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	AD, Kříž a kol. (1986)	JK7728
Orbiculoidea	AD, Kříž a kol. (1986)	JK7729
Orbiculoidea	AD, Kříž a kol. (1986)	JK7730
Orbiculoidea	AD, Kříž a kol. (1986)	JK7732
Orbiculoidea	AD, Kříž a kol. (1986)	JK7733
Orbiculoidea	AD, Kříž a kol. (1986)	JK7734
Orbiculoidea	AD, Kříž a kol. (1986)	JK7735
Orbiculoidea	AD, Kříž a kol. (1986)	JK7736
Orbiculoidea	AD, Kříž a kol. (1986)	JK7738
Orbiculoidea		p2350
Orbiculoidea		YA1093
Orbiculoidea	AD, Kříž a kol. (1986)	JK7731
Orbiculoidea	AD, Kříž a kol. (1986)	JK7737
Orbiculoidea		CW906
Orbiculoidea		JP1061
Orbiculoidea	AD ? Kříž a kol. (1986)	JK7551
Orbiculoidea		p1023
Orbiculoidea		JB186
Orbiculoidea		JB18
Orbiculoidea		JB294

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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]