《The Nautiloid Cephalopods of the Pennsylvanian System in the Mid-Continent Region》

Board of Regents3

Table of Contents5

Preface9

Introduction11

Collection Studies12

Stratigraphic Distribution13

Table A.—Virgil, Missouri, and Des Moines Series of the Pennsylvanian14

Table B.—The Big Blue Series14

General Sketch of the Anatomy of Nautilus15

Morphology and Terminology of the Nautiloid Shell20

Glossary of Shell Terminology33

Classification38

Genera to Which American Carboniferous Nautiloids Have Been Erroneously Referred39

Genus Apioceras Fahrenkohl184440

Genus Bisiphytes Denys de Montfort180842

Genus Bolboceras Fahrenkohl184443

Genus Cryptoceras d'Orbigny185044

Genus Cycloceras M'Coy184445

Genus Cyrtoceras Goldfuss183247

Genus Discites (de Haan1825) M'Coy184448

Genus Discitoceras Hyatt188349

Genus Maccoyoceras, n. gen50

Genus Gyroceras de Koninck184452

Genus Loxoceras M'Coy184454

Genus Melia Fischer de Waldheim182957

Genus Nautilus Linné175858

Genus Orthoceras Bruguière178958

Genus Perigrammoceras Foerste192465

Genus Poterioceras M'Coy184465

Genus Protobactrites Hyatt190068

Genus Protocycloceras Hyatt190069

Genus Sactoceras Hyatt188370

Genus Solenoceras Hyatt188371

Genus Thoracoceras Fischer de Waldheim184471

Genus Trigonoceras M'Coy184474

Artificial Key to the Genera of North American Pennsylvanian Nautiloids75

Description of Genera and Species77

Order Nautiloidea Zittel188477

Suborder Cyrtochoanites Hyatt190077

Family Sactoceratidae Troedsson192677

Genus Pseudorthoceras Girty191177

Pseudorthoceras knoxense (McChesney)81

Genus Mooreoceras, n. gen85

Mooreoceras normale, n. sp87

Mooreoceras normale, var. angusticameratum, n. var89

Mooreoceras tuba (Girty)90

Mooreoceras bakeri, n. sp92

Genus Dolorthoceras Miller193194

Dolorthoceras? dubium, n. sp95

Dolorthoceras ciscoense, n. sp96

Genus Euloxoceras, n. gen97

Euloxoceras greenei, n. sp99

Family Actinoceratidae Saemann1854102

Genus Rayonnoceras Croneis1926102

Rayonnoceras huecoense, n. sp103

Suborder Orthochoanites Hyatt1900105

Family Orthoceratidae M'Coy1844105

Genus Brachycycloceras, n. gen105

Brachycycloceras normale, n. sp107

Brachycycloceras crebricinctum (Girty)109

Brachcycloceras kentuckiense, n. sp110

Family Trigonoceratidae Hyatt1883112

Genus Ephippioceras Hyatt1883112

Ephippioceras ferratum (Cox)114

Genus Megaglossoceras, n. gen118

Megaglossoceras montgomeryense (Worthen)120

Megaglossoceras magnum, n. sp120

Megaglossaceras rectilaterale, n. sp125

Megaglossoceras johnsoni, n. sp127

Family Triboloceratidae Hyatt1883128

Genus Coloceras Hyatt1893128

Coloceras hyatti, n. sp132

Coloceras liratum Girty132

Coloceras obsoletum Girty134

Coloceras greenei, n. sp136

Genus Planetoceras Hyatt1893138

Planetoceras bellilineatum, n. sp139

Planetoceras tiltoni, n. sp143

Family Tainoceratidae Hyatt1883145

Genus Tainoceras Hyatt1883145

Tainoceras monilifer, n. sp148

Tainoceras nebrascense, n. sp151

Tainoceras rotundatum, n. sp154

Tainoceras sp155

Genus Temnocheilus M'Coy1844156

Temnocheilus subrectangularis, n. sp160

Temnocheilus johnsoni, n. sp163

Genus Metacoceras Hyatt1883166

Metacoceras sangamonense (Meek and Worthen)170

Metacoceras hayi Hy173

Metacoceras dubium Hy176

Metacoceras cavatiforme Hy178

Metacoceras inconspicuum Hy181

Metacoceras angulatum Sayre184

Metacoceras nodosum, n. sp186

Metacoceras coloradoense, n. sp189

Metacoceras sublaeve, n. sp190

Genus Endolobus Meek and Worthen1865193

Genus Titanoceras Hyatt1883198

Titanoceras ponderosum (Meek)200

Titanoceras illinoiense (McChesney)202

Titanoceras sanandreasense, n. sp204

Titanoceras rectilaterale, n. sp206

Titanoceras ingens, n. sp208

Titanoceras sp210

Genus Coelogasteroceras Hyatt1893211

Coelogasteroceras canaliculatum (Cox)213

Family Koninckioceratidae Hyatt1893215

Genus Domatoceras Hyatt1891215

Domatoceras toddanum (Gurley)218

Domatoceras planovolve (Shumard)220

Domatoceras moorei, n. sp221

Genus Pseudometacoceras, n. gen224

Pseudometacoceras sculptile (Girty)226

Family Solenochilidae Hyatt1893228

Genus Solenochilus Meek and Worthen1870228

Solenochilus kerefordensis, n. sp232

Solenochilus syracusensis, n. sp233

Solenochilus brammeri, n. sp234

Bibliography237

Addendum240