| 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
Rivagraptus bellulus | Štorch (1998), Pl. 6, fig. 6; Fig. 4, Fig. 9B | | | PŠ857 | Rivagraptus bellulus | Štorch (1998), Pl. 6, fig. 4; Text-fig. 4, fig. 9A | | | PŠ787 | Rivagraptus bellulus | | | | PŠ735 | Rivagraptus bellulus | Štorch (1998), Pl. 6, fig. 5 | | | PŠ830 | Rivagraptus cyperoides | Štorch (1985), Pl. 1, fig. 2, text. fig. 2F | | | PŠ163 | Rivagraptus cyperoides | Štorch (1985), Pl. I, fig. 4, text. fig. 2G (PŠ 21/1); Pl. I, fig. 1 (PŠ 21/2) | | | PŠ21 | Rivagraptus cyperoides | AD, Štorch (1985) | | | PŠ153 | Rivagraptus cyperoides | AD, Štorch (1985) | | | PŠ165 | Rivagraptus cyperoides | AD, Štorch (1985) | | | PŠ22 | Rivagraptus cyperoides | AD, Štorch (1985) | | | PŠ152 | Rivagraptus rozmanae | Štorch (1998), Text-fig. 4, fig. 7 (kus ozn. jako 1) | | | PŠ784 | Rivagraptus sentus | | | | PŠ784 | Rivagraptus | | | | RH143 | Rodonograptus astericus | | | | p5286 | Saetograptus chimaera (Barrande) | | | | BB786 | Saetograptus linearis Bouèek | | | | PB955 | Saetograptus | | | | PB903 | Saetograptus | | | | PB901 | Saetograptus | | | | PB900 | Saetograptus | | | | PB908 |
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