Podrobnosti záznamu

Název
    Dioonopsis Horiuchi et Kimura leaves from the Eocene of western North America: a Cycad shared with the Paleogene of Japan
Autor
    Erdei, Boglarka
    Kvaček, Zlatko
    Manchester, Steven R.
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    International Journal of Plant Sciences
Svazek/č.
    Roč. 173, č. 1
Strany
    15
Rok
    2012
Výraz tezauru
    cycad
    Dioonopsis
    Eocene
    foliage
    North America
    paleobotany
    phytogeography
Klíčové slovo
    America
    Cycad
    Dioonopsis
    Eocene
    Horiuchi
    Japan
    Kimura
    Leaves
    North
    Paleogene
    Shared
    Western
Abstrakt (anglicky)
   Reinvestigation of cycadalean leaf and leaflet remains from the Eocene of Hamilton Bay, Alaska, and La Porte, California, using features of epidermal anatomy as well as macromorphology, indicates that these remains, which were formerly assigned to modern cycad genera, conform to the extinct genus Dioonopsis Horiuchi et Kimura first described from the Paleocene of Japan. Recognition of Dioonopsis praespinulosa (Hollick) Erdei, Manchester et Kvacek comb. nov. from Alaska and Dioonopsis macrophylla (Potbury) Erdei, Manchester et Kvacek comb. et stat. nov. from California supports the existence of the Dioonopsis lineage in North America during the early Cenozoic. The occurrence of this genus in the Eocene of western North America as well as Japan, combined with its apparent absence in the European Tertiary, indicates that it probably spread via the Beringial phytogeographic pathway and was thus adapted to occupy high-latitude environments. Among modern cycad genera, Dioon fits best to the
   macro- and micromorphology of Dioonopsis and may be a remnant of a lineage closely related to that of Dioonopsis.
Přispěvatel
    UK Praha, Přírodovědecká fakulta
Kód přispěvatele
    UK, PřF
Zdrojový formát
    R
Datum importu
    27. 4. 2014