeminski W.

Polskie Pismo Entomologiczne

|

2000

|

tom 69

|

nr 2

5

Morphological variability of the Paratethyan Oligocene–Miocene small reticulofenestrid coccolites and its paleoecological and paleogeographical implications

84%

Holcova K.

Acta Palaeontologica Polonica

|

2013

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tom 58

|

nr 3

The analysis of size changes (length of placoliths, their width, length of central opening and its width) in elliptical reticulofenestrids from the NP25–NN5 zonal interval of the Central Paratethys allowed to dicriminate two size categories of placoliths: (i) small Reticulofenestra minuta (< 3.5 μm); (ii) Reticulofenestra haqii–pseudoumbilicus group (4–10.0 μm). The latter group appeared for the first time (FO, first occurrence) in the upper Egerian (size 4–7 μm) with the size of placoliths in this plexus increasing gradually. The FO of R. pseudoumbilicus > 8.0 μm has been established in the Zone NN2 while its FCO (first common occurrence) in the Zone NN5. This study shows that the FOs of size−defined morphotypes of the R. haqii–pseudoumbilicus group differ in the Central Paratethys and oceanic realm. Blooms of R. minuta at the Oligocene–Miocene boundary and in the Early Middle Miocene may be correlated with the incoming of warm water into the higher latitude Central Paratethys basins during connection with the Mediterranean Sea. Transgression favored the expansion of near−shore areas associated probably by some short−time oscillations of salinity. The FO of R. haqii–pseudoumbilicus group and the FO of R. pseudoumbilicus > 8.0 μm can be correlated with the opening of new pathways between the Mediterranean and the Central Paratethys. Gradual size changes in the R. haqii–pseudoumbilicus group probably reflect climatic changes: the decrease of coccolith size in the late Egerian may reflect cooling (Mi1 event) while the increase in coccolith size in the interval from the FO of Helicosphaera ampliaperta to the FO of Sphenolithus heteromorphus occurred due to warming. Two size categories of placoliths in the R. haqii–pseudoumbilicus group (3.5–6 μm and 6–8 μm) recorded in the interval from Zone NN1 to the lower part of the Zone NN2 may represent seasonal populations.

6

Late Oligocene sharks and rays from the Chandler Bridge Formation, Dorchester County, South Carolina, USA

84%

Cicimurri D. J., Knight J. L.

Acta Palaeontologica Polonica

|

2009

|

tom 54

|

nr 4

A diverse vertebrate fauna, dominated by elasmobranch taxa, was collected from the upper Oligocene (Chattian) Chandler Bridge Formation in Summerville, Dorchester County, South Carolina. Nearly 3,500 teeth and dermal denticles are assigned to 29 species of sharks and rays, and our sample includes the oldest known occurrence of the whale shark, Rhincodon, as well as a new skate, Raja mccollumi sp. nov. The Chandler Bridge elasmobranch assemblage is comparable in species diversity to Chattian assemblages of Virginia and North Carolina, USA, and Germany. Notable absences from Germany include Rhincodon, Hemipristis, and Sphyrna zygaena, likely reflecting the influence of colder water on the North Sea Basin during the Chattian. Squaloids, pristiophoroids, and hexanchoids are known from Chattian deposits of the Albemarle Embayment (North Carolina), Salisbury Embayment (Virginia), and North Sea Basin, but these taxa are absent from the Chandler Bridge assemblage, perhaps because of shallow, warm water (20 to 25°C) conditions within the more southerly Charleston Embayment.

7

Dwarfism and feeding behaviours in Oligo-Miocene crocodiles from Riversleigh, northwestern Queensland, Australia

84%

Stein M., Archer M., Hand S. J.

Acta Palaeontologica Polonica

|

2016

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tom 61

|

nr 1

Instances of dwarfism in the fossil record are of interest to palaeontologists because they often provide insight into aspects of palaeoecology. Fossil species of Australian-Pacific mekosuchine genus Mekosuchus have been described as dwarf, primarily terrestrial crocodiles, in contrast with the nearly ubiquitous semi-aquatic habitus of extant crocodilians (Willis 1997). This hypothesis has been difficult to test because of limited knowledge of the cranial and postcranial skeleton of extinct taxa and the continuous nature of crocodilian growth. New crocodilian vertebral material from Riversleigh, northwestern Queensland, tentatively referred to Mekosuchus whitehunterensis, displays morphological maturity indicative of adult snout-vent length little over a half-meter, proportionally smaller than extant dwarf taxa. Further, this material displays morphology that indicates a relatively large epaxial neck musculature for its body-size. These attributes suggest this dwarf mekosuchine employed unusual feeding behaviours. The ability to perform normal death-roll, de-fleshing behaviours would be limited in a mekosuchine of such small size. Given the powerful neck muscles and other anatomical features, it is more likely that this mekosuchine killed and/or dismembered its prey using a relatively forceful lifting and shaking of the head.

8

A columbid-like avian foot from the Oligocene of Poland

84%

Bochenski Z. M., Tomek T., Swidnicka E.

Acta Ornithologica

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2010

|

tom 45

|

nr 2

9

A new genus of chemosymbiotic vesicomyid bivalves from the Oligocene of western North America

84%

Hybertsen F., Goedert J. L., Kiel S.

Acta Palaeontologica Polonica

|

2022

|

tom 67

|

nr 3

10

Tonacatecutlius gibsoni gen. and sp.nov. from the Oligocene-Miocene Mexican amber [Hemiptera: Fulgoromorpha: Nogodinidae]

84%

Stroinski A., Szwedo J.

Annales Zoologici

|

2000

|

tom 50

|

nr 3

Tonacatecutlius gibsoni gen. and sp. nov. - the first representative of the planthopper family Nogodinidae, and placed in the subtribe Nogodinina, from the Oligocene/Miocene fossil resin of Mexico is described.

11

A revision of fossil Megistocera and Brachypremna [Diptera: Tipulidae]

84%

Krzeminski W.

Polskie Pismo Entomologiczne

|

1996

|

tom 65

|

nr 3-4

12

Larval development in Oligocene palaeobatrachid frogs

84%

Rocek Z.

Acta Palaeontologica Polonica

|

2003

|

tom 48

|

nr 4

A detailed account of the development of skeletal and some soft−tissue structures is based on 171 fossil tadpoles and metamorphosing froglets of Palaeobatrachus sp. from the Late Oligocene of the Czech Republic (locality Bechlejovice). Their exceptionally good preservation resulted from fossilization in diatomites. The fossil developmental series was compared with normal development of the contemporary anuran Xenopus laevis (Pipidae) represented by cleared and stained (alizarin/toluidin−blue) whole−mount specimens. The comparison revealed that in spite of differences in the sequence of ossification and its timing (e.g., ossification of the otic capsules and ribs was retarded in Xenopus whereas dermal ossification was retarded in Palaeobatrachus), in the number of free ribs, and in composition of the sacral region (the synsacrum in Palaeobatrachus involves two posterior presacrals, whereas there is a single sacral in Xenopus), both genera were similar in great number of anatomical features that appear during development. The most important difference is the shape of vertebral centrum (procoelous in Palaeobatrachus, opisthocoelous in all Pipidae) which is formed in comparatively early developmental stages. A view that could result from anatomical comparisons is that Palaeobatrachus could be derived from the Pipidae, but this is doubtful due to biostratigraphic and palaeogeographic discrepancies. The earliest palaeobatrachids were recorded from the Late Cretaceous of Europe but pipids could not invade northern continents after the Early Cretaceous when the Tethys Sea prevented interchanges of anuran faunas. Also, all palaeobatrachids retain primitive anatomical features (e.g., five pairs of ribs) that were more derived even in the earliest pipids from the Lower Cretaceous of Israel.

13

A detailed description of Caspiodontornis kobystanicus from the Oligocene of the Caspian seashore

84%

Aslanova S. M., Burchak-Abramovich N. I.

Acta Zoologica Cracoviensia

|

1999

|

tom 42

|

nr 3

14

The rotaliid foraminiferan Escornebovina identified in the Carpathian Paleocene

84%

Szczechura J.

Acta Palaeontologica Polonica

|

1992

|

tom 37

|

nr 1

15

Reconstruction of Oligocene and Neogene freshwater fish faunas - an actualistic study on cypriniform otoliths

84%

Schulz-Mirbach T., Reichenbacher B.

Acta Palaeontologica Polonica

|

2006

|

tom 51

|

nr 2

Fossil utricular otoliths (= lapilli) from cypriniform fishes have long been recorded from European Oligocene and Neogene freshwater and oligohaline sediments. Until now, their determination was limited to the family level owing to the lack of morphological investigations on lapilli of Recent cypriniforms. The present study introduces a terminology for the lapillus morphology that is based on the lapilli of 134 specimens of 20 cyprinid and one balitorid species. It is demonstrated that the lapillus has valuable characters for taxonomic classification. As a result, fossil lapilli from Oligocene and Miocene continental deposits from the western Mediterranean, the Swiss and the South German Molasse Basin, the Mainz Basin, and additionally from Anatolia could be determined. Nine species were identified: aff. Abramis sp. vel aff. Alburnus sp., aff. Alburnoides sp., aff. Barbus sp., cf. Leuciscussp., Palaeoleuciscus sp., Palaeotinca moeddeni sp. nov., Palaeotinca sp. 1, aff. Phoxinus sp., and aff. Rutilus sp. vel aff. Scardinius sp. Our study includes the oldest record of a Phoxinus−related and a Palaeotinca species from Europe. Additionally, aff. Abramis sp. vel aff. Alburnus sp. and aff. Alburnoides have been identified as fossils for the first time. The determination of the fossil lapilli has been supported by means of pharyngeal teeth, with the exception of aff. Abramis sp. vel aff. Alburnus sp., whose lapilli were found together with pharyngeal teeth of Palaeocarassius sp. It is suggested that these so−called Palaeocarassius pharyngeal teeth do not belong to an ancestor of the Carassiuslineage, but to a forerunner of the Abramis or Alburnuslineage. Our results support the previously described turnover in the Paratethys freshwater fish fauna about 17–18 Ma ago, when Palaeotinca spp. became extinct and the first appearance of Palaeoleuciscussp. and Palaeocarassiussp. (= aff. Abramissp. vel aff. Alburnus sp.) occurred. The Oligocene and Miocene cypriniform fishes did not evolve any provincialism from southern France throughout the Molasse Basin to the Mainz Basin.

16

Dinoflagellate cysts from the Ostrysz Formation [Oligocene Flysch, Polish Inner Carpathians], their age and palaeoecology

84%

Gedl P.

Bulletin of the Polish Academy of Sciences. Earth Sciences

|

1995

|

tom 43

|

nr 2

17

Patterns of larval development in Cretaceous pipid frogs

84%

Rocek Z., Van Dijk E.

Acta Palaeontologica Polonica

|

2006

|

tom 51

|

nr 1

A developmental series of nearly 250 tadpoles of Shomronella jordanica from the Early Cretaceous (Hauterivian) of the Shomron (Samaria) region of central Israel, a small collection (12) of Thoraciliacus rostriceps tadpoles from the Early Cretaceous (Aptian) of Makhtesh Ramon, Israel, and 13 tadpoles from the Late Cretaceous (Campanian/Maastrichtian boundary) of Stompoor, Marydale, South Africa were studied. These were compared with published data on the development of Paleogene (Middle Eocene–Early Oligocene) pipids from Patagonia, and with normal development of the contemporary pipid frog Xenopus. The comparisons of the developmental series of the Cretaceous and contemporary pipid frogs provided data on changes in the developmental pattern, namely of the degree of ossification and other developmental events. In general, it seems that ossification has become considerably delayed in the course of pipid evolution, whereas most anatomical features typical for free living pipid larvae were well established as early as in the Early Cretaceous. Comparisons with the developmental series of specimens from the Late Oligocene Palaeobatrachidae (closely related to the Pipidae) from Bechlejovice near Děčín, Czech Republic revealed that some morphological differences between the two families might be explained by their developmental mode (e.g., formation of the opisthocoelous vertebral centrum in Shomronella). The uncinate process on three anterior pairs of ribs in Shomronella is the character retained in primitive anurans, and indicates close phylogenetic relations of early pipoids to discoglossoids.

18

A new heterosoricid shrew from the lowermost Oligocene of Europe

84%

Smith R., Van Den Hoek Ostende L. W.

Acta Palaeontologica Polonica

|

2006

|

tom 51

|

nr 2

The earliest Oligocene faunas of Europe are characterised by a large number of Asian immigrants. One of the classical sites that shows the faunal change after this so−called “Grande Coupure” is Hoogbutsel in Belgium (MP 21). Recently a new locality from the lowermost Oligocene was discovered in Belgium, Boutersem TGV. Here, we describe a new heterosoricid (Mammalia, Soricomorpha), Belgicasorex ramboeri gen. et sp. nov., from these lowermost Oligocene localities. We assume that, like the erinaceid Tetracus nanus Aymard, 1846 and the nyctitheriid Oligonyctia hoffmani Smith, 2004, Belgicasorex ramboeri was one of the Asian immigrants that entered Europe after the “Grande Coupure”.

19

New specimens of the earliest European passeriform bird

84%

Mayr G., Manegold A.

Acta Palaeontologica Polonica

|

2006

|

tom 51

|

nr 2

We describe new specimens of the oldest European passeriform bird from the early Oligocene of Germany. This bird has hitherto been known only from a poorly preserved skeleton and we report here a second slab of the same specimen and an additional fragmentary skull. The new specimens allow the description of a new species, Wieslochia weissi gen. et. sp. nov., which lacks apomorphies of crown group Oscines, the taxon including most extant and all European passeriform species. In overall osteology, Wieslochia most closely resembles extant Suboscines but these similarities may be plesiomorphic for Passeriformes. W. weissi differs from the stem species pattern hypothesized for Eupasseres in the morphology of the distal carpometacarpus, the absence of a hooked processus acrocoracoideus (coracoid), and the presence of furrows instead of certain canals on the hypotarsus, and may even be outside crown group Eupasseres, the clade including Oscines and Suboscines. Because the earliest European fossil record of oscine passerines is from the late Oligocene, passerines outside crown group Oscines may have colonized Europe before the arrival of Oscines from the Australian continental plate.

20

Echinoid burrow Bichordites monastiriensis from the Oligocene of NE Italy

67%

Bernardi M., Boschele S., Ferretti P., Avanzini M.

Acta Palaeontologica Polonica

|

2010

|

tom 55

|

nr 3

479-486

Several specimens of trace fossil Bichordites monastiriensis were discovered in two shallow water Oligocene sandstone beds from Valsugana (Trentino, NE Italy) representing the oldest documented occurrence for this ichnospecies. They are grazing−crawling (pascichnion−repichnion) structures and are occasionally associated with enlarged structures that can be interpreted as resting traces (cubichnia) and assigned to the ichnogenus Cardioichnus. The resulting Bichordites–Cardioichnus compound trace fossil is here described for the first time. In the basal part of some specimens, skeletal remains of Eupatagus ornatus were found in life position. This founding enables to widen the spectrum of known Bichordites tracemakers. Exceptional conditions of preservation of one specimen extending in two beds recording different environmental conditions gave an opportunity to document the effects of various taphonomical histories on the preservation of this traces.

Ograniczanie wyników

Isotope age constraint for the Blue Dyke and Jardine Peak subvertical instrusions of King George Island, West Antarctica

Entelodon orientalis n.sp. (Suiformes) from the Oligocene of the Gobi Desert, Mongolia

Brachiopods from the Chlamys Ledge Member [Polonez Cove Formation, Oligocene] of King George Island, West Antarctica

The Oligocene Tipulomorpha [Diptera] from Bolshaya Svetlovodnaya [Eastern Asia, Russia]

Morphological variability of the Paratethyan Oligocene–Miocene small reticulofenestrid coccolites and its paleoecological and paleogeographical implications

Late Oligocene sharks and rays from the Chandler Bridge Formation, Dorchester County, South Carolina, USA

Dwarfism and feeding behaviours in Oligo-Miocene crocodiles from Riversleigh, northwestern Queensland, Australia

A columbid-like avian foot from the Oligocene of Poland

A new genus of chemosymbiotic vesicomyid bivalves from the Oligocene of western North America

Tonacatecutlius gibsoni gen. and sp.nov. from the Oligocene-Miocene Mexican amber [Hemiptera: Fulgoromorpha: Nogodinidae]

A revision of fossil Megistocera and Brachypremna [Diptera: Tipulidae]

Larval development in Oligocene palaeobatrachid frogs

A detailed description of Caspiodontornis kobystanicus from the Oligocene of the Caspian seashore

The rotaliid foraminiferan Escornebovina identified in the Carpathian Paleocene

Reconstruction of Oligocene and Neogene freshwater fish faunas - an actualistic study on cypriniform otoliths

Dinoflagellate cysts from the Ostrysz Formation [Oligocene Flysch, Polish Inner Carpathians], their age and palaeoecology

Patterns of larval development in Cretaceous pipid frogs

A new heterosoricid shrew from the lowermost Oligocene of Europe

New specimens of the earliest European passeriform bird

Echinoid burrow Bichordites monastiriensis from the Oligocene of NE Italy