Zobrazeno 1 - 1
of 1
pro vyhledávání: '"Joshep P. Botting"'
Publikováno v:
Geological Society, London, Memoirs. 38:81-95
The Cambrian, Ordovician and Silurian distributions of non-stromatoporoid sponges are reviewed. The earliest Cambrian faunas contain mostly hexactinellids, with protomonaxonids dominating middle Cambrian assemblages. There are no obvious palaeobiogeo