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E-146, 701 C St. Maps For maps, address mail orders to U.S. Geological Survey, Map Distribution Maps Federal Center, Box 25286 Maps may be purchased over the counter at the U.S. Geologi­ Denver, CO 80225 cal Survey offices where books are sold (all addresses in above list) and at the following Geological Survey offices: Residents of Alaska may order maps from ROLLA, Missouri-1400 Independence Rd. Alaska Distribution Section, U.S. Geological Survey, DENVER, Colorado-Map Distribution, Bldg. 810, Federal New Federal Building - Box 12 Center 101 Twelfth Ave., Fairbanks, AK 99701 FAIRBANKS, Alaska-New Federal Bldg., 101 Twelfth Ave. Tertiary Marine Pelecypods of California and Baja California Lucinidae through Chamidae By ELLEN JAMES MOORE PALEONTOLOGY OF CALIFORNIA AND BAJA CALIFORNIA U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1228-D A total of 63 species and subspecies representing 25 genera in the families Lucinidae, Thyasindae, Ungulinidae, and Chamidae are illustrated, taxonomy revised and updated, geographic and geologic ranges given, occurrence by geologic formation cited, and habitat included when it can be confidently inferred UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1988 DEPARTMENT OF THE INTERIOR DONALD PAUL MODEL, Secretary U.S. GEOLOGICAL SURVEY Dallas L. Peck, Director Library of Congress Cataloging-in-Publication Data Moore, Ellen James. Tertiary marine pelecypods of California and Baja California. (Paleontology of California and Baja California) (U.S. Geological Survey professional paper ; 1228-D) Bibliography: p. D34 Includes index. Supt. of Docs, no.: I 19.16:1228-D 1. Bivalvia, Fossil. 2. Paleontology Tertiary. 3. Paleontology California. 4. Paleontology Mexico Baja Califor­ nia. I. Title. II. Series. III. Series: Geological Survey professional paper ; 1228 D. QE811.M635 1988 564M1'09794 88-600027 For sale by the Books and Open-File Reports Section, U.S. Geological Survey, Federal Center, Box 25425, Denver, CO 80225 CONTENTS Genus Claibomites Continued Page Abstract --------------------------- Dl Subgenus Codalucina --------------- D20 Introduction ------------------------- 1 Genus Gibbolucina ------------------ 20 Purpose and scope --------------------- 1 Subgenus Eomiltha ---------------- 20 Procedure ------------------------- 1 Subgenus Eomilthal --------------- 21 Acknowledgments --------------------- 6 Genus Myrtucina ------------------ 21 Abbreviations ----------------------- 6 Genus Pegophysema ----------------- 21 Systematics: Pelecypods Continued from Chapter C ----- 7 Subgenus Pegophysema -------------- 21 Family Lucinidae --------------------- 7 Subfamily Divaricellinae ---------------- 22 Subfamily Lucininae ------------------ 7 Genus Divaricella ------------------ 22 Genus Lucina -------------------- 7 Genus Divaricellal ----------------- 22 Subgenus Lucina ----------------- 7 Subgenus Egracina ---------------- 22 Subgenus Lucinisca --------------- 9 Subgenus Egracinal --------------- 22 Genus Lucinal ------------------- 10 Genus Divalinga ------------------- 22 Subgenus Lucinal ---------------- 10 Subgenus Divalinga --------------- 22 Genus Callucina ------------------- 10 Family Lucinidae? --------------------- 23 Subgenus Callucina --------------- 10 Genus uncertain -------------------- 23 Genus Codakia ------------------- 11 Family Thyasiridae ______________ 24 Subgenus Codakia ---------------- 11 Genus Thyasira ______________ 24 Subgenus Epilucina --------------- 11 Subgenus Thyasira ______________ 24 Genus Ctena --------------------- 12 Subgenus Conchocele ______________ 24 Subgenus Ctena ----------------- 12 Genus Adontorhina - - ______________ 25 Genus Here --------------------- 12 Genus Axinopsida - - ______________ 25 Subgenus Here ------------------ 12 Family Ungulinidae ______________ 26 Genus Linga -------------------- 13 Genus Bruetia ______________ 26 Subgenus Pleurolucina -------------- 13 Genus Bruetia! --------------------- 26 Genus Parvilucina ----------------- 14 Genus Diplodonta ------------------- 26 Subgenus Parvilucina -------------- 14 Subgenus Diplodonta ---------------- 26 Genus Anodontia ------------------ 15 Subgenus Zemysina ----------------- 28 Subgenus Awodowim --------------- 15 Genus Felaniella -------------------- 28 Genus Anodontial ------------------ 16 Subgenus Felaniella ----------------- 28 Subgenus Anodontia'! --------------- 16 Family Chamidae --------------------- 30 Subfamily Myrteinae ------------------ 16 Genus Chama --------------------- 30 Genus Myrtea -------------------- 16 Subgenus Chama ------------------ 30 Subgenus Myrtea ----------------- 16 Subgenus Chamal ------------------ 31 Genus Lucinoma ------------------- 16 Genus Arcinella -------------------- 31 Subfamily Milthinae ------------------ 17 Genus Pseudochama ------------------ 31 Genus Miltha -------------------- 17 Subgenus Pseudochama --------------- 32 Subgenus Miltha ----------------- 18 Fossil localities ------------------------ 32 Subgenus Mil-thai ----------------- 19 Geologic formations cited for occurrence of pelecypods - - - - 33 Genus Claibomites ----------------- 19 References -------------------------- 34 Subgenus Claibomites -------------- 19 Index ----------------------------- 41 ILLUSTRATIONS [Plates follow index] PLATES 1. Lucina, Anodontial, Codakia. 2. Codakia, Ctena, Here. 3. Here, "Lucina", Callucina. 4. Lucinoma, Parvilucina, Lucinal, Myrtea, Linga. 5. Miltha, "Lucina"'. 6. Miltha, Claibomites, Gibbolucina. 7. Gibbolucina, Claibomites, Myrtucina, Thyasira, Divaricellal, Divalinga, Lucina, Diplodonta, "Lucina' 8. Diplodonta, Axinopsida, Bruetial, Felaniella. 9. Felaniella, Chama, Miltha, Pseudochama. 10. Chama, Pseudochama, Felaniella, Arcinella. 11. Chama, "Lucina", Axinopsida, Pseudochama, Pegophysema, Adontorhina. Ill IV CONTENTS Page FIGURES 1. Divisions used in California for geographic ranges of species of pelecypods, Lucinidae through Chamidae - - -- D2 2. Divisions used in Baja California Peninsula for geographic ranges of species of pelecypods, Lucinidae through Chamidae ------------------------------------------------- TABLES TABLES 1-5. Geologic and geographic distribution of the genera: c ^. iCLTVIl'U'Cl'YlCi) A.'YlOCiO'YltlCif JvLyTtCCL, Lj^CVyiOTYld^ lultt/tft, {^/L i1f)OT7l'1t S £ vJT v\J\J\J (svbvbl \j\Jj j -"-Ly ' V(AJ\S vivUj^ J. &yUfJf(,y?>t'ff(/\ji> f U vu\Jji b\->U(s(j\Jj;, , LJ tC/U/t't/fcy U/j ±J W/i^vIl>\Jj 4. J. fiyaSITCL) J\.(LOffltOTh/lfyi(jij AXI'YlO'pSICiCLj IjTltGtlCLi t L/l'piOCLO'YltCi, F 6lCL'Yl16llCL _________ 7 8 PALEONTOLOGY OF CALIFORNIA AND BAJA CALIFORNIA TERTIARY MARINE PELECYPODS OF CALIFORNIA AND BAJA