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Rugosa |
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Rugosa [‚rü′gō·sə]
(paleontology) An order of extinct corals having either simple or compound skeletons with internal skeletal structures consisting mainly of three elements, the septa, tabulae, and dissepiments. Rugosa (also Tetracorallia), a subclass of extinct coelenterates of the class Actinozoa that existed from the Middle Ordovician to the end of the Permian. The coelenterates were solitary or colonial polyps having a calcareous external skeleton. Solitary forms were hornlike, cylindrical, or prismatic. Some had an operculum that covered the osculum when there was danger. The polyps inhabited shallow zones of seas, attaching themselves to underwater objects or lying freely on the bottom. In contrast to extant hexactinal polyps, Rugosa did not form reefs. The coelenterates are valuable in understanding the stratigraphy of the Paleozoic and the total evolution of coral polyps. REFERENCEDrushin, V. V. Paleontologiia bespozvonochnykh. Moscow, 1974.Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | In addition, encountering problems with existing collections led the authors to revise the taxonomy, biostratigraphy, and phylogeny of all Cisuralian colonial rugose coral faunas from western and northwestern Pangaea and to reconsider their origin and dispersal within the CAU Realm. The Vormsi age of the Hulterstad erratics is supported also by the rugose corals in the boulders (Webby et al. The Mustjala Member contains tabulate corals, stromatoporoids, rugose corals, brachiopods, and crinoidal debris. |
Rugose coral |
RUGH Rughetta Rugia Rugia Rugieri Rugila Rugila Rugin rugine rugine rugitus rUGM RUGO Rugoev, Iaakko Rugoev, Iaakko Vasilevich rugola rugola Rugopharynx Rugopharynx australis Rugopharynx rosemariae Rugosa Rugosa Rugosa rugosas rugosas rugosas rugoscopy rugose rugose rugose Rugose coral rugose mosaicRugose Tegument rugosely rugosely rugosely rugosity rugosity rugosity rugous rugous rugous Rugova, Ibrahim Rugrats Rugs Rugs Rugs Rugs Rugs Rugulach rugulah Rugulose Ruh Ruhamah RUHBC Ruhe in Frieden RUHF Ruhi al- Khalidi Ruhmkorff coil Ruhmkorff coil Ruhmkorff's coil | |||||||
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