Browsing Paläontologie, Geobiologie by Contributor "John N. A. Hooper"
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Non-lithistid fossil Demospongiae - origins of their palaeobiodiversity and highlights in history of preservation Reitner, Joachim; Wörheide, G. (Systema Porifera : a guide to the classification of sponges. Vol. 1: Introductions and Demospongiae, 2002)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, ...