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A spinose appendage fragment of a problematic arthropod from the Early Ordovician of Morocco

(2006) ACTA PALAEONTOLOGICA POLONICA. 51(2). p.239-246
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Abstract
A highly spinose fragment of a possibly raptorial appendage from the Arenig (Early Ordovician) of the Upper Fezouata Formation north of Zagora, southeastern Morocco is described as the arthropod Pseudoangustidontus duplospineus gen. et sp. nov. The single fragmentary specimen displays a unique morphology, carrying at least 39 pairs of spines (i.e., 78 spines) of very regularly alternating lengths. Pseudoangustidontus gen. nov. shows some similarities to a number of spinose arthropod appendages and appendage parts, most notably to the spine-bearing podomeres of the third prosomal appendage of megalograptid eurypterids and the problematic and incompletely known genus Angustidon tits. However, megalograptids and Angustidontus both have a lower spine count, while the latter also carries only a single row of spines. Because no known arthropod displays a morphology closely comparable to that of Pseudoangustidontus gen. nov., the affinities of the new fossil within Arthropoda remain uncertain.
Keywords
Morocco, Arthropoda, EURYPTERIDA, raptorial appendage, Arenig, Ordovician

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Citation

Please use this url to cite or link to this publication:

MLA
Van Roy, Peter, and Odd Erik Tetlie. “A Spinose Appendage Fragment of a Problematic Arthropod from the Early Ordovician of Morocco.” ACTA PALAEONTOLOGICA POLONICA, vol. 51, no. 2, 2006, pp. 239–46.
APA
Van Roy, P., & Tetlie, O. E. (2006). A spinose appendage fragment of a problematic arthropod from the Early Ordovician of Morocco. ACTA PALAEONTOLOGICA POLONICA, 51(2), 239–246.
Chicago author-date
Van Roy, Peter, and Odd Erik Tetlie. 2006. “A Spinose Appendage Fragment of a Problematic Arthropod from the Early Ordovician of Morocco.” ACTA PALAEONTOLOGICA POLONICA 51 (2): 239–46.
Chicago author-date (all authors)
Van Roy, Peter, and Odd Erik Tetlie. 2006. “A Spinose Appendage Fragment of a Problematic Arthropod from the Early Ordovician of Morocco.” ACTA PALAEONTOLOGICA POLONICA 51 (2): 239–246.
Vancouver
1.
Van Roy P, Tetlie OE. A spinose appendage fragment of a problematic arthropod from the Early Ordovician of Morocco. ACTA PALAEONTOLOGICA POLONICA. 2006;51(2):239–46.
IEEE
[1]
P. Van Roy and O. E. Tetlie, “A spinose appendage fragment of a problematic arthropod from the Early Ordovician of Morocco,” ACTA PALAEONTOLOGICA POLONICA, vol. 51, no. 2, pp. 239–246, 2006.
@article{347096,
  abstract     = {A highly spinose fragment of a possibly raptorial appendage from the Arenig (Early Ordovician) of the Upper Fezouata Formation north of Zagora, southeastern Morocco is described as the arthropod Pseudoangustidontus duplospineus gen. et sp. nov. The single fragmentary specimen displays a unique morphology, carrying at least 39 pairs of spines (i.e., 78 spines) of very regularly alternating lengths. Pseudoangustidontus gen. nov. shows some similarities to a number of spinose arthropod appendages and appendage parts, most notably to the spine-bearing podomeres of the third prosomal appendage of megalograptid eurypterids and the problematic and incompletely known genus Angustidon tits. However, megalograptids and Angustidontus both have a lower spine count, while the latter also carries only a single row of spines. Because no known arthropod displays a morphology closely comparable to that of Pseudoangustidontus gen. nov., the affinities of the new fossil within Arthropoda remain uncertain.},
  author       = {Van Roy, Peter and Tetlie, Odd Erik},
  issn         = {0567-7920},
  journal      = {ACTA PALAEONTOLOGICA POLONICA},
  keywords     = {Morocco,Arthropoda,EURYPTERIDA,raptorial appendage,Arenig,Ordovician},
  language     = {eng},
  number       = {2},
  pages        = {239--246},
  title        = {A spinose appendage fragment of a problematic arthropod from the Early Ordovician of Morocco},
  url          = {http://www.app.pan.pl/article/item/app51-239.html},
  volume       = {51},
  year         = {2006},
}

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