Holophragma

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.

Holophragma
Temporal range: Ordovician–Silurian
The species Holophragma calceoloides.
Scientific classification
Kingdom:
Animalia
Phylum:
Cnidaria
Class:
Anthozoa
Order:
†Rugosa
Family:
†Lykophyllidae
Genus:
†Holophragma

Lindström, 1896
Species

See list of Holophragma species

Description

Members of the Holophraga genus 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
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References
  1. "Holophragma". Fossilworks. Retrieved 2019-06-06.
  2. Sunstones and catskulls. Guide to the Fossils and geology of Gotland. Sara Elison. s.64. 2000
  3. "Holophragma". Fossiilid.info. Retrieved 2019-06-06.


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