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Proetide trilobites from the Cystoid Limestone (Ashgill) of NW Spain, and the suprageneric classification of related forms

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Kurzfassung

Nur wenige Trilobiten der Ordnung Proetida wurden bisher aus der ordovizischen»Selenopeltis Provinz« gemeldet. Im folgenden werden vier Arten aus dem Cystoideen-Kalk, Ashgill, der östlichen Iberischen Ketten NW-Spaniens beschrieben und den GattungenRadnoria, Harpidella, Panar- chaeogonus undRorringtonia zugerechnet. Zwei Arten,Radnoria carlsi undRorringtonia lenis, sind neu, die übrigen Arten werden in offener Nomenklatur belassen. Im Anhang wird die Klassifikation der|enigen Proetida besprochen, die zu den Aulacopleuridae, Brachymetopidae und der neuen Familie Rorringtoniidae gehören. Sie alle werden in die Superfamilie Aulacopleuracea gestellt.

Abstract

Few trilobites of the Order Proetida have been reported from the Ordovician»Selenopeltis Province«. Herein four species from the Ashgill Cystoid Limestone of the eastern Iberian Chains, NW Spain, are described and assigned to the generaRadnoria, Harpidella, Panarchaeogonus andRorringtonia. Two species,Radnoria carlsi andRorringtonia lenis, are new, and the others are described under open nomenclature. In the appendix, classification of Proetida belonging to the Aulacopleuridae, Brachymetopidae and the new family Rorringtoniidae is discussed, and all are included in the superfamily Aulacopleuracea.

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Correspondence to Robert M. Owens or Wolfgang Hammann.

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Owens, R.M., Hammann, W. Proetide trilobites from the Cystoid Limestone (Ashgill) of NW Spain, and the suprageneric classification of related forms. Paläontol. Z. 64, 221 (1990). https://doi.org/10.1007/BF02985716

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Keywords

  • Ordovician
  • Thoracic Segment
  • Internal Mould
  • Palpebral Lobe
  • Border Furrow