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  2. Rugosa - Wikipedia

    en.wikipedia.org/wiki/Rugosa

    "Tetracorallia" from Ernst Haeckel's Kunstformen der Natur, 1904 Cross-section of Stereolasma rectum, a rugose coral from the Middle Devonian of Erie County, New York. The Rugosa, also called the Tetracorallia, rugose corals, or horn corals, are an extinct order of solitary and colonial corals that were abundant in Middle Ordovician to Late Permian seas.

  3. Gymnophyllum - Wikipedia

    en.wikipedia.org/wiki/Gymnophyllum

    Gymnophyllum wardi, commonly known as button coral, is an extinct coral from the Pennsylvanian part of the Carboniferous period. [1] The fossils are found in relatively few places worldwide; most specimens are known from the upper part of the Wewoka formation in and around Lake Okmulgee in Okmulgee State Park or the adjoining Dripping Springs State Park in Okmulgee County, Oklahoma in the ...

  4. Coral - Wikipedia

    en.wikipedia.org/wiki/Coral

    Both rugose and tabulate corals became extinct in the Permian–Triassic extinction event [88] [90 (along with 85% of marine species), and there is a gap of tens of millions of years until new forms of coral evolved in the Triassic.

  5. 44% of warm-water coral species facing extinction ... - AOL

    www.aol.com/44-warm-water-coral-species...

    Almost half of warm-water reef-building coral species are at risk of extinction, conservationists have warned after a global assessment announced at the UN climate conference.

  6. Tabulata - Wikipedia

    en.wikipedia.org/wiki/Tabulata

    Tabulata, commonly known as tabulate corals, are an order of extinct forms of coral. They are almost always colonial, forming colonies of individual hexagonal cells known as corallites defined by a skeleton of calcite, similar in appearance to a honeycomb. Adjacent cells are joined by small pores.

  7. Scientists discover the world’s largest coral — so big it can ...

    www.aol.com/news/scientists-discover-world...

    More than 40% of warm-water reef-building coral species now face extinction, primarily because of climate change, according to the International Union for Conservation of Nature’s Red List of ...

  8. Heliophyllum - Wikipedia

    en.wikipedia.org/wiki/Heliophyllum

    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.

  9. Gray Whales & 19 Other Marine Species That Could Go Extinct ...

    www.aol.com/gray-whales-19-other-marine...

    As marine life deals with the effects of plastic pollution and climate change, a huge number of species are feeling the burn. From coral reefs to river dolphins, these 20 marine species have their ...