Silica spicules and axial filaments of the marine sponge Stelletta grubii (Porifera, Demospongiae)

@article{Simpson2004SilicaSA,
  title={Silica spicules and axial filaments of the marine sponge Stelletta grubii (Porifera, Demospongiae)},
  author={Tracy L. Simpson and P. F. Langenbruch and Lidia Scalera-Liaci},
  journal={Zoomorphology},
  year={2004},
  volume={105},
  pages={375-382}
}
SummaryIn all cases an organic axial filament within the silica spicules of Stelletta grubii forms the core of the major axes of the glass. In the small, star-shaped silica spicules (asters) the filament is shown for the first time to be radial with an enlarged center; in the large four-rayed spicules (triaenes) it is four-rayed; and in the large single-rayed spicules (oxeas) the filament is single-rayed. In situ, the filament is not dissolved by boiling nitric acid and thus is apparently… 

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