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

Coronograptus gregarius	Štorch (1988), text. fig. 21	PŠ245
Coronograptus gregarius	Štorch (1988), Pl. IV, fig. 2, 3, text. fig. 2J	PŠ248
Coronograptus gregarius		PŠ276
Coronograptus gregarius		PŠ209
Coronograptus gregarius	Štorch (1988), Pl. IV, fig. 1	PŠ246
Coronograptus gregarius	Štorch (1998), Pl. 7, fig. 6; Text-fig. 7, fig. 7C	PŠ788
Coronograptus gregarius		PŠ208
Coronograptus gregarius gregarius		PŠ746
Coronograptus gregarius gregarius	Štorch (1998), Pl. 7, fig. 5; Text-fig. 7, figs. 7B	PŠ809
Coronograptus gregarius maxiculus		PŠ257
Coronograptus gregarius maxiculus		PŠ253
Coronograptus maxiculus	Štorch (1998), Text-fig. 7, fig 6B	PŠ754
Coronograptus maxiculus	Štorch (1998), Pl. 7, fig. 2; text-fig. 7, fig. 6A	PŠ764
Corymbograptus imminutus	Bouček (1973), Pl. IX, fig. 5, text. fig. 16h, i	BB59
Corymbograptus imminutus		BB358
Corymbograptus imminutus	Bouček (1973), text. fig. 16j	BB60
Corymbograptus retroflexus		XA763
Corymbograptus retroflexus		BB329
Corymbograptus retroflexus		PP1419
Corymbograptus retroflexus		PP1411

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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]