| 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 capillaris | Štorch (1998), Pl. 19, fig. 6 | | | PŠ924 | Monograptus capillaris | Štorch (1998), Pl. 13, fig. 2; Text-fig. 8, fig. 3 | | | PŠ696 | Monograptus capillaris | | | | PŠ923 | Monograptus curvus (Manck) | | | | BB757 | Monograptus dalejensis | | | | PŠ647 | Monograptus dalejensis | ?torch (1995), Fig. 8F | | | PŠ614 | Monograptus dalejensis | Štorch (1995), Fig. 8G (kus 658/1) | | | PŠ658 | Monograptus dalejensis | Štorch (1995), Fig. 8D; Pl. 4, fig. 4 (kus 669/3); Fig. 8H (kus 669/2) | | | PŠ669 | Monograptus dalejensis | | | | PŠ615 | Monograptus dalejensis | Štorch (1995), Fig. 8E; Pl. 5, fig. 6 (kus 629/1) | | | PŠ629 | Monograptus dalejensis | | | | PŠ657 | Monograptus densus | | | | p4526 | Monograptus densus | | | | p424 | Monograptus densus | | | | p426 | Monograptus difformis | | | | PŠ310 | Monograptus difformis | Štorch (2023), Fig. 6E | | | PŠ4380 | Monograptus dracocephalus Štorch, 1998 | | | | PŠ851 | Monograptus dracocephalus Štorch, 1998 | Štorch (1998), Pl. 13, fig. 6; Text-fig. 8, figs. 4A, B (Holotyp=B) | | | PŠ756 | Monograptus drepanoformis Toghill & Strachan, 1970 | Štorch (2023), Fig. 12N - PŠ4354 / 2 | | | PŠ4354 | Monograptus dubius | | | | HJ6 |
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