Epitonium millecostatum and Coralliophila clathrata: Two Prosobranch Gastropods Symbiotic with Indo-Pacific Palythoa (Coelenterata: Zoanthidae)
Date
1980-01
Authors
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Narrator
Transcriber
Annotator
Journal Title
Journal ISSN
Volume Title
Publisher
University of Hawaii Press
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
Two little known prosobraneh gastropods, the wentletrap
Epitonium millecostatum (Pease 1860-1861) and the muricacean Coralliophila
clathrata (A. Adams 1854), are both obligate symbionts of the colonial
zoanthid sea anemone Palythoa. Data are given on the taxonomy of both
gastropods, and on their symbioses in the Maldive Islands, Sri Lanka
(Ceylon), and the Great Barrier Reef, Australia. Neither species had been
reported previously from any of these regions, and the known range of
C. clathrata is also extended to Zanzibar and the Marquesas Islands.
Coralliophila sugimotonis Kuroda 1930 is shown definitely to be a synonym of
C. clathrata.
Palythoa sloughs off nematocysts and zooxanthellae in its mucus, and both
gastropods ingest this;·they do not ingest the Palythoa tissue or polyps, which
contain sand grains. The feces of the Epitonium consist chiefly of discharged
nematocysts; while those of the Coralliophila consist chiefly of remnants of
zooxanthellae. Both species presumably digest the mucus. The Epitonium also
digests the zooxanthellae, thereby being in part herbivorous, and the
Coralliophila apparently also digests the nematocysts. Both species have small
eggs and a planktotrophic larval stage lasting about a month or more. The
larvae of the two species must have well-developed settlement responses to
Palythoa, which is sparsely and patchily dispersed in shallow water.
Frequencies of the adult gastropods with Palythoa are low.
Description
Keywords
Citation
Robertson R. 1980. Epitonium millecostatum and Coralliophila clathrata: two prosobranch gastropods symbiotic with Indo-Pacific Palythoa (Coelenterata: Zoanthidae). Pac Sci 34(1): 1-17.
Extent
Format
Geographic Location
Time Period
Related To
Related To (URI)
Table of Contents
Rights
Rights Holder
Local Contexts
Collections
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.