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Epiactis ritteri

(Sandy Anemone)

Common Names

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Common Names in English:

Sandy Anemone

Description

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Physical Description

Species Epiactis ritteri

This anemone has no acontia, no tubercles or major adherent material on the column except near the base (has small adhesive warts whic material sometimes adheres to), may or may not have radiating white lines on the base of the columns (edges of the pedal disk ), usually the column is dull red to brown. It also has broad, radiating white lines on the oral disk , mostly close to the tentacle bases.

This species is extremely flat when contracted . The unusual pale coloration of some individuals may be due to the fact that they are in a sea cave.

Habitat

Usually under rocks in the lower intertidal. Depth Range : Low intertidal (and probably subtidal )

Biology

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Reproduction

This species broods its young internally. The red-orange red eggs are about 1/2 mm in diameter and are fertilized inside the parent. Once they have grown to a size sufficient to have tentacles , they leave the mouth and crawl away. Asexual reproduction is not common.

Taxonomy

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Unambiguous Synonyms

  1. Cnidopus ritteri
  2. Cnidopus ritteri (Torrey)
  3. Cnidopus ritteri (Torrey, 1902)
  4. Epiactis ritteri Torrey

Notes

Name Status: Accepted Name . Synonym: Epiactis ritteri . Latest taxonomic scrutiny: October 15, 2001.

Similar Species

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Epiactis prolifera is usually smaller and has narrow radiating white lines on the oral disk which originate close to the mouth, (the radiating white lines on the edges of the pedal disk come up the column only partially as in this species), and brood their young externally. This species can look superficially like an aposymbiotic Anthopleura elegantissima but its column tubercles are not in vertical rows and A. elegantissima rarely is found this flat.

Members of the genus Epiactis

There are approximately 20 species in this genus:

E. adeliana · E. australiensis · E. brucei · E. fecunda · E. fernaldi (Fernald Brooding Anemone) · E. georgiana · E. incerta · E. irregularis · E. laevisi · E. lisbethae (Giant Brooding Anemone) · E. marsupialis · E. mortenseni · E. neozealandica · E. nordmanni · E. thompsoni · E. prolifera (Brooding Anemone) · E. prolifera prolifera (Brooding Sea Anenome) · E. ritteri (Sandy Anemone) · E. thompsoni · E. vincentina

Bibliography

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More Info

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal February 28, 2008:

Identifiers

Last Revised: 2008-11-04