Holophragma is an extinct genus of rugose coral known from Ordovician and Silurian rocks in Scandinavia, Russia, Australia and the United States.[1] Two of its species can be found on the northwestern coast of Gotland, where it is one of the most common fossil genera.[2] It was described by Gustaf Lindström in the year 1896.[3] The genus contains two species.
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| The species Holophragma calceoloides. | |
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| Genus: | †Holophragma Lindström, 1896
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Description edit
Members of the genus Holophraga are small shoe- or horn-shaped corals. They usually lived on their side, with their calyx pointing upwards. H. calceoloides has a distinct cardinal septa, while H. mitrata does not.
Species edit
- Holophragma calceoloides Lindström, 1866
- Holophragma mitrata Schlotheim, 1820
References edit
- ^ "Holophragma". Fossilworks. Retrieved 17 December 2021.
- ^ Sunstones and catskulls. Guide to the Fossils and geology of Gotland. Sara Elison. s.64. 2000
- ^ "Holophragma". Fossiilid.info. Retrieved 2019-06-06.
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