Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Phylum: Cnidaria
Classis: Anthozoa
Subclassis: Hexacorallia
Ordo: Ceriantharia
Subordo: Spirularia
Familia: Cerianthidae
Genus: Cerianthus
Species (15): C. bathymetricus – C. brasiliensis – C. filiformis – C. incertus – C. japonicus – C. lloydii – C. malakhovi – C. membranaceus – C. mortenseni – C. punctatus – C. roulei – C. sulcatus – C. taedus – C. valdiviae – C. vogti
Name
Cerianthus Delle Chiaje, 1841
References
Links
Cerianthus in the World Register of Marine Species
Cerianthus membranaceus
Cerianthus is a genus of tube-dwelling anemones in the family Cerianthidae. Members of the genus are found worldwide. They are predators, scavengers and omnivores.[2]
Characteristics
Members of this genus do not have a pedal disc with which to hold themselves in position. Instead they live semi-buried in soft substrate surrounded by a parchment-like tube which they secrete. This surrounds the whole anemone up to its crown of tentacles. Sand grains, debris and shell fragments usually stick to the outer side of the tube. When it is disturbed, the anemone retracts swiftly back into the tube. Some of the larger species can have a column of up to 25 inches (640 mm) in length. The longitudinal muscles in the trunk are powerful but the transverse ones are weak. The outer ring of tentacles are long and tapering. The tube is flexible and the anemone can extend its tentacles a surprisingly long way. The inner ring of tentacles surrounds the central mouth and assists in pushing food inside.[2]
Species
The following species are currently included in the genus according to the World Register of Marine Species:[1]
Cerianthus bathymetricus Mosley, 1877
Cerianthus brasiliensis Mello-Leitão, 1919
Cerianthus filiformis Carlgren, 1893
Cerianthus incertus Roule, 1904
Cerianthus japonicus Carlgren, 1924
Cerianthus lloydii Gosse, 1859
Cerianthus malakhovi Molodtsova, 2001
Cerianthus membranaceus (Spallanzani, 1784)
Cerianthus mortenseni Carlgren, 1924
Cerianthus punctatus Uchida, 1979
Cerianthus roulei Carlgren, 1912
Cerianthus sulcatus Kwietniewski, 1898
Cerianthus taedus McMurrich, 1910
Cerianthus valdiviae Carlgren, 1912
Cerianthus vogti Danielssen, 1890
References
van der Land, Jacob (2012). Molodtsova T, Stampar SN (eds.). "Cerianthus Delle Chiaje, 1830". World list of Ceriantharia. World Register of Marine Species. Retrieved 2012-06-30.
Friese, U. Erich (1973). Marine Invertebrates. TFH Publications. p. 163. ISBN 0-87666-105-3.
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