|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
Morphology (animal); Archaster typicus Müller & Troschel, 1840 [WoRMS]; Marien
|Auteurs|| || Top |
- Janssen, H.H.
- Vandenspiegel, D.
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.