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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

Streptograptus storchi Loydell BB756
Streptograptus wimani (Bouček, 1932)Štorch (2023), Fig. 15N PŠ4399
Streptograptus wimani (Bouček, 1932)Štorch (2023), Fig. 18A PŠ241
Styracograptus Štorch et al., 2011 PB1111
Testograptus CW771
Testograptus testisManda et al. (2019) Fig. 7E PŠ3898
Testograptus testisAD Manda et al. (2019) PŠ3897
Testograptus testis JK18019
Testograptus testis BB626
Testograptus testis YA106
Testograptus testis BB628
Testograptus testis BB632
Testograptus testis BB630
Testograptus testis JK18018
Testograptus testis JK18017
Testograptus testisManda et al. (2019) Fig. 8C; Štorch (2023) Fig. 20E PŠ3887
Testograptus testis BB621
Testograptus testis BB631
Tetragraptus abbreviatusBouček (1973), Pl. II, fig. 7, text. fig. 3c BB14
Tetragraptus abbreviatusBouček (1973), text. fig. 3a BB1
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]