Linguliformea: Difference between revisions
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'''Subphylum Linguliformea''' are a form of inarticulate [[brachiopods]]. These were the earliest of brachiopods, ranging from the [[Cambrian]] into the [[Holocene]]. They rapidly diversified during the Cambrian into the [[Ordovician]], however most families went extinct by the end of the [[Devonian]]. |
'''Subphylum Linguliformea''' are a form of inarticulate [[brachiopods]]. These were the earliest of brachiopods, ranging from the [[Cambrian]] into the [[Holocene]]. They rapidly diversified during the Cambrian into the [[Ordovician]], however most families went extinct by the end of the [[Devonian]]. |
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The articulation in these brachiopods is lacking. These brachiopods have adductor and oblique muscles, but no diductor muscles. The anus is located at the side of the body. The pedicle is a hollow extension of the ventral body wall. Posterior body wall seperates dorsal and ventral mantles. |
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The shells are usually made up of [[apatite]] (calcium phosphate), however rare cases have [[calcite]] or [[aragonite]] shells. |
The shells are usually made up of [[apatite]] (calcium phosphate), however rare cases have [[calcite]] or [[aragonite]] shells. |
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Revision as of 02:50, 1 December 2006
Subphylum Linguliformea are a form of inarticulate brachiopods. These were the earliest of brachiopods, ranging from the Cambrian into the Holocene. They rapidly diversified during the Cambrian into the Ordovician, however most families went extinct by the end of the Devonian.
The articulation in these brachiopods is lacking. These brachiopods have adductor and oblique muscles, but no diductor muscles. The anus is located at the side of the body. The pedicle is a hollow extension of the ventral body wall. Posterior body wall seperates dorsal and ventral mantles.
The shells are usually made up of apatite (calcium phosphate), however rare cases have calcite or aragonite shells.