A classical case of symbiosis is that of solitary scleractinian corals
(Heterocyathus, Heteropsammia) with a sipunculan in a squat shell which is
overgrown by the coral. There may be supplementary partners in the
association, either with the coral (par example barnacles, ascothoracids,
boring bivalves) or with the sipunculan (polychaetes, bivalves).
Ikeda (1922) and Sato (1930) mentioned a syllid polychaete living
together with the sipunculan Phascolion ikedai Sato, 1930, partner of the
solitary coral Heterocyathus japonicus.
Does somebody know if this syllid has subsequently been identified and
described? In the original papers the syllid is simply mentioned.
Additional question:
Knudsen (1944) reported on an association of 3 partners in a squat
gastropod shell (no coral present in this case) from Indonesia: sipunculan,
syllid and bivalve Jousseaumiella. Here again the syllid first remained
unidentified. Has it been identified later on?
Thanks for any information on this subject!
references:
Ikeda I., 1922. On a case of commensalism between a simple coral and a
sipunculoid [in Japanese]. Dobutsugaku zasshi [Zoological journal], 34:
275-281.
Sato H., 1930. Report on the biological survey of Mutsu Bay. 15.
Sipunculoidea. The Science reports of the Tohoku imperial university, (Ser.
4, biology), 5: 1-40, pl. 1-4.
Knudsen J., 1944. Papers from Dr. Th. Mortensen's Pacific expedition
1914-16. 73. A gephyrean, a polychaete and a bivalve (Jousseaumiella
concharum n. sp.) living together (commensalistically) in the
Indo-Malayan seas. Videnskabelige meddelelser fra dansk naturhistorisk
forening i Kobenhavn, 108: 15-24.
-----------------------------------
Helmut ZIBROWIUS
(Centre d'Oceanologie de Marseille)
Station Marine d'Endoume
Rue Batterie des Lions
13007 Marseille / France
E-MAIL: hzibrowi at com.univ-mrs.fr
TEL: within France 0491041624 from abroad +33 491041624
FAX: within France 0491041635 from abroad +33 491041635
---------------------------------------------------------
-- ANNELIDA LIST
Discuss = <annelida at net.bio.net> = talk to all members
Server = <biosci-server at net.bio.net> = un/subscribes
Archives = http://www.bio.net:80/hypermail/ANNELIDA/
Resources = http://biodiversity.uno.edu/~worms/annelid.html
--
