MEMOIR 10 PART I Revision of Buttsoceras PART II Notes on the Michelinoceratida By ROUSSEAU H. FLOWER 1 9 6 2 STATE BUREAU OF MINES AND MINERAL RESOURCES NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY CAMPUS STATION SOCORRO, NEW MEXICO NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY E. J. Workman, President STATE BUREAU OF MINES AND MINERAL RESOURCES Alvin J. Thompson, Director THE REGENTS MEMBERS Ex OFFICIO The Honorable Edwin L. Mechem ........................................ Governor of New Mexico Tom Wiley .......................................................... Superintendent of Public Instruction APPOINTED MEMBERS William G. Abbott ............................................................................................... Hobbs Holm 0. Bursum, Jr. ......................................................................................... Socorro Thomas M. Cramer ......................................................................................... Carlsbad Frank C. DiLuzio ...................................................................................... Albuquerque Eva M. Larrazolo (Mrs. Paul F.) ............................................................... Albuquerque Published October I2, 1962 For Sale by the New Mexico Bureau of Mines & Mineral Resources Campus Station, Socorro, N. Mex.—Price $2.00 Contents PART I REVISION OF BUTTSOCERAS Page ABSTRACT ....................................................................................................................... INTRODUCTION .............................................................................................................................. ACKNOWLEDGMENTS .............................................................................................................................. 2 A NOTE ON SPECIFIC CRITERIA ............................................................................................................ 3 BUTTSOCERAS ULRICH AND FOERSTE .............................................................................................. 3 Buttsoceras williamsi Flower, n. sp. .............................................................................................................. 4 Buttsoceras novemexicanum Flower, n. sp. .................................................................................................... 5 Buttsoceras cf. novemexicanum Flower .......................................................................................................... 7 Buttsoceras adamsi (Butts) ............................................................................................................................. 7 Stratigraphy of Buttsoceras .............................................................................................................................. 8 The problem of Oxfordoceras ......................................................................................................................... 8 MICHELINOCERAS FOERSTE ................................................................................................................ 10 Michelinoceras primum Flower, n. sp. ......................................................................................................... 11 Michelinoceras buttsi Flower, n. sp. ............................................................................................................ 12 Michelinoceras vandiverense (Ulrich, Foerste, Miller, and Unklesbay) .................................................... 12 Michelinoceras (?) richardsi Flower, n. sp 12 FAMILY TROEDSSONELLIDAE KOBAYASHI 1935 ........................................................................ 14 PART II NOTES ON THE MICHELINOCERATIDA ABSTRACT ...................................................................................................................................................... 21 INTRODUCTION 21 ACKNOWLEDGMENT ............................................................................................................................... 21 ORDER MICHELINOCERATIDA............................................................................................................ 22 FAMILY MICHELINOCERATIDAE FLOWER 1945 ......................................................................... 25 SUMMARY OF PREVIOUSLY PROPOSED FAMILIES OF THE MICHELINOCERATIDA ....................................................................................................................... 27 Family Allumettoceratidae Flower, 1946 .............................................................................................. 27 Family Bactritidae Hyatt, 1883 ............................................................................................................... 27 Family Choanoceratidae Miller, 1932 .................................................................................................... 27 Family Clinoceratidae Flower, 1946 ...................................................................................................... 27 Family Cycloceratidae Hyatt, 1893 ........................................................................................................ 27 Family Eskimoceratidae Shimizu and Obata, 1936 ............................................................................. 27 Page Family Geisonoceratidae Zhuravleva, 1959 ....................................................................................... 28 Family Greenlandoceratidae Shimizu and Obata, 1935 ................................................................... 28 Family Hammelloceratidae Shimizu and Obata, 1935 ...................................................................... 28 Family Kionoceratidae Hyatt, 1900 ..................................................................................................... 28 Family Loxoceratidae Hyatt, 1900 ....................................................................................................... 28 Family Mooreoceratidae Shimansky, 1954 ......................................................................................... 29 Family Ohioceratidae Shimizu and Obata, 1935 ............................................................................... 29 Family Orthoceratidae McCoy, 1884 .................................................................................................. 29 Family Orthocerotidae Teichert and Miller, 1936 ............................................................................. 29 Family Pseudorthoceratidae Flower and Caster, 1935 ..................................................................... 29 Family Sactorthoceratidae Flower, 1946 ............................................................................................. 30 Family Sinoceratidae Shimizu and Obata, 1935 ................................................................................ 30 Family Spyroceratidae Shimizu and Obata, 1935 .............................................................................. 30 Family Stereoplasmoceratidae Kobayashi, 1934 ................................................................................ 30 Family Striatoceratide Flower, 1939 (a) ............................................................................................... 31 Family Troedssonoceratidae Kobayashi, 1935 .................................................................................. 31 NEW FAMILY PROPOSALS ..................................................................................................................... 32 Family Proteoceratidae Flower, new family ....................................................................................... 32 Family Offleyoceratidae Flower, new family ...................................................................................... 33 Family Sphooceratidae Flower, new family ........................................................................................ 33 Genus Sphooceras Flower, n. gen. ....................................................................................................... 33 Family Engorthoceratidae Flower, new family .................................................................................. 34 Genus Engorthoceras Flower, n. gen. .................................................................................................. 34 CONTRIBUTIONS TO THE MORPHOLOGY OF SOME M IC H ELINOCERATIDA ................................................................................................................... 35 Orthoceros Brunnich ............................................................................................................................. 35 Orthoceros regularis (Schotheim) ........................................................................................................... 35 Pleurorthoceras Flower, n. gen. 35 Pleurorthoceras clarksvillense (Foerste) ................................................................................................... 35 Pleurorthoceras clarksvillense (Foerste) ................................................................................................... 36 Pleurorthoceras selkirkense (Whiteaves) ................................................................................................. 36 FAMILY DAWSONOCERATIDAE ..................................................................................................... 39 Dawsonoceras Hyatt, 1883 ..................................................................................................................... 39 Dawsonoceras cf.