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Eocene relatives of cod icefishes (Perciformes: Notothenioidei) from Seymour Island, Antarctica

Bieńkowska-Wasiluk M., Bonde N., Møller P. R., Gaździcki A.

Geological Quarterly

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2013

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Vol. 57, No. 4

567--582

EN

Fragmentary skull bones and vertebra from the Upper Eocene La Meseta Formation on Seymour (Marambio) Island, Antarctic Peninsula have been described as gadiform fishes, informally named “Mesetaichthys”. Here we describe jaws as Mesetaichthys jerzmanskae n. g. and n. sp., and refer this taxon to the perciform suborder Notothenioidei. This group is almost unknown as fossils. Similarities to the living, ‘primitive’ nototheniid Dissostichus eleginoides are indicated in the dentition. Gadiform evolution in the Paleocene-Eocene, and the possibility of a correlation between the origin and evolution of notothenioids in connection with the deterioration of the climate in Antarctica during the Late Eocene-Oligocene is discussed.

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Fatrzańska przynależność utworów retyku w profilu "Nad Moreną" (rejon Przysłopu Miętusiego) : korekta stratygrafii hronikum w Tatrach

Gaździcki A., Uchman A.

Przegląd Geologiczny

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2012

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Vol. 60, nr 6

333-340

EN

The "Nad Moreną" section (Triassic–Jurassic boundary interval) in the Tatra Mts. was previously ascribed to the Choč Nappe (Hronicum domain) or to the Križna Nappe (Fatricum domain). Microfacies analysis of the Rhaetian limestones proves that they belong to the Fatra Formation, particularly because of the fossil biota assemblages. This study definitely proves the Križna (Fatricum) provenance of the "Nad Moreną" section and corrects stratigraphy of the Choč Nappe (Hronicum domain) in the Tatra Mts.

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Ekosystemy kenozoiku Antarktyki Zachodniej

Gaździcki A.

Przegląd Geologiczny

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2010

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Vol. 58, nr 2

120-123

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Rhaetian/Hettangian palynomorphs of the Tatra Mountains (West Carpathians)

Gaździcki A., Waksmundzka M., Hołda-Michalska A.

Volumina Jurassica

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2006

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Vol. 4, no. 1

280-281

EN

The uppermost Triassic and the lowermost Jurassic clastic-carbonate strata of the Sub-Tatric (Kriżna) unit of the Polish Tatra Mountains yield an important assemblage of microfossils - mostly foraminifers and also palynomorphs. The three representative Triassic/Jurassic boundary sections of the Kriżna unit (Lejowa Valley, Strążyska Valley and Mt. Mały Kopieniec) have been studied and sampled in order to establish a stratigraphical succession of microfossils. The palynomorph assemblage (spores, pollen grains and dinoflagellate cysts) were found in the transitional beds of the Fatra Formation (Rhaetian) and the basal clastics of the Kopieniec Formation [Hettangian-Sinemurian(?)] - Fig. 1. The assemblage contains 58 spore and pollen species and is dominated by pteridophyte spores (Dictyoniaceae and Matoniaceae). The biostratigraphically significant taxa: Concavisporites, Dictyophyllidites and Leptolepidites, indicate Rhaetian/Hettangian time interval (Fig. 1) - see Zavattieri, Batten (1996). The facies development and floral and faunal assemblages of the Triassic/Jurassic boundary sequence in the Kriżna unit are characteristic for the shallow-marine sedimentary environment (shoreface-offshore). The data presented support the earlier views (Goetel 1917; Gaździcki 2003) that the environmental conditions prevailing in the Tethys realm were quite similar to those in the epicontinental basin of the northwestern Europe during the Early Liassic times.

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Conodonts and foraminifera from the "Raibl Beds" (Carnian) of the Karavanke Mountains, Slovenia : stratigraphical and palaeobiological implications

Kolar-Jurkovšek T., Jurkovšek B., Gaździcki A.

Geological Quarterly

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2005

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Vol. 49, No. 4

429-438

EN

Themicropalaeontology of the "Raibl Beds" of the Košuta Nappe in the western KaravankeMts., Slovenia, is described. The presence of the conodont apparatus of Nicoraella? budaensis Kozur and Mock is demonstrated and together with other fossils it confirms a Carnian age. A comparison of the Nicoraella skeletal apparatus with two other Triassic apparatuses is made. The benthic foraminifera Aulotortus sinuosus, A. tumidus, Prorakusia salaji, Pilamminella kuthani and Endothyra kuepperi are recognized. Their stratigraphical range corresponds to the foraminiferal Pilamminella kuthani Interval-Zone. Altogether the palaeontological content of an 85 m-thick section in the upper part of the "Raibl Beds" below Mt. Jepca is described. The diverse fossil content of this section contributes to the intercalibration of Upper Triassic conodont, foraminifer and dasyclad zonations.

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A new limid bivalve from the La Meseta Formation (Eocene) of Seymour Island, Antarctic Peninsula

Stilwell J., Gaździcki A.

Acta Geologica Polonica

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1998

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Vol. 48, no. 2

149-155

EN

Several specimens of an unusual limid bivalve were collected recently from basal transgressive facies (Telm 1) of the Eocene La Meseta Formation, Seymour (Marambio) Island, Antarctic Peninsula. This bivalve represents a new subgenus and species, described herein as Acesta (Antarcticesta) laticosa subgen. et sp. n. Acesta (Acesta) bibbyi STILWELL & ZINSMEISTER, 1992, and Acesta (Antarcticesta) laticosta subgen. et sp. n. are the only limid bivalves recorded from the Eocene of Antarctica, but the history of the family in Antarctica extends from Cretaceous to Recent. Acesta (Antarcticesta) subgen. n. is monotypic and endemic to Antarctica with no known close relative.