Linguliformea (Linguliforms)

Linguliformea is a subphylum of former inarticulate brachiopods. These were the earliest of brachiopods, ranging from the Cambrian into the Holocene. They rapidly diversified during the Cambrian into the Ordovician, but 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 separates dorsal and ventral mantles. The shells are usually made up of apatite (calcium phosphate), however rare cases have calcite or aragonite shells.

Source: http://en.wikipedia.org/wiki/Linguliformea

Orbiculoidea				Ich6770
Orbiculoidea				JB5
Orbiculoidea				p1029
Orbiculoidea				p1007
Orbiculoidea				p5694
Orbiculoidea				Ich6815
Orbiculoidea				XA843
Orbiculoidea				Ich5704
Orbiculoidea				Ich5718
Orbiculoidea				JB6
Orbiculoidea				BB464
Orbiculoidea				JB195
Orbiculoidea				Ich6769
Orbiculoidea				JB15
Orbiculoidea				p5724
Orbiculoidea				BB465
Orbiculoidea				p1025
Orbiculoidea				MŠ2815
Orbiculoidea				Ich6814
Orbiculoidea				Ich6768

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Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]