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The Rugosa or rugose corals are an extinct order of solitary and colonial corals that were abundant in Middle Ordovician to Late Permian seas. [3] Solitary rugosans (e.g., Caninia, Lophophyllidium, Neozaphrentis, Streptelasma) are often referred to as horn corals because of a unique horn-shaped chamber with a wrinkled, or rugose, wall. Some ...
Hydnophora rigida, commonly known as horn coral, are found in reefs and are in the genus Hydnophora. [1] They were first described by James Dwight Dana [1] in 1846. [1] Their color is naturally green and brown, or sometimes cream. They can also become fluorescent green [2] and cyano-red emission. [3]
Heliophyllum is an extinct genus of corals that existed predominantly in the Devonian. Heliophyllum is of the order Rugosa and can be referred to as horn corals. [1] [2] They were mostly solitary animals, although some were colonial. [1] The genus had a wide distribution.
Hydnophora exesa, also called Horn coral or Spine coral, is a coral in the genus Hydnophora. [1] It was described by Peter Simon Pallas in 1766. [1] Location.
Elkhorn coral (Acropora palmata) is an important reef-building coral in the Caribbean. The species has a complex structure with many branches which resemble that of elk antlers; hence, the common name. The branching structure creates habitat and shelter for many other reef species.
The classification of corals has been discussed for millennia, owing to having similarities to both plants and animals. Aristotle's pupil Theophrastus described the red coral, korallion, in his book on stones, implying it was a mineral, but he described it as a deep-sea plant in his Enquiries on Plants, where he also mentions large stony plants that reveal bright flowers when under water in ...
Holophragma mitrata is an extinct species of Rugose coral mainly known from the island of Gotland. It is horn shaped and can grow to about 40mm in length. The calyx is relatively deep and the septa runs from its ridge to the floor. The cardinal septa is not very dominant. [1] It was described by Schlotheim in the year 1820 under the name ...
Acervulariidae is an extinct family of horn coral. These stationary epifaunal suspension feeders lived during the Devonian, Silurian and Ordovician periods. [1]