Cryptostomata


Also found in: Wikipedia.

Cryptostomata

[‚krip·tə′stō·məd·ə]
(paleontology)
An order of extinct bryozoans in the class Gymnolaemata.

Cryptostomata

 

an order of fossil Bryozoa. The colonies of Cryptostomata are small (up to 15 cm), predominantly reticular; more rarely, they are branching or lamellar. The calcareous skeleton is permeated by a system of capillaries. There are three suborders, comprising ten families (approximately 150 genera). Widely distributed from the Ordovician to the beginning of the Triassic, they lived in seas and participated in the formation of reefs. They have great stratigraphic significance.

REFERENCES

Osnovy paleontologii: Mshanki, brakhiopody. Moscow, 1960.
Astrova, G. G. Morfologiia, istoriia razvitiia i sistema ordovikskikh i siluriiskikh mshanok. Moscow, 1965.
Morozova, I. P. Mshanki pozdnei permi. Moscow, 1970.
References in periodicals archive ?
axes distichously arranged in one plan; elongated spatulate leaves with attenuated Taxonomic Epithet Key morphological rank characters base, cryptostomata thin to large, mostly aligned on each side of the midrib, and dentate margins; vesicles supported by a long pedicel, spherical to obovoid, smooth or with a short mutro, a foliar appendage or crown, or differentiated into phyllocysts; receptacles mostly bisexual, with serrate margins and arranged in dense cymose glomerules.
Cryptostomata, of variable number and size, are either randomly distributed over the leaves' surface or aligned on each side of the midrib in one to several rows.