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Stromatoporoidea

Stromatoporoidea

A Dictionary of Earth Sciences | 1999 | | Copyright

Stromatoporoidea Extinct group that has been attributed to the Hydrozoa, sponges (Porifera), foraminifera (Foraminiferida), Bryozoa, or algae, or regarded as a phylum with no modern representatives. Stromatoporoids are calcareous masses built up of horizontal layers (latilaminae) and vertical pillars. The calcareous skeleton is called the coenosteum. The upper surfaces show a pattern of polygonal markings and may have swellings (mammelons) and stellate grooves (astrorhizae). They are found in limestones of Cambrian to Cretaceous age, often forming reefs in Ordovician to Devonian times.
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AILSA ALLABY and MICHAEL ALLABY. "Stromatoporoidea." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Stromatoporoidea." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O13-Stromatoporoidea.html

AILSA ALLABY and MICHAEL ALLABY. "Stromatoporoidea." A Dictionary of Earth Sciences. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Stromatoporoidea.html

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Stromatoporoidea

A Dictionary of Zoology | 1999 | | Copyright

Stromatoporoidea An extinct group that has been attributed to the hydrozoans, sponges, foraminifera, bryozoans, algae, or regarded as a phylum with no modern representatives. Stromatoporoids are calcareous masses built up of horizontal laminae and vertical pillars. The upper surfaces show a pattern of polygonal markings and may have swellings and stellate grooves. They are found in limestones of Cambrian to Cretaceous age, often forming reefs in Ordovician to Devonian times.
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MICHAEL ALLABY. "Stromatoporoidea." A Dictionary of Zoology. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "Stromatoporoidea." A Dictionary of Zoology. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O8-Stromatoporoidea.html

MICHAEL ALLABY. "Stromatoporoidea." A Dictionary of Zoology. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-Stromatoporoidea.html

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