Skip to content Skip to navigation

Article: Spicule pseudomorphs in a new Palaeozoic chaetetid, and its sclerosponge affinities

Publication: Palaeontology
Volume: 23
Part: 4
Publication Date: December 1980
Page(s): 803 820
Author(s): David I. Gray
Addition Information

How to Cite

GRAY, D. I. 1980. Spicule pseudomorphs in a new Palaeozoic chaetetid, and its sclerosponge affinities. Palaeontology23, 4, 803–820.

Online Version Hosted By

The Palaeontological Association (Free Access)


A Palaeozoic chaetetid, bearing intramural spicule pseudomorphs. Chaetets (Boswellia) mortoni sp. nov.. is described from the British Dinantian. Spicules are preserved as calcite, pyrite, and silica pseudomorphs. Only silica pseudomorphs retain detail of their tylostyle form. Neomorphism locally obliterates the spicular fabric. A primary mineralogy is suggested consisting of an aragonitic calcareous skeleton, with entrapped opal 'A' spicules. Comparison of morphology and microstructure with extant and fossil sclerospongcs indicales a close relationship between this chaetetid and the Ceratoporellida. and supports the sclerosponge nature of some Palaeozoic chaetetids.
PalAss Go! URL: | Twitter: Share on Twitter | Facebook: Share on Facebook | Google+: Share on Google+