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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 limatulus inopinus PŠ865
Monograptus limatulus limatulusŠtorch (1998), Pl. 8, fig. 4; Text-fig. 7, fig. 4A PŠ757
Monograptus limatulus limatulus PŠ847
Monograptus limatulus limatulus BB6940
Monograptus limatulus limatulusŠtorch (1998), Pl. 20, fig. 3.; Text-fig. 6, fig. 6 PŠ926
Monograptus limatulus limatulusŠtorch (1998), Pl. 20, fig. 6; Fig. 7, Fig. 4B PŠ783
Monograptus limatulus limatulusŠtorch (1998), Pl. 20, fig. 6; Fig. 7, Fig. 4B PŠ860
Monograptus lobiferus p3829
Monograptus lobiferus p3839
Monograptus lobiferus PŠ273
Monograptus lochkovense HJ75
Monograptus lochkovense HJ74
Monograptus lochkovense HJ71
Monograptus lochkovense HJ73
Monograptus lochkovense HJ72
Monograptus lochkovensis HJ13
Monograptus lochkovensis HJ20
Monograptus microdon p5546
Monograptus microdon p5490
Monograptus microdon microdon p5854
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]