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Ciliated urns in Archaster typicus Müller and Troschel, 1840 (Echinodermata, Asteroidea, Archasteridae): present and future research
Janssen, H.H.; Vandenspiegel, D. (1996). Ciliated urns in Archaster typicus Müller and Troschel, 1840 (Echinodermata, Asteroidea, Archasteridae): present and future research. Philipp. Sci. 33: 94-103
In: Philippine Scientist. University of San Carlos: Cebu City. ISSN 0079-1466
Peer reviewed article  

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Trefwoorden
    Morphology (animal); Archaster typicus Müller & Troschel, 1840 [WoRMS]; Marien

Auteurs  Top 
  • Janssen, H.H.
  • Vandenspiegel, D.

Abstract
    The presence of ciliated urns is known since long from the apodid, or synaptid, Holothuroidea (sea cucumbers). Similar, but more primitive organs have been reported from the sea-star Archaster typicus Miiller and Troschel 1840 in an earlier paper. The Archasteridae is the second echinoderm taxon in which such organs have been discovered. The presence of comparable urn organs of coelothelial origin in two different taxa which are definitely not related is shedding new light on the phylogenetic development of these organs as well as on their function, which is far from being understood. As an interim report on the status of our work we compare the urns in both echinoderm taxa, derive hypotheses and discuss them as a background for future investigations.

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