| 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
  Campograptus clingani | Štorch (1998), Pl. 19, fig. 8.; Text-fig. 10, fig. 4B | | | PŠ919 | Campograptus clingani | | | | PŠ863 | Campograptus clingani | Štorch (1988), Pl. X, fig. 2 | | | PŠ249 | Campograptus clingani | Štorch (1988), text. fig. 6B | | | PŠ250 | Campograptus communis | Štorch (1998), Pl. 12, fig. 5; Text-fig. 10, fig. 1A | | | PŠ737 | Campograptus communis | | | | PŠ258 | Campograptus communis | Štorch (1998), Pl. 12, fig. 2; Text-fig. 10, fig. 1B | | | PŠ794 | Campograptus communis rostratus | | | | PŠ229 | Campograptus communis rostratus | Štorch (1988), Pl. IX, fig. 1 | | | PŠ207 | Campograptus communis rostratus | Štorch (1988), Pl. IX, fig. 3 | | | PŠ239 | Campograptus communis rostratus | Štorch (1988), Pl. 9, fig. 5 | | | PŠ93 | Campograptus communis rostratus | | | | PŠ266 | Campograptus lobiferus | Štorch (1988), Pl. XII, fig. 6, text. fig. 4M | | | PŠ271 | Campograptus lobiferus | | | | p381 | Campograptus lobiferus | Štorch (1988), Pl. XII, fig. 2 | | | PŠ275 | Campograptus lobiferus | | | | p5258 | Campograptus lobiferus | Štorch (1988), Pl. XII, fig. 1, text. fig. 4E | | | PŠ272 | Campograptus lobiferus | AD Horný (1956) | | | RH13 | Campograptus lobiferus | AD Horný (1956) | | | RH8 | Campograptus lobiferus harpago | Štorch (1998), Pl. 10, fig. 1 | | | PŠ757 |
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