Record details

Title
    New data and revision of three gymnosperms from the Cenomanian of Bohemia - Sagenopteris variabilis (Velenovský) Velenovský, Mesenea bohemica (Corda) comb. n. and Eretmophylum obtusum (Velenovský) comb.n.
Statement of responsibility
    Jiří Kvaček
Author
    Kvaček, Jiří, 1937-
Language
    anglicky
Source title - serial
    Sborník Národního muzea v Praze. Řada B, Přírodní vědy
Vol./nr.
    Roč. 55, č. 1-2
Pages
    s. 15-24
Year
    1999
Notes
    1 tab., 10 pl., 3 s.bibl.
    il.
    Zkr. název ser.: Sbor. Nár. Muz. (Praha), Ř. B.
Subject group
    analýza kutikulární
    cenoman
    česká křídová pánev
    Gymnospermophyta
    křída-svrchní
    popis taxonů
    revize
Geographical name
    ČR-Čechy
    Horoušany (Praha-východ)
    Mšené-lázně(Litoměřice)
    Nehvizdy (Praha-východ)
    Pecínov (Rakovník)
Keyword
    Bohemia
    Bohemica
    Cenomanian
    Comb
    Comb.n
    Corda
    Data
    Eretmophylum
    Gymnosperms
    Mesenea
    New
    Obtusum
    Revision
    Sagenopteris
    Three
    Variabilis
    Velenovský
Abstract (in english)
   New data from cuticular analysis are provided for three fossil plant taxa from the Cenomanian of Bohemia. Sagenopteris variabilis (VELENOVSKÝ) VELENOVSKÝ is newly revised and its comparison with S. mantelli is discussed. Leaves of S. variabilis are peltate, consisting of 3-(?5) lanceolate pinnae with reticulate venation. The new genus mesenea is compared with similar Mesozoic genera Almargemia FLORIN, Ticoa ARCHANGELSKY and Ctenozamites NATHORST. The species Mesenea bohemica (CORDA in REUSS) comb.n., newly recorded from several Bohemian Cenomanian localities, is compared with Kirchnera arctica Heer and considered to be of cycadalean affinity. The tripinnate fronds consist of entire-margined or loosely dentate pinnae with odontopteroid venation. Its cuticle shows typical characters of cycads including haplocheilic stomata and small thick-walled cells. The ginkgoalean leaf Eretmophyllum obtusum (VELENOVSKÝ) comb. n.
   is synonymized with Nehvizdya obtusa (VELENOVSKÝ) HLUŠTÍK and Podozamites obtusus VELENOVSKÝ. Its relationship with E. andegavense is discussed. It shows obtuse entire-margined leaves with typically forking venation and extremely thick cuticle
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    28. 3. 2008
Import date
    8. 8. 2012