From daemon Wed Dec 1 18:40:48 1999 Received: by net.bio.net (8.9.1a/8.9.1) id SAA06303; Wed, 1 Dec 1999 18:40:48 -0800 (PST) Date: Wed, 1 Dec 1999 18:40:48 -0800 (PST) Message-Id: <199912020240.SAA06303@net.bio.net> To: annelida@net.bio.net Reply-To: annelida@net.bio.net From: Aaron Baldwin Subject: Parasites of Terebellids Dear All, While sorting some benthic samples from the Gulf of Alaska, I found a small (about 1.0 cm long) terebellid polychaete. Attached to the anterior abdominal setigers were two oval masses. The masses were turgid, nearly smooth except some very faint constrictions that may have been segmentation. They were both attached to the left-hand side (looking down on the dorsal surface, buccal tentacles up) of the setigers by a very narrow, short stalk. One (the larger of the two) was attached to the abdominal setiger 1 or 2, while the second was on abdominal setiger 5 or 6. Superficially, these look very much like the externae of Rhizocephalan barnacles (I know that's not what these are, just giving a mental picture). I did not attempt to identify the Terebellid, I am not skilled enough with this family to insure I wouldn't damage the "parasites" in the process. Superficially it looks like the common Thelepus sp. that is found in these same samples. I was wondering if anyone had an idea about what these could be? I thought maybe a copepod, but that's only because more often than not any marine parasite I don't recognize turns out to be a copepod. Thank you- Aaron. Aaron & Laura Baldwin 609 SMC Blvd Sitka, Alaska 99835 -- ANNELIDA LIST Discuss = = talk to all members Server = = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Thu Dec 2 00:19:09 1999 Received: by net.bio.net (8.9.1a/8.9.1) id AAA28974; Thu, 2 Dec 1999 00:19:09 -0800 (PST) Date: Thu, 2 Dec 1999 00:19:09 -0800 (PST) Message-Id: <199912020819.AAA28974@net.bio.net> To: annelida@net.bio.net Reply-To: annelida@net.bio.net From: Helmut ZIBROWIUS Subject: Re: Parasites of Terebellids >While sorting some benthic samples from the Gulf of Alaska, ... >I was wondering if anyone had an idea about what these could be? I >thought maybe a copepod, but that's only because more often than not any >marine parasite I don't recognize turns out to be a copepod. I am not an expert in this matter, but from your general description I would indeed presume that it is a copepod. There should be people around interested in your find. Helmut ZIBROWIUS (Centre d'Oceanologie de Marseille) Station Marine d'Endoume Rue Batterie des Lions 13007 Marseille / France E-MAIL: hzibrowi@com.univ-mrs.fr TEL: within France 0491041624 from abroad +33 491041624 FAX: within France 0491041635 from abroad +33 491041635 -- ANNELIDA Discuss = annelida@net.bio.net = talk to all members Server = biosci-server@net.bio.net = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Thu Dec 2 07:19:12 1999 Received: by net.bio.net (8.9.1a/8.9.1) id HAA01340; Thu, 2 Dec 1999 07:19:12 -0800 (PST) Date: Thu, 2 Dec 1999 07:19:12 -0800 (PST) Message-Id: <199912021519.HAA01340@net.bio.net> To: annelida@net.bio.net Reply-To: annelida@net.bio.net From: Torleif Holthe Subject: Re: Parasites of Terebellids The xenocoelomid copepod Aphanodomus terebellae Levinsen, 1878 has been found on Thelepus cincinatus (Fabricius, 1780) (see Stephensen 1913 or Bresciani & Lutzen 1974) regards Torleif Holthe Museum of Natural -- ANNELIDA Discuss = annelida@net.bio.net = talk to all members Server = biosci-server@net.bio.net = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Thu Dec 2 12:58:48 1999 Received: by net.bio.net (8.9.1a/8.9.1) id MAA15991; Thu, 2 Dec 1999 12:58:48 -0800 (PST) Date: Thu, 2 Dec 1999 12:58:48 -0800 (PST) Message-Id: <199912022058.MAA15991@net.bio.net> To: annelida@net.bio.net From: "James A. Blake" Reply-To: annelida@net.bio.net Subject: Arthur Humes - Re: Parasites of Terebellids Hello friends, In seeing this exchange, and documentation about a copepod parasitic in a polychaete, I am sadly reminded that Dr. Arthur G. Humes, the master of parasitic copepod systematics, passed away in late October at the age of 83. Dr. Humes was here in Woods Hole and to me was a reminder of the long tradition of taxonomic studies in this region. He was the author of more than 250 papers and described over 700 new species of copepods! In a career spanning 60 years, that is an average of 11.7 species per year! To put this in perspective, there are some people out there who are considered taxonomists that will not describe 11 new species in their lifetime. I first met Dr. Humes in the late 1970's. At that time he was Professor and Director of the Boston University Marine Program in Woods Hole. He was major professor of several graduate students including Nancy Maciolek, who did her dissertation on spionid polychaetes. Other students he guided worked on coastal ecology problems and of course, copepods. He was the editor of the Journal of Crustacean Biology for nearly 20 years. As part of various benthic surveys conducted over the years, we often encountered polychaetes that were infested with copepods. Arthur was our "go to" person for information. We gradually supplied him with polychaetes of various families (paraonids, spionids, lumbrinerids, terebellids, etc.) that were obviously parasitized by copepods. One in particular, I remember quite well. It was a large hesionid, Hesiospina vestimentifera, described by me from hydrothermal vents on the Galapagos Rift. The polychaete was the largest specimen I had ever seen of this species and was infested with 30 or more prominent copepods. That specimen along with Dr. Humes entire collection is being transferred to the Smithsonian Institution and will be available for future generations to study. At a time when we desperately need highly trained taxonomists to deal with the growing backlog of biodiversity data, we cannot afford to lose people like Dr. Humes. I feel very privileged to have known him and to have been considered a friend. He will be missed. James A. Blake ENSR Marine & Coastal Center 89 Water Street Woods Hole, Masschusetts 02543 -- ANNELIDA LIST Discuss = = talk to all members Server = = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Thu Dec 2 15:26:18 1999 Received: by net.bio.net (8.9.1a/8.9.1) id PAA04888; Thu, 2 Dec 1999 15:26:18 -0800 (PST) Date: Thu, 2 Dec 1999 15:26:18 -0800 (PST) Message-Id: <199912022326.PAA04888@net.bio.net> To: annelida@net.bio.net From: "Geoff Read" Reply-To: annelida@net.bio.net Organization: NIWA (Nat. Inst. Water & Atmos. Res. NZ) Subject: Re: Arthur Humes - Re: Parasites of Terebellids I thought it appropriate to list some Arthur Humes copepod papers relevant to polychaetes, vestimentifera, echiura. Here is what I've got. Humes, A. G., & A. G. Stock. 1973. A revision of the family Lichomolgidae Kossmann, 1877, cyclopoid copepods mainly associated with marine invertebrates. - Smithsonian Contributions to Zoology, 127(1-368). Humes, A. G. 1975. Cyclopoid copepods associated with marine invertebrates in Mauritius. - Zoological Journal of the Linnean Society, 56:171-181. Humes, A. G., & J. F. Grassle. 1979. Serpulidicola josephellae sp. nov. (Copepoda, Cyclopoida) from a deep-water polychaete west of Ireland. - Crustaceana. (Leiden)., 36(3):309-315 Humes, A. G., & M. Dojiri. 1980. A Siphonostome Copepod Associated With a Vestimentiferan From the Galapagos Rift and the East Pacific Rise. - Proceedings of the Biological Society of Washington, 93(3):697-707. Humes, A. G., & M. Dojiri. 1980. A New Siphonostome Family (Copepoda) Associated With a Vestimentiferan in Deep Water Off California. - Pacific Science 34(2):143-151. Humes, A. G. 1987. Copepoda from deep-sea hydrothermal vents. - Bulletin of Marine Science, 41(3):645-788 Boxshall, G. A., & A. G. Humes. 1987. A new species of Hemicyclops (Copepoda: Poecilostomatoida) associated with an echiuran worm in Hong Kong. - Asian Marine Biology 4:61-66. Humes, A. G. 1988. Copepoda from deep-sea hydrothermal vents and cold seeps. - Hydrobiologia., 167168:549-554. Humes, A. G. 1990. Copepods (Siphonostomatoida) from a deep-sea hydrothermal vent at the Mariana Back-Arc Basin in the Pacific, including a new genus and species. - Journal of Natural History, 24(2):289-304. Humes, A. G., & G. A. Boxshall. 1996. A revision of the lichomolgoid complex (Copepoda: Poecilostomatoida), with the recognition of six new families. - Journal of Natural History, 30:175- 227. -- Geoff Read -- ANNELIDA LIST Discuss = = talk to all members Server = = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Thu Dec 2 16:30:50 1999 Received: by net.bio.net (8.9.1a/8.9.1) id QAA11577; Thu, 2 Dec 1999 16:30:50 -0800 (PST) Date: Thu, 2 Dec 1999 16:30:50 -0800 (PST) Message-Id: <199912030030.QAA11577@net.bio.net> To: annelida@net.bio.net From: "Geoff Read" Reply-To: annelida@net.bio.net Organization: NIWA (Nat. Inst. Water & Atmos. Res. NZ) Subject: Re: Arthur Humes - (correction) > Humes, A. G., & A. G. Stock. 1973. A revision of the family > Lichomolgidae Kossmann, 1877, cyclopoid copepods mainly > associated with marine invertebrates. - Smithsonian Contributions to > Zoology, 127(1-368). Too late an obvious error leaps out at me! Please make that J. H. Stock (who died in 1997). -- Geoff Read -- ANNELIDA LIST Discuss = = talk to all members Server = = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Fri Dec 3 11:29:07 1999 Received: by net.bio.net (8.9.1a/8.9.1) id LAA06408; Fri, 3 Dec 1999 11:29:07 -0800 (PST) Date: Fri, 3 Dec 1999 11:29:07 -0800 (PST) Message-Id: <199912031929.LAA06408@net.bio.net> To: annelida@net.bio.net Reply-To: annelida@net.bio.net From: Claude Jouin-Toulmond Subject: Re: Arthur Humes Other recent references are: Humes A.G. 1997. Siphonostomatoid copepods from deep-sea hydrothermal sites on the mid-Atlantic Ridge west of the Azores. Cahiers de Biologie Marine 34: 63-77. Humes A.G. & M. Segonzac 1998. Copepoda from deep-sea hydrothermal sites and cold seeps: description of a new species of Aphotopotius from the East Pacific Rise and general distribution. Cahiers de Biologie Marine 39: 51-62. According to the list of references in this paper there are several Arthur Humes papers (at least 16) from 1964 to 1998. Claude JOUIN-TOULMOND Executive Editor CBM - Cahiers de Biologie Marine Boîte Postale 74 F29682 Roscoff Cedex, France Tel : 33 2 98 29 23 02 Fax : 33 2 98 29 23 80 -- ANNELIDA Discuss = annelida@net.bio.net = talk to all members Server = biosci-server@net.bio.net = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Fri Dec 3 17:51:29 1999 Received: by net.bio.net (8.9.1a/8.9.1) id RAA18631; Fri, 3 Dec 1999 17:51:29 -0800 (PST) Date: Fri, 3 Dec 1999 17:51:29 -0800 (PST) Message-Id: <199912040151.RAA18631@net.bio.net> To: annelida@net.bio.net From: John Patching Reply-To: annelida@net.bio.net Subject: The 9th Deep-Sea Biology Symposium - Galway Ireland. 2000 Members of this group may be interested to hear of the 9th Deep sea Biology Symposium which will be held in Galway Ireland on 25-30th June 2000. These symposia are only held every three years and provide an ideal opportunity for those with interests in this area to meet their collegues. The theme for the symposium is "The Deep Ocean Biosphere - Change and Sustainability" and it is hoped to feature keynote speakers to address aspects of this topic. As with previous symposia, however, papers and posters on any aspect of deep-sea organisms (from macro to micro) and ecosystems will be welcome. Please remember that " deep- sea" is not only the abyssal benthos but also deep waters and the deep sub-seafloor biosphere. Interdisciplinary papers are particularly encouraged.. I am sure that those of you who have attended previous symposia will agree with me that some of the most interesting ideas have arisen outside the formal sessions. It is my intention to allow time for this, even if it proves necessary to limit the number of oral presentations. There will, of course be the traditional programme of social events including an excursion, and a banquet with plenty of local food and drink It is intended that information om the symposium will be promulgated mainly by electronic means. If you wish to be on the symposium Email list please contact john.patching@nuigalway.ie (Note: do NOT contact this discussion group). If you have colleagues who are interested in the symposium, but do not have access to Email or the internet, please advise them to write to me. The symposium website is at (http://marinemicro.ucg.ie/deepsea.html), and will be updated periodically. Those on the symposium Email list will be sent registration details and notified when the website is updated. John W. Patching The Martin Ryan Marine Science Institute National University of Ireland, Galway Ireland Email: John.Patching@nuigalway.ie Phone: +353-91-750456 Fax: +353-91-525005 -- ANNELIDA Discuss = annelida@net.bio.net = talk to all members Server = biosci-server@net.bio.net = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Sat Dec 4 13:04:08 1999 Received: by net.bio.net (8.9.1a/8.9.1) id NAA23492; Sat, 4 Dec 1999 13:04:08 -0800 (PST) Date: Sat, 4 Dec 1999 13:04:08 -0800 (PST) Message-Id: <199912042104.NAA23492@net.bio.net> To: annelida@net.bio.net Reply-To: annelida@net.bio.net From: Claude Jouin-Toulmond Subject: Re: Parasites of Terebellids The parasitic copepod Xenocoeloma alleni (Brumpt) has been found on the terebellid Polycirrus caliendrum Claparede; here are some references: Bocquet C., Bocquet-Védrine J. & L'Hardy J.-P. 1964. Sur la redécouverte, à Roscoff, de Xenocoeloma alleni (Brumpt) et sur l'existence d'un tégument propre, indépendant de celui de l'hôte Polycirrus caliendrum Claparède, chez ce copépode parasite. Bulletin du Muséum National d'Histoire Naturelle Paris, 36: 622-625. Bocquet C., Bocquet-Védrine J. & L'Hardy J.-P. 1968. Analyse des rapports du copépode parasite Xenocoeloma alleni (Brumpt) et de son hôte Polycirrus caliendrum Claparède. Cahiers de Biologie Marine 9: 285-296. Bocquet C., Bocquet-Védrine J. & L'Hardy J.-P. 1970. Contribution à l'étude du développement des organes génitaux chez Xenocoeloma alleni (Brumpt), copépode parasite de Polycirrus caliendrum Claparède. Cahiers de Biologie Marine 11: 195-208. Caullery M. & Mesnil F. 1919. Xenocoeloma brumpti Caullery & Mesnil, Copépode parasite de Polycirrus arenivorus C. Bulletin Biologique de la France et de la Belgique, 53: 161-233. Claude JOUIN-TOULMOND Executive Editor CBM - Cahiers de Biologie Marine Boîte Postale 74 F29682 Roscoff Cedex, France Tel : 33 2 98 29 23 02 Fax : 33 2 98 29 23 80 -- ANNELIDA Discuss = annelida@net.bio.net = talk to all members Server = biosci-server@net.bio.net = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Wed Dec 8 13:00:38 1999 Received: (from daemon@localhost) by net.bio.net (8.9.1a/8.9.1) id NAA00704; Wed, 8 Dec 1999 13:00:38 -0800 (PST) Date: Wed, 8 Dec 1999 13:00:38 -0800 (PST) Message-Id: <199912082100.NAA00704@net.bio.net> To: annelida@net.bio.net Reply-To: annelida@net.bio.net From: Aaron Baldwin Subject: Re: Parasites of Terebellids Dear All, As a matter of general interest, I thought I post a personal response I recieved from Myles O'Reilly concerning parasites of Terebellids (with author's permission). " Your query regarding the Terebellid parsites was passed on to me by a colleague who subscribes to the Annelida list. I am not a member of the Annelida List and do not know how to post a reply so I thought I would e- mail you directly. (Feel free to post my comments if you wish) " I am a pollution monitoring biologist with about 20 years experince on benthos in UK waters. For 12 years I have been collecting copepod parasites mostly of polychaetes, crustaceans, and molluscs. I published a brief hand guide to Polychaete parasites of UK waters a few years ago plus a few other articles since on polychaete parasites (O'Reilly, 1991, 1995a,1995b,1999). From your brief description of the terebellid parasites I would be fairly confident that they are copepods, either of the family Xenocoelomidae or of the family Melinnacheridae. " The Xenocoelomidae has 2 genera (see Bresciani & Lutzen, 1966) and I have collected both in UK waters: the first contains a single species Aphanodomus terebellae which is endoparasitic in various terebellids, Thelepus being a favourite host. Only a pair of ovisacs protrude from the host. " The second genus Xenocoeloma has 2 very similar species X.alleni, and X.brumpti which are ectoparasites of Polycirrus species. They are oval, about 1-2mm long and devoid of any appendages except a pair of ovisacs when mature. " The Melinnacheridae has 4 described species - Melinnacheres terebellidis and M. steenstrupi both occur on Terebellides stroemi (attached to the body or the gills respectively) while M.ergasiloides lives on Melinna cristata attached to the posterior thoracic segments. (The fourth species is from a deep water terebellid off Mexico) Descriptions of the Terebellides parasites are available in Bresciani, 1961. I have material of both from the North Sea and the west coast of Scotland. I have not seen M.ergasiloides though a good description and figure appear in Bresciani & Lutzen, 1975. " Without seeing your specimen or knowing its host identity I could not be sure where it might fit in. These families remain poorly known and it is possible that you may have a new species or genus. I have several new taxa already in my collection including a bizarre ecto/endoparasite of Jasmineira . I would be happy to examine your parasite if you wish and would be interested to hear about any other copepod parasites you may have come across on invertebrates. All for now Myles O'Reilly References: Bresciani J (1961). The anatomy of a parasitic copepod Saccopsis steenstrupi n.sp. Crustaceana 3:9-23 Bresciani J & Lutzen J (1966). The anatoy of Aphanodomus terebellae with remarks on the family Xenocoelomidae. Bulletin du Museum National D'Histoire Naturelle, Paris. 37(5):787-806. Bresciani J & Lutzen J (1975). Melinnacheres ergasiloides M.Sars, a parasitic copepod of the polychaete Melinna cristata with notes on multiple infections caused by annelidicolous copepods. Ophelia 13:31-41. O'Reilly, M.G. (1991). A guide to polychaete-infesting copepods from British waters. Porcupine Newsletter 5(3):63-70. O'Reilly, M.G. (1995a). A new genus of copepod (Copepoda: Poecilostomatoida) commensal with the maldanid polychaete Rhodine gracilior, with a review of the Family Clausiidae. Journal of Natural History 29:47-64. O'Reilly, M.G. (1995b). Parasitic and commensal Copepoda. In: Benthic biodiversity in the southern Irish sea. A.S.Y. Mackie, P.G. Oliver & E.I.S. Rees, Studies in Marine Biodiversity and Systematics from the National Museum of Wales. BIOMAR Reports, 1:62-69. O'Reilly, M.G. (1999). Notes on copepod parasites of polychaete worms in Scottish waters; including the first UK records of the Californian copepod Spiophanicola spinosus Ho, 1984 (Poecilostomatoida: Spiophanicolidae). Glasgow Naturalist. 23(4):46-47, plate 3. Aaron & Laura Baldwin 609 Saw Mill Creek Blvd Sitka, Alaska 99835 -- ANNELIDA LIST Discuss = = talk to all members Server = = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Wed Dec 8 16:42:16 1999 Received: by net.bio.net (8.9.1a/8.9.1) id QAA25774; Wed, 8 Dec 1999 16:42:16 -0800 (PST) Date: Wed, 8 Dec 1999 16:42:16 -0800 (PST) Message-Id: <199912090042.QAA25774@net.bio.net> To: annelida@net.bio.net From: Jack Pearce Reply-To: annelida@net.bio.net Subject: Re: Parasites of Terebellids Hi all, As long as we are beating polychaete/terebellid parasites to death, has anyone noted pinnotherid crabs with such hosts, facultative or obligatory? I worked with a number of pinnixids in the Friday Harbor area, and at least three spp., P. eburna, occidentalis, and schmitti, occurred with different polychaete spp. I would appreciate reports on such observations. Jack Pearce, North American Editor Marine Pollution Bulletin Buzzards Bay Lab 54 Upland Rd. FAlmouth MA 02540 USA buzbay@cape.com -- ANNELIDA LIST Discuss = = talk to all members Server = = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Wed Dec 8 17:02:57 1999 Received: by net.bio.net (8.9.1a/8.9.1) id RAA28155; Wed, 8 Dec 1999 17:02:57 -0800 (PST) Date: Wed, 8 Dec 1999 17:02:57 -0800 (PST) Message-Id: <199912090102.RAA28155@net.bio.net> To: annelida@net.bio.net From: "Geoff Read" Reply-To: annelida@net.bio.net Organization: NIWA (Nat. Inst. Water & Atmos. Res. NZ) Subject: Re: Parasites of Terebellids We expect to see these very highly modified copepods as conspicuous parasites on the larger polychaetes only, although, as illustrated by a paper I couldn't possibly identify to the list - you'll know it or you won't - not everyone realises what they are if there are no limbs left. However, they can be small and occur on quite small animals, including Spiophanes spp. spionids. The paper below is the stem paper for the 1999 O'Reilly new record of Spiophanicola spinosus listed in Aaron Baldwin's last message. Ho, Ju-shey 1984. New family of poecilostomatoid copepods (Spiophanicolidae) parasitic on polychaetes from southern California, with a phylogenetic analysis of nereicoliform families. - Journal of Crustacean Biology, 4(1):134-146 PS: Can anyone tell me what polychaete Stock (1988, Tropical Zoology 1(2):217-222) found Octophiophora lacertae on? A serpulid? I don't have the journal. -- Geoff Read -- ANNELIDA LIST Discuss = = talk to all members Server = = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html -- From daemon Wed Dec 8 19:39:07 1999 Received: by net.bio.net (8.9.1a/8.9.1) id TAA11873; Wed, 8 Dec 1999 19:39:07 -0800 (PST) Date: Wed, 8 Dec 1999 19:39:07 -0800 (PST) Message-Id: <199912090339.TAA11873@net.bio.net> To: annelida@net.bio.net Reply-To: annelida@net.bio.net From: Aaron Baldwin Subject: Pinnotherid crustacea and polychaetes Jack Pierce & group, I am currently working with two species of Pinnotherid associated with terebellid polychaetes, one possibly undescribed, the other Pinnixa tubicola. These are the only NE Pacific pinnotherids I have found directly associated with polychaetes. I have found P. schmitti & Scleroplax granulata "loosely" associated with Echiurus echiurus (meaning I have found them in cases where they were probably in the burrow with the Echiurus, but I have found both species in bivalve burrows, with at least two species of thalassinid crustacean, and free living). Pinnixa tubicola is probably the most modified of NE Pacific pinnotherids in having a very wide yet very short carapace and very elongate 4th walking legs, presumably to facilitate movement in the terebellid and chaetopterid tubes. - Aaron Aaron & Laura Baldwin 609 Saw Mill Creek Blvd Sitka, Alaska 99835 -- ANNELIDA LIST Discuss = = talk to all members Server = = un/subscribes Archives = http://www.bio.net:80/hypermail/ANNELIDA/ Resources = http://biodiversity.uno.edu/~worms/annelid.html --