MEMOIR 3 Middle Pennsylvanian Brachiopods From the Mud Springs Mountains and Derry Hills, New Mexico By JOHN LEONARD GEHRIG 1958 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 Mrs. Georgia L. Lusk .......................................... Superintendent of Public Instruction APPOINTED MEMBERS Robert W. Botts ................................................................................... Albuquerque Holm O. Bursum, Jr ..................................................................................... Socorro Thomas M. Cramer ....................................................................................Carlsbad John N. Mathews, Jr..................................................................................... Socorro Richard A. Matuszeski ........................................................................ Albuquerque Contents Page ABSTRACT .......................................................................................................................................................................1 INTRODUCTION ........................................................................................ ....................................................................1 Nature and purpose of report ............................................................................ …………………………....………….1 Acknowledgments .............................................................................................................. ..........................................1 STRATIGRAPHY .............................................................................................................................................................3 Derry series ...................................................................................................................................................................3 Location .................................................... ..................................................................................... ..........................3 Derry Hills section ................................................. ..................................................................................................3 Des Moines series ..........................................................................................................................................................3 Location ....................................................... ................................ ...........................................................................3 Whiskey Canyon section ......................... ............................................................. ..................................................4 Derry Hills section ....................................................................................................................................................6 Conclusions …………………………………………………………………………………………………………….6 DISTRIBUTION OF FOSSILS IN MEASURED SECTIONS ..........................................................................................7 DISCUSSION OF FAUNA …………………………………………………………………………………......................9 SYSTEMATIC PALEONTOLOGY ................................................................................................................................10 Genus RHIPIDOMELLA Oehlert 1890 …………………………………………………………………………........10 Rhipidomella carbonaria (Swallow) ............................................ .........................................................................10 Genus WELLERELLA Dunbar and Condra 1932 .....................................................................................................10 Wellerella multiplicata, n. sp...................................................................................................................................10 Genus HUSTEDIA Hall and Clarke 1893 ...................................................................................................................10 Hustedia mormoni (Marcou) ..................................................................................................................................10 Genus PUNCTOSPIRIFER North 1920 ......................................................................................................................11 Punctospirifer kentuckiens (Shumard) ...................................................................................................................11 Genus RETICULARIINA Fredericks 1916 ...............................................................................................................11 Reticulariina cf. R. spinosa (Norwood and Pratten) ...............................................................................................11 Genus COMPOSITA Brown 1849 ..............................................................................................................................12 Composita argentea (Shepard) ......................................................................................................................... …..12 Composita derryn, n. sp ................................................................................................................................ .........12 Composita malaya, n. sp .........................................................................................................................................13 Composita ovata Mather ........................................................................................................................................13 Composita subtilita (Hall) ......................................................................................................................................13 Composita sp .................................................................................................................. ........................................14 Genus NEOSPIRIFER Fredericks 1919 .......................................... .........................................................................14 Neospirifer triplicatus (Hall) ................................................... ............................................................. ...............14 Neospirifer triplicatus var. gibbosus Dunbar and Condra ......................................................................................14 Neospirifer cf. N. latus Dunbar and Condra ...........................................................................................................15 Page Genus SPIRIFER Sowerby 1814-18 ............................................................................................................................15 Spirifer occidentalis Girty ........................................................................................................................................15 Spirifer rockymontanus Marcou ...............................................................................................................................16 Genus PHRICODOTHYRIS George 1932 ..................................................................................................................16 Phiricodothyris perplexa (McChesney)…………………………………………………………………………….. 16 Genus BUXTONIA Thomas 1914 ...............................................................................................................................17 Buxtonia? sp..............................................................................................................................................................17 Genus CANCRINELLA Fredericks 1928 ...................................................................................................................17 Cancrinella boonensis (Swallow) .............................................................................................................................17 Genus CHONETES .....................................................................................................................................................17 Chonetes striatus, n. sp..............................................................................................................................................17 Genus DICTYOCLOSTUS Muir-Wood 1928..............................................................................................................18 Dictyoclostus hermosanus (Girty) ..............................................................................................................................18 Dictyoclostus inflatus var. coloradoensis (Girty) ......................................................................................................18 Dictyoclostus morrowensis (Mather) ........................................................................................................................19 Genus ECHINOCONCHUS Dunbar and Condra (1932) ............................................................................................19 Echinoconchus semipunctatus var. knighti Dunbar and Condra ...............................................................................19 Echinoconchus? sp ....................................................................................................................................................20