Archaeocyatha (/ˈɑːrkioʊsaɪəθə/, 'ancient cups') is a taxon of extinct, sessile, reef-building[1] marine sponges that lived in warm tropical and subtropical waters during the Cambrian Period. It is believed that the centre of the Archaeocyatha origin is now located in East Siberia, where they are first known from the beginning of the Tommotian Age of the Cambrian, 525 million years ago (mya).[2] In other regions of the world, they appeared much later, during the Atdabanian, and quickly diversified into over a hundred families.
They became the planet's first reef-building animals and are an index fossil[3] for the Lower Cambrian worldwide.
^Archaeocyathid reef structures ("bioherms"), although not as massive as later coral reefs, might have been as deep as ten meters (Emiliani 1992:451).
^Maloof, A.C. (2010). "Constraints on early Cambrian carbon cycling from the duration of the Nemakit-Daldynian–Tommotian boundary $$\delta$$13C shift, Morocco". Geology. 38 (7): 623–626. Bibcode:2010Geo....38..623M. doi:10.1130/G30726.1. S2CID 128842533.
^Anderson, Dr. John R. "Paleozoic Life". Georgia Perimeter College. Archived from the original on 20 July 2011. Retrieved 6 July 2010.
Archaeocyatha (/ˈɑːrkioʊsaɪəθə/, 'ancient cups') is a taxon of extinct, sessile, reef-building marine sponges that lived in warm tropical and subtropical...
walls and septa in Archaeocyatha. They have been considered separate phyla, however, the consensus is growing that Archaeocyatha was in fact a type of...
cnidarians; algae; foraminiferans; a completely separate phylum of animals, Archaeocyatha; or even a completely separate kingdom of life, labeled Archaeata or...
name for all Porifera that build reefs. In the early Cambrian period, Archaeocyatha sponges were the world's first reef-building organisms, and sponges...
Marine Species. Retrieved 18 July 2012. Rowland SM, Stephens T (2001). "Archaeocyatha: A history of phylogenetic interpretation". Journal of Paleontology...
times. During the Cambrian Period, the conical or tubular skeletons of Archaeocyatha, an extinct group of uncertain affinities (possibly sponges), built...
stromatolites which had been replaced by reef building sponges known as Archaeocyatha, returned once more as the archaeocyathids became extinct. This declining...
macrofossils in Franconia, which are also the oldest in Bavaria, are archaeocyatha, sponge-like, goblet-shaped marine organisms, which were discovered...
Tumuliolynthus, Kotuyicyathus, Metaldetes, Ajacicyathus and Paranacyathus. Archaeocyatha is sometimes classified as a class of Porifera below. Quintessential...
The original volume is out of print but is available here. Part E. Archaeocyatha & Porifera, xviii + 122 p., 89 fig., 1955. ISBN 0-8137-3005-8. The original...
scleractinian corals, but in the distant past other organisms, like archaeocyatha (during the Cambrian) or extinct cnidaria (tabulata and rugosa) were...
Species. Retrieved 18 July 2012. Rowland, S. M. & Stephens, T. (2001). "Archaeocyatha: A history of phylogenetic interpretation". Journal of Paleontology...
C P T J K Pg N Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Porifera Clade: †Archaeocyatha Genus: †Rosnaiella F. Doré, 1969...
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