Stromatoporata (Stromatoporoids)

Stromatoporoidea is a class of aquatic invertebrates common in the fossil record from the Ordovician through the Cretaceous. They were especially abundant in the Silurian and Devonian. These invertebrates were important reef-formers throughout the Paleozoic and the Late Mesozoic. The group was previously thought to be related to the corals and placed in the Phylum Cnidaria. They are now classified in the sponges (Phylum Porifera), specifically the sclerosponges. There are numerous fossil forms with spherical, branching or encrusting skeletons of laminated calcite with vertical pillars between the laminae.

Stromatoporoids are useful markers whose form and occurrence can diagnose the depositional environment of sedimentary strata.

Source: Wikipedia: http://en.wikipedia.org/wiki/Stromatoporoidea

Shapes of the stromatoporoid colonies

A section through the stromatoporoid colony

Actinodictyon tenue		XA96
Actinostroma crassepilatum	Zukalová (1958), Pl. I, fig. 1 H13; výbrusy 815-817, 820, 1216, 1218	VZ1
Actinostroma dehorneae	Zukalová (1958), Pl. II, fig. 1 C1, výbrusy 794-796	VZ6
Actinostroma devonense	Zukalová (1958), Pl. I, fig. 2 B1; výbrusy 787-790, 1223	VZ5
Actinostroma fungiforme	Zukalová (1958), Pl. III, fig. 1, 2, A36; výbrusy 901-903	VZ14
Actinostroma verrucosum	Zukalová (1958), Pl. IV, fig. 1, A27; výbrusy 873-877, 1214	VZ15
Amphipora ramosa		p4449
Atelodictyon moravicum	Zukalová (1958), Pl. V, fig. 1, 2, text. fig. 19i, 19e; Pl. VI, fig. 3, text. fig. 19h	VZ19
Clathodictyon boreale		XA99
Clathodictyon clivosum		XA92
Clathodictyon		p3655
Clathrodictyon paramygdaloides	Zukalová (1958), Pl. IV, fig. 2	VZ20
Densastroma astrodes		XA93
Densastroma pexisum		XA100
Ecclimadictyon fastigiatum		XA101
Pachylostroma estoniense		XA98
Parallelostroma typicum		XA102
Pseudolabechia		XA95
Stromatocerium sakuense		XA97
Stromatopora columnaris		VZ30

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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]