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Graptolithina

      Graptolithina is the a class in the animal phylum Hemichordata, the members of which are known as Graptolites. Graptolites are fossil colonial animals known chiefly from the Upper Cambrian through the Lower Carboniferous (Mississippian). A possible early graptolite, Chaunograptus, is known from the Middle Cambrian. The name graptolite comes from the Greek graptos, meaning "written", and lithos, meaning "rock", as many graptolite fossils resemble hieroglyphs written on the rock. Linnaeus originally regarded them as 'pictures resembling fossils rather than true fossils', though later workers, supposed them to be related to the hydrozoans.[citation needed] More recent work places them near the pterobranchs, possibly within.

Sources: http://en.wikipedia.org/wiki/Graptolite

On-line reference: Benton a Harper: Introduction to the Paleobiology

Zdroj: Benton a Harper: Introduction to the Paleobiology

Monograptus angustidens p5532
Monograptus angustidens p5537
Monograptus angustidens p5482
Monograptus angustidens p5463
Monograptus angustidens p5520
Monograptus angustidens p5444
Monograptus angustidens p3565
Monograptus angustidens p5530
Monograptus angustidens p5441
Monograptus angustidens p5967
Monograptus angustidens p5538
Monograptus angustidens p5442
Monograptus angustidens p3567
Monograptus angustidens p5485
Monograptus angustidens p5518
Monograptus antennularius PŠ376
Monograptus antennularius BB780
Monograptus austerus PŠ202
Monograptus austerusŠtorch (1988), Pl. III. fig. 2, text. fig. 2F PŠ267
Monograptus austerus austerus PŠ214

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