Record details

Title
    Eostangeria ruziciniana (Zamiaceae) from the Middle Miocene of Bulgaria and its relationship to similar taxa of fossil Eostangeria, and extant Chigua and Stangeria (Cycadales).
Statement of responsibility
    Krassimira Uzunova, Emanuel Palamarev, Zlatko Kvaček
Author
    Kvaček, Zlatko, 1937-
    Palamarev, Emanuel
    Uzunova, Krassimira
Language
    anglicky
Source title - serial
    Acta palaeobotanica
Vol./nr.
    Vol. 41, no. 2
Pages
    p. 177-193
Year
    2001
Notes
    1 obr., 2 tab., 4 pl., 18 bibl.
    il.
    Zkr. název ser.: Acta palaeobot. (Kraków)
Subject group
    anatomie
    Cycadales
    Gymnospermophyta
    listy
    miocén-střední
    paleoekologie
    terciér
Geographical name
    Bulharsko
Keyword
    Bulgaria
    Chigua
    Cycadales
    Eostangeria
    Extant
    Fossil
    Middle
    Miocene
    Relationship
    Ruziciniana
    Similar
    Stangeria
    Taxa
    Zamiaceae
Abstract (in english)
   Characterisation of Eostangeria ruzinciniana (Palamarev, Petkova a Uzunova) Palamarev a Uzunova (Middle Miocene - Volhynian, Bulgaria) is augmented. The species is compared with morphologically similar cycads: E. saxonica Barthel (Eocene of Germany), E. pseudopteris Z. Kvaček a Manchester (Late Palaeocene and Eocene of estern USA), and the extant Chigua D. Stevenson and Stangeria T. Moore. Leaf epidermal anatomy indicates that E. ruzinciniana is closely related to other members of Eostangeria, forming with them a natural unit. Eostangeria slightly differs from Chigua (Zamioideae) in the presence of short dark-staining cells in the lower epidermis, densely toothed margins, and in the case of Eostangeria ruzinciniana by obviously persistent, non-articulated leaflets.
   In morphological features of the leaflets, Eostangeria resembles Stangeria (Stangeriaceae); however, the latter decidedly differs in entirely cyclocytic stomata lacking ventral lignified lamellae, coarsely striated epidermis with strongly undulate anticlines and an absence of short dark-staining cells. A new subfamily Eostangerioideae is suggested to accommodate Eostangeria within Zamiaceae
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    2. 10. 2007
Import date
    8. 8. 2012