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

Teneobolus gracilis		MM512
Thysanotos siluricus		PP680
Thysanotos siluricus		PP678
Thysanotos siluricus		PP675
Thysanotos siluricus		PP679
Thysanotos siluricus		MM396
Thysanotos siluricus		p4704
Thysanotos siluricus	Mergl (1984a), Pl. I, fig. 12, 13	MM77
Thysanotos siluricus		YA958
Thysanotos siluricus		PP676
Thysanotos siluricus		PP674
Thysanotos siluricus		YA957
Thysanotos siluricus	Mergl (1997a), Pl. II, fig. 1	MM405
Thysanotos siluricus		PP677
Thysanotos siluricus	Mergl (1997a), Pl. I, fig. 1	MM440
Thysanotos siluricus		PP681
Thysanotos speciosus	Mergl (1997a), Pl. I, fig. 2	MM404
Trematobolus		MM175
Trematobolus		MM174
Trematobolus		MM180

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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]