Aspidiscus cristatus from the Cenomanian (Upper Cretaceous) of southern Israel; oral view.Aspidiscus cristatus from the Cenomanian (Upper Cretaceous) of southern Israel; aboral view.
Hexacorallia is a class of Anthozoa comprising approximately 4,300 species of aquatic organisms formed of polyps, generally with 6-fold symmetry. It includes all of the stony corals, most of which are colonial and reef-forming, as well as all sea anemones, and zoanthids, arranged within five extant orders.[2] The hexacorallia are distinguished from another class of Anthozoa, Octocorallia, in having six or fewer axes of symmetry in their body structure; the tentacles are simple and unbranched and normally number more than eight.[3] These organisms are formed of individual soft polyps which in some species live in colonies and can secrete a calcite skeleton. As with all Cnidarians, these organisms have a complex life cycle including a motile planktonic phase and a later characteristic sessile phase. Hexacorallia also include the significant extinct order of rugose corals.
^Han, Jian; Kubota, Shin; Uchida, Hiro-omi; Stanley Jr., George D.; Yao, Xiaoyong; Shu, Degan; Li, Yong; Yasui, Kinya (October 13, 2010). "Tiny Sea Anemone from the Lower Cambrian of China". PLOS One. 5 (10): e13276. Bibcode:2010PLoSO...513276H. doi:10.1371/journal.pone.0013276. PMC 2954142. PMID 20967244.
^Daly, M.; Brugler, M.P.; Cartwright, P.; Collins, A.G.; Dawson, M.N.; Fautin, D.G.; France, S.C.; McFadden, C.S.; Opresko, D.M.; Rogriguez, E.; Romano, S.L.; Stake, J.L. (2007-07-21). "The phylum Cnidaria: A review of phylogenetic patterns and diversity 300 years after Linnaeus". Zootaxa. 1668: 1–766. doi:10.11646/zootaxa.1668.1.11. hdl:1808/13641. ISSN 1175-5326.
^Light. Sol Felty (2007). The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon. University of California Press. p. 177. ISBN 978-0-520-23939-5.
Hexacorallia is a class of Anthozoa comprising approximately 4,300 species of aquatic organisms formed of polyps, generally with 6-fold symmetry. It includes...
Myxozoa and Polypodiozoa. The two main subclasses of Anthozoa are the Hexacorallia, members of which have six-fold symmetry and includes the stony corals...
Zoantharia. The term Zoantharia in turn is used temporarily instead of Hexacorallia. However, major taxonomic papers published since 1899 by specialists...
anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia. As cnidarians, sea anemones are related to corals, jellyfish, tube-dwelling...
ceriantharians (tube-dwelling anemones), but were later reclassified under Hexacorallia. Though they have historically been used by Pacific Islanders for medical...
usually in multiples of four, hence Tetracorallia in contrast to modern Hexacorallia, colonial polyps generally with sixfold symmetry. Rugose corals have...
(2006). "Morphological and Molecular Revision of Zoanthus (Anthozoa: Hexacorallia) from Southwestern Japan, with Descriptions of Two New Species". Zoological...
(Ceriantharia) Sea anemones (Actinaria, part of Hexacorallia) Coral Acropora muricata (Scleractinia, part of Hexacorallia) Sea fan Gorgonia ventalina (Alcyonacea...
animals within the sub-classes Hexacorallia and Octocorallia of the class Anthozoa in the phylum Cnidaria. Hexacorallia includes the stony corals and these...
PMID 18850237. S2CID 16969737. British Anthozoa (Coelenterata: Octocorallia and Hexacorallia) Evolution of Metazoan Life Cycles and the Origin of Pelagic Larvae v...
v t e Corals and coral reefs Hexacorallia Black Brain Elegance Hermatypic Chalice Pillar Table Elkhorn Staghorn †Rugose †Tabulate Octocorallia Bamboo Blue...
Gonochorism is thought to be the ancestral state in polychaetes,: 126 hexacorallia,: 74 nematodes,: 62 and hermaphroditic fishes. Gonochorism is thought...
This is a list of European species extinct in the Holocene that covers extinctions from the Holocene epoch, a geologic epoch that began about 11,650 years...
of two clades, Anthozoa and Medusozoa. Anthozoa includes the classes Hexacorallia, the hard corals, and Octocorallia, the soft corals, as well as Ceriantharia...
genus is restricted to the Atlantic Ocean off the coasts of Brazil. Hexacorallia belong to the class Anthozoa, comprising organisms that form polyps with...
the main reef-building Scleractinian corals, which belong to subclass Hexacorallia. Currently only three species are known, one of which is known only from...
(2006). "Morphological and Molecular Revision of Zoanthus (Anthozoa: Hexacorallia) from Southwestern Japan, with Descriptions of Two New Species". Zoological...
(2010). "Four new species and one new genus of zoanthids (Cnidaria, Hexacorallia) from the Galapagos Islands". ZooKeys (42): 1–36. doi:10.3897/zookeys...
(2010). "Four new species and one new genus of zoanthids (Cnidaria, Hexacorallia) from the Galapagos Islands". ZooKeys (42): 1–36. doi:10.3897/zookeys...
phylogenetic reconstruction of the order Actiniaria (Cnidaria, Anthozoa, Hexacorallia) reveals a novel group of hexacorals. Gusmão, ,L.C., Berniker, L., V...
(2014). "Fast-Evolving Mitochondrial DNA in Ceriantharia: A Reflection of Hexacorallia Paraphyly?". PLOS ONE. 9 (1): e86612. Bibcode:2014PLoSO...986612S. doi:10...
caespitosa, commonly known as cushion coral, is a stony coral of the subclass Hexacorallia. This species forms the only true coral reef in the Mediterranean Sea...
numerous tentacles exceed 8 cm long. The sea anemone, being a member of the Hexacorallia, usually carries tentacles in multiples of six that are positioned in...
phylogenetic reconstruction of the order Actiniaria (Cnidaria, Anthozoa, Hexacorallia) reveals a novel group of hexacorals. PLoS ONE 9(5): e96998. doi:10.1371/journal...
relationships of the Corallimorpharian Paracorynactis hoplites (Anthozoa: Hexacorallia)" (PDF). The Raffles Bulletin of Zoology. 59 (2): 245–250. Archived from...
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