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The Nautilus MBL/WHOl THE NAUTILUS Volume 102 1988 AUTHOR INDEX 154 99 Lee. H. G. 78, Absalao, R. S. Mackie. L 73 Adams, W. F 125 G McKiNSTRY. D M 127 Askew, T. A. 89, 92 McLean, H 99 AUFFENBERG, K 40. 154 J. W. 129 AUFFENBERC, T 40 \1endl. 1 1 MlKKELSEN, P M. BlELER, R. 131 115 Moore, D. R. Boss, K. J. W. 102 p 149 Myers, B. bouchet, 47 o'sullivan, j. B. Collins, T. M 102 Pawlik. R. 47 D'AsARO, C. N 1.34 J. Petit, R. E. 130, 164 DAtiilio, A 106 E. 65 H. 30 Pip, DuShane, 129 36, 110 POLACO, O. J Emerson, VV. K. 92 125 POMPONI, S. .\. Gerberich, a. G. 131 123 RoMER, N. S. Gordon, M. E. III 36, 110 Sage, W E , Haimovicl M. 82 Santos Cruz, R. L. 99 , 92 DOS Harasewych, M. G. 56 Smith, DC 155 Hayek. L. C 54 56 Snyder, MA Hershleb, R. 78 164 Thompson, F. G. Kabat, a. R. 102 73 Vermeij, G. J KiLGOUR, B V\'. NEW TAXA PROPOSED IN VOLUME 102 (1988) GASTROPODA 89 charlestonensis Askew, new species (Pleurotomariidae) Perotrochus 100 McLean. Absalao and Santos Cruz, new species (Turbinidae) Macrarcnc difiilala 102 Wrmeij and Collins, new species (Neritidae) Nerita fortidentala 131 Romer and Moore, new species (Rissoidae) Alvania colombiana 106 shaskyi DAttilio and Myers, new species (Muricidae) Faiartia (Murexiella) 150 Bouchet, new species (Buccinidae) Metula crosnieri 151 new species (Buccinidae) Metula africana Bouchet, 54 Sn\der, new species (Fasciolariidae) Latirus martini 36 Emerson and Sage, new species (Turbinellidae) Vasum Stephana 130 new name (Cancellariidae) Axi'lella Petit 154 Auffenberg and Lee, new species (Terebridae) Terebra imitatrix 78 Hypselostoma holimanae Thompson and Lee, new species (Pupillidae) CEPHALOPODA 82 Eledone gaucha Haimovici, new species (Octopodidae) rHE NAUTILUS Volume 102, Number 1 February 16, 1988 ISSN 0028-1344 A quarterly devoted to malacology. Marine Biological Laboratory LIBRARY FEB 2 4 1988 Woods Hole, Mass. EDITOR-IN-CHIEF Dr. Aurele La Rocque Dr. Geerat J. V'ermeij Dr. M. G. Harasewych Department of Geology Department of Biology Division of Mollusks The Ohio State L'niversitv University of Mar\ land National Museum of Columbus, OH 43210 College Park, MD 20740 Natural History Smithsonian institution Dr. James H. McLean Dr. Gilbert L. Voss Washington, DC 20560 Department of Malacology Division of Biology and Living Los Angeles County Musetim of Resources ASSOCIATE EDITOR Natural History Rosenstiel School of Marine and 900 E.xposition Boulevard Dr. R. Tucker Abbott Atmospheric Science Los Angeles, CA 90007 Universit) of American Maiacoiogists, Inc. Miami P.O. Bo.x 2255 4600 Rickenbacker Causewav Melbourne, FL 32902 Dr. Arthur S. Merrill Miami, FL 33149 % Department of Mollusks CONSULTING EDITORS Museum of Comparative Zoology SUBSCRIPTION INFORMATION Harvard University suKscription rate Dr William K. Emerson The per volimie Cambridge, MA 02138 is for individuals Department of US $20.00 and Living Invertebrates US $30.00 for institutions. Postage Dr. Donald R. Moore outside is The American Museum of the United States an Division of Marine Geologv Natural Historv additional US $2.00 for surface and Geophysics New York, NY 10024 and US $10.00 for air mail. All Rosenstiel School of Marine and orders should be accompanied by Atmospheric Science pavment and sent to: THE Mr. Samuel L. H. Fuller University of Miami 1053 Mapleton .Avenue NAUTILUS, P.O. Box 3430, Silver 4600 Rickenbacker Causeway Spring, 20901. Suffiekl. CT 06078 MD Miami, FL 33149 Dr. Robert Hershler Change of address: Please inform Mr Richard E Petit the publisher of address Division of Mollusks \our new P.O Box 30 at least 6 weeks in advance. All National Museum of North Myrtle Beach, SC 29582 Natural History communications should include both old new addresses (with Smithsonian Institution and Dr. Edward Petuch Washington, DC: 20560 J. zip codes) and state the effective Department of Geology date. P"lorida .Atlantic L'niversitv Dr. Richard S. Houbrick I?6ca Raton,' "Fl' 33431 0028- Division of Mollusks THE NAUTILUS (ISSN is published quarterly National Museum of 1344) by Dr. G. Alan Soleiri Natural History Trophon Corporation, 363 Department of Invertebrates Silver Spring, Smithsonian Institution Crescendo Way, MD Field Museurri o£ Natural Historv Washington, DC 20560 20901. Chicago, IL 60605 Second Class postage paid at Silver Mr. Richard I. Johnson Dr. David H. Stansber\ additional mailing Department of Mollusks Spring, MD and Museum of Zoology Museum of Comparative Zoology offices. The Ohio State Universitv Harvard I'niversity Columbus, OH 43210 Cambridge MA 02138 POSTMASTER; Send address changes to: Dr. Ruth D Turner THE NAUTILUS Department of Mollusks P.O. Box 3430 Museum of Comparative Zoolog\ Silver Spring, MD 20901 Harvard Universit\ Cambridge, MA 02138 THEt^NAUTILUS Volume 102, Number I February 16, 1988 ISSN 0028-1344 CONTENTS Rudiger Bieler Aiiatoni) and reproductive biology of two western Atlantic Paula \1. \likkelsen species of N'itrinellidae, with a case of protandrous hermaphroditism in the Rissoacea Helen DuShane Geographical distribution of some Epitoniidae (Mollusca: Gastropoda) associated with fungiid corals 30 \^ illiam K. Emerson A new species of Vastim (Gastropoda: Turbinellidae) from Salter E. Sage, HI off Somalia 36 Kurt Auffenberg Density, spatial distribution, activity patterns, and biomass Troy Auffenberg of the land snail, Geophoriis bothropoma Moellendorff (Prosobranchia: Helicinidae) 40 Notice 46 Marine Biological Laboratory LIBRARY FEB 24 1988 Woods Hole, Mass. THE NAUTILUS 102(l):l-29, 1988 Page 1 Anatomy and Reproductive Biology of Two Western Atlantic Species of Vitrinellidae, With a Case of Protandrous Hermaphroditism in the Rissoacea Kiidiger Bieler Paula M. Mikkel^en Smithsonian Marine Station Harbor Branch Oceanographic at Link Port Institution 5612 Old Dixie Highway 5600 Old Dixie Highway Ft Pierce, FL 3-1946, USA Ft. Pierce, FL 34946, USA ABSTRACT and studies on the gross morphology of Cochliolepis parasitica Stimpson, 1858 (by Moore, 1972) and C. Two western Atlantic vitrinellids, Cyclostremiscus beauii albicerata Ponder, 1966 (by Ponder, 1966), published (Fischer, 1857) and Circulus texanus (Moore, 1965) new com- information on anatomy is available for only one species bination are redescribed based on a study of live snails from of this family, Circulus striatus (Philippi, 1836) from the burrows of the stomatopod crustacean Lysiosquilla scabri- cauda (Lamarck, 1818). Anatoms and reproductive biology are the eastern Atlantic. Data on Ci. striatus, extensively emphasized, with the first recorded description of spawn and presented by Fretter (1956) and later summarized by larval development in the famiK'. Synon\mies are given, and Fretterand Graham (1962, 1978), were based on material a lectotype is selected for Cy. beauii. Literature data concerning which Fretter and Graham (1978:228) described as "the anatom) are reviewed for the marine near-planispiral risso- only live specimens . obtained by Fretter (1956) from aceans; Vitrinellidae (including Cyclostremiscus and Circulus, the stomach of the starfish Astropecten . dredged on with Circulidae as a synonym) is considered distinct from Tor- sandy bottoms 28-30 m deep in the Gulf of Gascony." nidae. Unusual morphological aspects of Cy. beauii are dis- Thus, the present concept of vitrinellid anatomv' is cussed, including external ciliation patterns, pallial tentacles based mainly on Fretter 's description of a single species, (which are functionalK and morphologically different from striatus, the species of the name-bearing each other), and stomach morpholog>' (with a large posterior Circulus tvpe chamber). Protandrous sequential hermaphroditism in Cy. beauii genus of the nominal family Circulidae (see Discussion, is inferred (for the first time in the Rissoacea) from morpho- below). Discussions of phylogenetic relationships (or s\n- logical evidence of sex change correlated with size. onymies) between families such as Vitrinellidae and Tor- nidae have demonstrated the need for anatomical and Key words: Cyclostremiscus; Circulus; Vitrinellidae; Torni- for Fretter, dae; Rissoacea; systematics; anatomy; hermaphroditism. reproductive data these groups (e.g., 1956; Tavlor & Sohl, 1962; Moore, 1965; Golikov & Starobo- gatov, 1975; Boss, 1982; Graham, 1982; Ponder, in press). INTRODUCTION Studies on two species of western Atlantic N'itrinellidae are reported herein. Populations of Cyclostremiscus Despite the great number of nominal species assigned to beauii (Fischer, 1857) and Circulus texanus (Moore, 1965) the poorK defined, cosmopolitan, marine rissoacean fam- were discovered in Florida in sand-flat burrows of the ily \ itrinellidae Bush, 1897, little is known about the stomatopod crustacean Lysiosquilla scabricauda (La- biology of its members. Their small size, mostly unknown marck, 1818). These burrows are U-shaped and extend habitats, poor representation in collections, and frequent up to 1.5 m into the sediment, with horizontal distances confusion with other small-shelled members of groups of 6-7 m between the two openings; a pair of stomatopods such as Cyclostrematidae Fischer, 1885, Skeneidae Thiele, inhabits each burrow system, maintaining it over long 1929, Turbinidae Rafinesque, 1815, and Tornidae Sacco. periods of time (Serene, 1954; R. B. Manning, personal 1896, may account for the lack of attention paid to this communication). Cyclostremiscus beauii, with a shell family, and why authors who have attempted revisions diameter of 6-8 mm, is one of the largest vitrinellids, a (e.g., Trvon, 1888; Bush, 1897; Melvill, 1906; Pilsbry & fact that facilitated detailed studv of its morphology and Olsson, 1945; Pilsbry & McGinty, 1945a,b, 1946a,b, 1950; anatomy and allowed a test of Fretter s hypothesis that Laseron, 1958; Moore, 1964; Adam & Knudsen, 1969) some of the characters found in the much smaller (2 mm) relied almost entireK' on shell characters to distinguish Circulus striatus are size-related (Fretter, 1956:380). ta.xa on all taxonomic levels. Special emphasis was placed upon characters of the Aside from Pilsbry and McGinty 's (1945a, 1946b) reproductive svstem, for which Moore (1964:18) noted sketches of crawling animals of several nominal genera. "Nothing is known of the reproduction of the famiK b Page 2 THE NAUTILUS, Vol.
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