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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

Coremagraptus spectabilis p1301
Coremagraptus spectabilis p5568
Coremagraptus spectabilis p5578
Coremagraptus spectabilis p5946
Coremagraptus spectabilis p5565
Coremagraptus spectabilis p5948
Coremagraptus spectabilis p5557
Coremagraptus thallograptoides p5572
Coremograptus flexuosus p6121
Coronograptus cyphus PŠ225
Coronograptus cyphusŠtorch (2023), Fig. 6K PŠ4383
Coronograptus cyphus PŠ223
Coronograptus cyphusŠtorch (1988), Pl. II, fig. 1 PŠ230
Coronograptus cyphus PŠ216
Coronograptus cyphus PŠ238
Coronograptus cyphus cyphusŠtorch (1988), Pl. IV, fig. 5, text. fig. 4K BB638
Coronograptus cyphus cyphusŠtorch (1988), Pl. IV, fig. 4 BB639
Coronograptus cyphus cyphusŠtorch (1988), Pl. III, fig. 1 PŠ265
Coronograptus gregariusŠtorch (1988), Pl. XII, fig. 5, text. fig. 2H PŠ252
Coronograptus gregarius PŠ132
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]