The Lower Jurassic flora from Odrowąż – state of investigations

• Autorzy: Barbacka M. , Ziaja J. , Wcisło-Luraniec E.
• Konferencja: International Congress on the Jurassic System (7 ; 06-18.09.2006 ; Kraków, Poland)
• Języki publikacji: EN

Abstrakty

EN

The Early Jurassic (Hettangian) fossil plants from the Mesozoic margin of the Holy Cross Mountains in Poland have been worked out for many years. First data regarding plant macrofossils from this area were published at the end of the XIX-th century by Raciborski (northern part of the Holy Cross Mts. margin) and later, at the beginning of the XX-th century by Makarewiczówna (neighbourhood of Ostrowiec). Later, Reymanówna continued studies on a newly discovered locality in Odrowąż (known also as Sołtyków). Because of relatively poor preservation of the material, it was not investigated methodically, and only some species were described. Wcisło-Luraniec prepared the taxonomical list of macroflora, while Ziaja researched palynology. Last years, dinosaur findings in this locality caused an increase of interest in the palaeoenvironment of Odrowąż, so that reconstruction of vegetation and plant descriptions became topical. The existing list of taxa contains: horsetails - Neocalamites sp.; ferns - Todites princeps (Presl) Gothan, Phlebopteris angustiloba (Presl) Hirmer & Horhammer, Thaumatopteris schenkii Nathorst; seed ferns - Caytonia sp., Pachypteris sp.; bennettites - Otozamites sp., Pterophyllum sp.; ginkgophytes - Schmeissneria microstachys (Presl) Kirchner & van Konijnenburg-van Cittert; conifers - Swedenborgia sp., Podozamites sp., and Hirmeriella muensteri (Schenk) Jung. Recently, it has increased with some species: horsetails - Equisetites sp.; ferns - Woodwardites microlobus Schenk, Dictyophyllum sp., Sphenopteris kirchneri Goeppert; and cycads - Paracycas cteis Harris. Also, some determinations were specified: Pachypteris lanceolata Brongniart, Otozamites brevifolius Braun, Podozamites lanceolatus (Lindley & Hutton) Braun, and a new species was proposed, Pterophyllum alinae. Sixty-three taxa of fossil pollen grains and spores from Odrowąż have been recognized by now. The Classopollis pollen grains were isolated from Hirmeriella muensteri (Schenk) Jung male cones. The pollen grains from these cones are identical as dispersed Classopollis torosus (Reissinger) Couper from Odrowąż. The microflora were compared with the macroflora from investigated locality. The major plant groups of the microflora correspond to plant groups represented in the macroflora. The age of sediments from Odrowąż has been established as Hettangian on the basis of spore and pollen grain composition and the presence of an index species Aratrisporites minimus Schulz. It confirms the earlier opinion on the age of these sediments based on geological and macrofloristical investigations.

Słowa kluczowe

EN

macroflora; spores; pollen grains; taxonomy; Lower Jurassic; Odrowąż; Poland

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Volumina Jurassica
• Rocznik: 2006
• Tom: Vol. 4, no. 1
• Strony: 229--229

Twórcy

autor

Barbacka M.

autor

Ziaja J.

autor

Wcisło-Luraniec E.

• Hungarian Natural History Museum, Botanical Department, H-1476 Budapest, Pf. 222, Hungary,