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The Festivus 31 ISSN 0738-9388 N Jj| THE FESTIVUS } A publication of the San Diego Shell Club Volume: XXXI January 14, 1999 Number: 1 CLUB OFFICERS SCIENTIFIC REVIEW BOARD President Terry S. Arnold Rudiger Bieler Vice President Michael L. Mason Field Museum of Natural History, Chicago Secretary (Corres.) Kim Hutsell Henry W. Chaney Secretary (Record.) Silvana Vollero Santa Barbara Museum of Natural History Treasurer Linda L. Hutsell Eugene V. Coan Past President Wes Fanner Research Associate California Academy of Sciences, San Francisco CLUB STAFF Douglas J. Eemisse Historian Bill Romer California State University, Fullerton Librarian Margaret Mulliner William K. Emerson FESTIVUS STAFF American Museum of Natural History, New York Terrence Gosliner Editor Carole M. Hertz M. California Academy Sciences, San Francisco Business Manager Jules Hertz of Photographer David K. Mulliner George L. Kennedy Department of Geological Sciences MEMBERSHIP AND SUBSCRIPTION San Diego State University, Annual dues are payable to San Diego Shell Club. James H. McLean Membership (includes family). Domestic $15.00; Los Angeles County Museum of Natural History Overseas (surface mail): $18.00, (air mail): $30.00; Barry Roth Mexico/ Canada (surface mail): $18.00, (air mail): $20.00. Research Associate Address all correspondence to the San Diego Shell Club, Inc., Santa Barbara Museum of Natural History c/o 3883 Mt. Blackburn Ave., San Diego, CA 92111, USA. Paul Valentich Scott Santa Barbara Museum of Natural History The Festivus is published monthly except December. Emily H. Vokes The publication date appears on the masthead above. Emerita, Tulane University, New Orleans Single copies of this issue: $5.00 plus postage. Website at: http://www.molluscs.net/SanDiegoShell Meeting date: third Thursday, 7:30 PM, Club/index. html Email: [email protected] Room 104, Casa Del Prado, Balboa Park, San Diego PROGRAM Knowing Your Sea Snails The speaker for the evening. Dr. Henry publications, both current and past, both general and Chaney, of the Santa Barbara Museum of Natural specific, which are used to identify marine History, will give us a subjective review of gastropods. Meeting date: 21 January 1999 CONTENTS Club news 2 Not all shells in Baja California are Recent (a new listing of molluscan fossil species from the Mulege Formation and environs) Nancy Schneider 3 1991 low tides for the northern Gulf of California 16 Book News: Taxonomic Atlas of the Benthic Fauna of the Santa Maria Basin and Western Santa Barbara Channel, Volume 8, The Mollusca Pan 1— The Aplacophora, Polyplacophora, Scaphopoda, Bivalvia and Cephalopoda, edited by P. V. Scott & J. A. Blake (reviewed) Rudiger Bieler, reviewer 17 Upcoming malacological meetings 18 Page 2 THE FESTIVUS Vol. XXXI(l): 1999 CLUB NEWS Minutes of the The Annual Club Christmas Dinner Party San Diego Shell Club Meeting - November 19, 1998 The Club’s annual Christmas Party was once again President Wes Farmer called the meeting to order. held at the Sheraton Four Points Hotel on Saturday th The minutes of the October meeting were approved as evening December 5 . Although the turnout was published in The Festivus. The money for the club somewhat smaller than usual, the party was a huge st Christmas party is due by December 1 . The success. announcement was made that the store “The Sea” in San A lovely Christmas tree at the entrance to the room Pedro is closed but still has discounted merchandise. greeted those attending, and the tables were gaily Dave Mulliner offered two hand dredges to anyone who decorated in red and white with centerpieces of wanted them. (They were quickly scooped up.) There Strombus gigas, donated by Don Pisor, and planted with were also books available for sale at the back of the poinsettias. After the social hour, attendees were room with proceeds to benefit the Club library. welcomed by Master of Ceremonies Jules Hertz and Wes presented the slate of officers for 1999: everyone sat down to enjoy a delicious meal President: Terry Arnold; Vice President: Mike Mason; accompanied by wines supplied by the Club and a sinful Corresponding Secretary: Kim Hutsell; Recording chocolate yule log for dessert. Secretary: Silvana Vollero; Treasurer: Linda Hutsell. Following dessert, Jules began the evening program There were no nominations from the floor and the with some very funny stories. He thanked the 1998 candidates were elected unanimously. The installation Club officers for their work and installed the new of officers will be at the Club Christmas Party. board. New president Terry Arnold was presented the Don Shasky introduced the speaker for the evening, gavel and charter members plaque. Wes Farmer, 1998 Daniel Geiger, who discussed the topic of his president, thanked his board and Carole Hertz dissertation, the systematics of the abalone. He spoke announced to the members that The Festivus will enter th about the problems in trying to distinguish species and its 30 year of continuous publication in 1999. She explained the very complex relationships among the thanked the members for their support, especially Dave species in a clear, understandable way. He said that the Mulliner for his excellent photography and helpfulness Haliotidae originated in the Indo-Pacific and he and The Festivus business manager and her husband, mentioned some of the characters that have been used in Jules, for his constant help and encouragement. classifying them such as the number of open holes, their A slide show followed with images shown by Wes roundedness and the radulae. It was interesting to note Farmer, Dave Mulliner and guest Joyce Gemmell. that pea crabs have been found in abalone shells. He Joyce, a former member, showed slides of the early had very fme slides and his program was greatly days in the San Felipe area: downtown San Felipe in the enjoyed by the large audience. 60s, unloading cattle in the water in downtown San Refreshments for the evening were provided by Felipe, the old horrible road to San Luis Gonzaga and Billee Gerrodette (formerly Brown) and Twila & Tom Bahia San Luis Gonzaga. Her stories accompanying the Critchlow, and the winner of the shell drawing was slides were wonderful and were greatly enjoyed. Marge Lindahl. The meeting was adjourned at 8:50 The traditional gift exchange followed with p.m. to enjoy the refreshments, view the shell display members selecting gifts from under the tree - always a and listen to Daniel as he identified the many abalone highlight of the party. It was just a wonderful evening. that were brought in. Silvana Vollero A Shell Collection Donated to the Club Dues are Due A generous donation of the shell collection of the late Doris Brosius, formerly a Club member, was made This is the last issue of The Festivus that you will by her husband George. This large collection will be receive if your dues have not been paid. For amount of sold at Club auction(s) and its proceeds will benefit The dues and Club address, see masthead on the first page. Festivus and other Club projects. Vol. XXXI(l): 1999 THE FESTIVUS Page 3 NOT ALL SHELLS IN BAJA CALIFORNIA ARE RECENT (A New Listing of Molluscan Fossil Species From the Mulege Formation and Environs) NANCY SCHNEIDER 12829 Carriage Road, Poway, California 92064-6045, USA The little town of Mulege, Baja California Sur, Mexico, lies 600 miles south of the California border (Figure 1). It is a desert oasis situated under palms planted by Jesuit missionaries almost 300 years ago. Rio Mulege runs through town and culminates two miles downstream in an estuary where the drowned river mouth meets the Golfo de California. Beautiful and interesting seashells can be found washed up on the beaches and other species may often be observed alive at low tide. But not all of the shells in the Mulege area are Recent! The coastal plain near Mulege represents a late Pleistocene marine terrace that has been dated at approximately 125,000 years B.P. and has been named the Mulege Terrace (Ashby & Minch, 1987). Pleistocene sediments in the Mulege area were deposited in small coastal embayments, similar to the small bays and other indentations now existing along the western shore of the Golfo de California (Durham, 1950). The terrace sediments contain many of the same species of shells that we see living today. The fauna therein indicates a variety of environments, including open rocky shoreline, protected sandy shoreline and estuarine. Horizons of fossiliferous sediments overlying the Mulege Terrace are located several meters above the level of the present day shoreline. On the exposed side of these layers of fossil shells there forms a talus slope resulting from the forces of gravity and erosion. It has been the good fortune of my husband Bill and I to collect, prepare and study a large number of Figure 1. Mexican states of Baja California, Sonora and Sinaloa, specimens from the abundant fossil assemblages in the surrounding the Golfo de California (after Keen, 1971). Pertinent localities are indicated in the text. Mulege area of Baja California Sur on numerous visits over the last fifteen years, often with other curious present day population of marine species living in the cooperating collectors. Beside many happy hours of intertidal and offshore waters of Mulege in the Golfo field collecting which have produced a substantial de California (Figure 2). We are also pleased to now be collection of fossil fauna from these localities, we have able to contribute a new and more extensive listing of enjoyed realizing the very large degree of correlation identified fossil species the between these 125,000 year old fossil species and the from Mulege Terrace and Page 4 THE FESTIVUS Vol. XXXI(l): 1999 from nearby suspected equivalent localities. Three localities for the Mulege Terrace were named by Ashby & Minch (1987) and are included in this report.
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