The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



an extinct order of animals of the phylum Brachiopoda that lived from the Silurian to the Permian. The shell, which had a convex ventral valve and a flat or concave dorsal one, reached a length of 25 cm. The surface of the shell had hollow needles. The inside of the dorsal valve shows traces of attachment of long body processes—arms—that lacked special skeletal formations. Productida were attached to the sea bottom or lay on it. Their remains are valuable to stratigraphers in the study of Paleozoic deposits.


Osnovy paleontologii: Mshanki, brakhiopody. Moscow, 1960. Page 221.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive ?
Silurian brachiopods Dictyonellida, Strophomenida, Productida, Orthotetida, Protorthida and Orthida from Estonia.
27 species f rom 13 genera regarding Late Permian brachiopod s were recognized in the present research work, Theost significant brachiopod families, in terms of frequency and variety, included Productida, Strophomenida, Rhynconellida and Athyris.
The recognised fossil community was compared to brachiopod communities in some regions of Iran, and they belong to the orders Athyris, Rhynconellida, Productida and Strophomenida.

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