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

Desmograptus callograptoides		XA338
Desmograptus callograptoides		BB301
Dicellograptus laticeps		MD367
Dicellograptus laticeps	Štorch (1989), Pl. I, fig. 6, text. fig. 1F	PŠ311
Dicellograptus laticeps		PB1105
Dicellograptus laticeps		PŠ312
Dicellograptus laticeps		MD357
Dicellograptus laticeps	Štorch (1989), Pl. I, fig. 1, text. fig. 1G	PŠ314
Dicellograptus laticeps		PŠ313
Dicellograptus laticeps		MD387
Dicellograptus laticeps		MD385
Dicellograptus morrisi		BB653
Dicranograptus clingani	Havlíček a Vaněk (1966), Pl. XIII, fig. 1	YA85
Dicranograptus clingani	Havlíček a Vaněk (1966), Pl. XIII, fig. 2	YA85
Dictonema delicatulum		p1423
Dictyonema balticum	Kraft (1982), Pl. 3, fig. 5, 6	MŠ7181
Dictyonema balticum	Kraft (1982), Pl. 2, fig. 4	MŠ7187
Dictyonema balticum		MŠ7179
Dictyonema delicatulum		p779
Dictyonema delicatulum	Kraft (1982), Pl. 3, fig. 3, 4	MŠ7184

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Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]