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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

Pristiograptus regularis solidusŠtorch (2001), Pl. III, fig. 2 PŠ1034
Pristiograptus p3841
Pristiograptus p3830
Pristiograptus p3861
Pristiograptus p3834
Pristiograptus SM269
Pristiograptus BB607
PristiograptusŠtorch et al. (1984), Pl. I, fig. 4 PŠ188
PristiograptusŠtorch et al (1984), Pl. I, fig. 1 PŠ194
Pristiograptus PŠ195
Pristiograptus YA152
Pristiograptus BB620
Pristiograptus p3840
Pristiograptus PŠ189
PristiograptusŠtorch et al. (1984), Pl. I, fig. 5 PŠ193
Pristiograptus BB610
PristiograptusAD Manda et al. (2019) PŠ3844
PristiograptusAD Manda et al. (2019) PŠ3901
PristiograptusAD Manda et al. (2019) PŠ3857
Pristiograptus ultimus SM162
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]