Publication Date:
2021-04-25
Description:
Available evidence suggests that the first demosponges occur in the Late Proterozoic, with forms characterized by bundles of long monaxonic
spicules. In the Middle Devonian the first modern forms of Dendroceratida, ‘axinellids’ (mostly halichondrids), and first haplosclerids
appeared. An important boundary for the demosponges is the Late Devonian extinction event, which caused a complete
overhaul of demosponge communities. The Late Permian and the Triassic, especially the Late Triassic, are the main eras for coralline
demosponge radiation and dominance, in which some modern taxa occur for the first time (Ceratoporella, Astrosclera, Vaceletia). In the
Late Jurassic the freshwater environments were occupied by certain (marine) demosponges, mostly Haplosclerida. The importance of
coralline demosponges as primary reef-builders decreases up to the Late Cretaceous.
Keywords:
551
;
VU 000
;
38.20
Language:
English
Type:
anthologyArticle
,
publishedVersion
Format:
52-68
Format:
application/pdf
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