Biostratigraphy and palaeogeography of Late Ordovician chitinozoans from the northeastern Alborz Range, Iran

Mohammed Ghavidel-syooki, Theresa Winchester-Seeto

    Research output: Contribution to journalArticle

    25 Citations (Scopus)

    Abstract

    Chitinozoans were extracted from Upper Ordovician strata in the northeastern Alborz Range (Kopet Dagh Region); 31 chitinozoan species are recorded. Four successive biozones are recognised within the Ghelli Formation, viz. Tanuchitina fistulosa, Acanthochitina barbata, Armoricochitina cf. nigerica and Ancyrochitina merga biozones. Correlation of these biozones with those of the North Gondwana Domain suggests that the middle and upper parts of the Ghelli Formation range from Late Caradoc to mid Ashgill. The number of species in common with the North Gondwana Domain suggests a close relationship between Iran and North Gondwana. However, there are a number of cosmopolitan species occurring in the Ashgill. Three new species are described: Armoricochitina alborzensis, Armoricochitina iranica and Ancyrochitina persica.

    Original languageEnglish
    Pages (from-to)77-99
    Number of pages23
    JournalReview of Palaeobotany and Palynology
    Volume118
    Issue number1-4
    DOIs
    Publication statusPublished - 2002

    Keywords

    • Biostratigraphy
    • Chitinozoa
    • Late Ordovician
    • North Gondwana
    • Palaeobiogeography

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