Paläontologische Zeitschrift

, 66:297 | Cite as

The proximal development in anisograptids (Graptoloidea, Anisograptidae)

  • Jörg Maletz


A model for the proximal development of anisograptids is proposed. The complex proximal development types of tri- and quadriradiate rhabdosomes are constructed by repetition of simple isograptid branching. The simple structures involved in the proximal developments indicate possibly a polyphyletic origin of biradiate graptolites.


Ordovician Dorsal Margin Proximal Development Lateral Origin MITC 
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Ein Modell zur Erklärung der Proximalstrukturen der Anisograpten wird vorgestellt. Die komplex erscheinenden Proximalstrukturen der bi-, tri- und quadriradiaten Rhabdosome werden durch die Wiederholung einer einfachen Grundregel, der isograptiden Verzweigung, hergestellt. Diese Struktur könnte einen polyphyletischen Ursprung der biradiaten Graptolithen andeuten.


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Copyright information

© E. Schweizerbart’sche Verlagsbuchhandlung 1992

Authors and Affiliations

  • Jörg Maletz
    • 1
  1. 1.Institut für Geologie und PaläontologieTechnische Universität BerlinBerlin10Germany

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