Contents -- Abstract / Résumé -- Acknowledgements -- Introduction -- Location and regional geology -- Materials and methods -- Previous biostratigraphic studies -- Lithostratigraphy -- Kechika Formation -- Skoki Formation -- Road River Group -- Biostratigraphy -- Conodont biostratigraphy and provinciality -- Preservation of conodont fauna -- Conodont zonation -- Cosmopolitan zones -- Eoconodontus Zone -- Cordylodus proavus Zone -- Iapetognathus Zone -- Midcontinent Realm zones -- Polycostatus falsioneotensis Zone, new -- Rossodus tenuis Zone, new -- Rossodus manitouensis Zone -- Low Diversity Interval -- Scolopodus subrex Zone, new -- Acodus kechikaensis Zone, new -- Oepikodus communis Zone -- Jumudontus gananda Zone, new -- Tripodus laevis Zone -- Atlantic Realm zones -- Cordylodus angulatus Zone -- Paltodus deltifer Zone -- Drepanoistodus nowlani Zone, new -- Acodus deltatus Zone, emended -- Paroistodus proteus Zone -- Paracordylodus gracilis Zone -- Prioniodus elegans Zone -- Oepikodus evae Zone -- Paroistodus originalis Zone -- Paroistodus horridus Zone, new -- Dzikodus tablepointensis Zone, emended -- Distomodus staurognathoides Zone -- Comparison with standard zonations -- Comparison with zonation across the Cambro-Ordovician boundary -- Comparison with standard Midcontinent Realm zonation -- Comparison with standard Atlantic Realm zonation -- Discussion of key evolutionary lineages -- Systematic paleontology -- Introduction -- Order PROCONODONTIDA Sweet -- Family CORDYLODONTIDAE Lindström -- Genus Cordylodus Pander -- Cordylodus angulatus Pander -- Cordylodus caboti Bagnoli, Barnes, and Stevens -- Cordylodus deflexus s. f. Bagnoli, Barnes, and Stevens -- Cordylodus caseyi Druce and Jones -- Cordylodus delicatus n. sp. -- Cordylodus hastatus Barnes -- Cordylodus intermedius Furnish -- Cordylodus lindstromi Druce and Jones.

Cordylodus primitivus Bagnoli, Barnes, and Stevens -- Cordylodus proavus Müller -- Genus Eoconodontus Miller -- Eoconodontus notchpeakensis (Miller) -- Genus Iapetognathus Landing -- Iapetognathus aengensis (Lindström) -- Iapetognathus fluctivagus Nicoll et al. -- Iapetognathus sprakersi Landing et al. -- Iapetognathus sp. -- Family FRYXELLODONTIDAE Miller -- Genus Dzikodus Zhang -- Kallidontus nodosus n. gen. n. sp. -- Kallidontus cf. K. nodosus n. gen. n. sp. -- Kallidontus princeps n. gen. n. sp. -- Kallidontus serratus n. gen. n. sp. -- New genus C, new species -- Family PROCONODONTIDAE Lindström -- Genus Proconodontus Miller -- Proconodontus muelleri Miller -- Order BELODELLIDA Sweet -- Family ANSELLIDAE Fåhræus and Hunter -- Genus Ansella Fåhræus and Hunter -- Ansella jemtlandica (Löfgren) -- Ansella longicuspica Zhang -- Family BELODELLIDAE Khodalevich and Tschernich -- Genus Stolodus (Lindström) -- Stolodus stola (Lindström) -- Genus Walliserodus Serpagli -- Walliserodus costatus Dzik -- Walliserodus ethingtoni (Fåhræus) -- ?Walliserodus nakholmensis (Hamar) -- Order PROTOPANDERODONTIDA Sweet -- Family ACANTHODONTIDAE Lindström -- Genus Acanthodus Furnish -- Acanthodus uncinatus Furnish -- Family CLAVOHAMULIDAE Lindström -- Genus Granatodontus Wang -- Granatodontus cf. G. ani (Wang) -- Family CORNUODONTIDAE Stouge -- Genus Macerodus Fåhræus and Nowlan -- Macerodus? n. sp. A -- Macerodus? n. sp. B -- Family DREPANOISTODONTIDAE Fåhræus and Nowlan -- Genus Drepanoistodus Lindström -- Drepanoistodus amoenus (Lindström) -- Drepanoistodus basiovalis (Sergeeva) -- Drepanoistodus bellburnensis Stouge -- Drepanoistodus concavus (Branson and Mehl) -- Drepanoistodus expansus (Chen and Gong) -- Drepanoistodus forceps (Lindström) -- Drepanoistodus minutus n. sp. -- Drepanoistodus nowlani Ji and Barnes -- Drepanoistodus pervetus Nowlan.

Drepanoistodus cf. D. pitjanti Cooper -- Drepanoistodus suberectus (Branson and Mehl) -- Drepanoistodus n. sp. A -- Drepanoistodus n. sp. B -- Drepanoistodus n. sp. C -- Drepanoistodus n. sp. D -- Drepanoistodus n. sp. E -- Genus Laurentoscandodus Landing, Westrop, and Knox -- Laurentoscandodus sinuosus n. sp. -- Laurentoscandodus cf. L. triangularis (Furnish) -- Genus Paltodus Pander -- ?Paltodus jemtlandicus Löfgren -- Genus Paroistodus Lindström -- Paroistodus horridus (Barnes and Poplawski) -- Paroistodus originalis (Sergeeva) -- Paroistodus parallelus (Pander) -- Paroistodus proteus (Lindström) -- Paroistodus n. sp. -- New genus A -- Family ONEOTODONTIDAE Miller -- Genus Semiacontiodus Miller -- Semiacontiodus nogamii (Miller) -- Semiacontiodus cf. S. cornuformis (Sergeeva) -- Genus Teridontus Miller -- Teridontus gracillimus Nowlan -- Teridontus nakamurai (Nogami) -- Teridontus obesus Ji and Barnes -- Genus Utahconus Miller -- Utahconus longipinnatus Ji and Barnes -- Utahconus utahensis (Miller) -- Family PROTOPANDERODONTIDAE Lindström -- Genus Anodontus Stouge and Bagnoli -- Anodontus longus Stouge and Bagnoli, -- Genus Colaptoconus Kennedy -- Colaptoconus bolites (Repetski) -- Colaptoconus floweri (Repetski) -- Colaptoconus greypeakensis n. sp. -- Colaptoconus sp. -- Genus Eucharodus Kennedy -- Eucharodus parallelus (Branson and Mehl) -- Genus Juanognathus Serpagli -- Juanognathus jaanussoni Serpagli -- Juanognathus variabilis Serpagli -- Genus Parapanderodus Stouge -- Parapanderodus striatus (Graves and Ellison) -- Genus Planusodus n. gen. -- Planusodus gradus n. gen. n. sp. -- Genus Polycostatus Ji and Barnes -- Polycostatus falsioneotensis Ji and Barnes -- Polycostatus cf. P. sulcatus (Furnish) -- Genus Protopanderodus Lindström -- Protopanderodus calceatus Bagnoli and Stouge -- Protopanderodus cooperi (Sweet and Bergström).

Protopanderodus gradatus Serpagli -- Protopanderodus leonardii Serpagli -- Protopanderodus rectus (Lindström) -- Protopanderodus robustus (Hadding) -- Protopanderodus varicostatus (Sweet and Bergström) -- Genus Scolopodus Pander -- Scolopodus amplus n. sp. -- Scolopodus krummi (Lehnert) -- Scolopodus subrex Ji and Barnes -- Genus Striatodontus Ji and Barnes -- Striatodontus prolificus Ji and Barnes -- Striatodontus strigatus n. sp. -- Genus Stultodontus Ji and Barnes -- Stultodontus costatus (Ethington and Brand) -- ?Stultodontus sp. -- Genus Variabiloconus Landing et al. -- Variabiloconus bassleri (Furnish) -- Genus Ventricodus n. gen. -- Ventricodus spurius (Ethington and Clark) -- Order PANDERODONTIDA Sweet -- Family PANDERODONTIDAE Lindström -- Genus Panderodus Ethington -- Panderodus unicostatus (Branson and Mehl) -- Order PRIONIODONTIDA Dzik -- Family ACODONTIDAE Dzik -- Genus Acodus Pander -- Acodus deltatus Lindström -- Acodus kechikaensis n. sp. -- Acodus longibasis McTavish -- Acodus neodeltatus n. sp. -- Acodus oneotensis Furnish -- Acodus quentinensis n. sp. -- Acodus warensis n. sp. -- Genus Diaphorodus Kennedy -- Diaphorodus russoi (Serpagli) -- ?Diaphorodus n. sp. -- Genus Pteracontiodus Harris and Harris -- Pteracontiodus cryptodens (Mound) -- Genus Triangulodus van Wamel -- Triangulodus akiensis n. sp. -- Genus Tripodus Bradshaw -- Tripodus laevis Bradshaw -- Genus Tropodus Kennedy -- Tropodus australis (Serpagli) -- Tropodus comptus (Branson and Mehl) -- Tropodus sweeti (Serpagli) -- Family DISTOMODONTIDAE Klapper -- Genus Distomodus Branson and Branson -- Distomodus staurognathoides (Walliser) -- Family MULTIOISTODONTIDAE Harris -- Genus Multioistodus Cullison -- Multioistodus compressus? Harris and Harris -- Multioistodus subdentatus Cullison -- Family OISTODONTIDAE Lindström -- Genus Graciloconus n. gen.

Graciloconus concinnus n. gen. n. sp. -- Genus Jumudontus Cooper -- Jumudontus gananda Cooper -- Genus Oistodus Pander -- Oistodus bransoni Ethington and Clark -- Oistodus lanceolatus Pander -- Oistodus multicorrugatus Harris -- Oistodus sp. -- Genus Rossodus Repetski and Ethington -- Rossodus kwadachaensis n. sp. -- Rossodus manitouensis Repetski and Ethington -- Rossodus muskwaensis n. sp. -- Rossodus sheffieldensis n. sp. -- Rossodus subtilis n. sp. -- Rossodus tenuis (Miller) -- Genus Tricostatus Ji and Barnes -- Tricostatus cf. T. glyptus Ji and Barnes -- Tricostatus infundibulum n. sp. -- Tricostatus terilinguis n. sp. -- Family PARACORDYLODONTIDAE Bergström -- Genus Fahraeusodus Stouge and Bagnoli -- Fahraeusodus marathonensis (Bradshaw) -- Genus Oelandodus van Wamel -- Oelandodus elongatus van Wamel -- Genus Paracordylodus Lindström -- Paracordylodus gracilis Lindström -- Genus Protoprioniodus McTavish -- Protoprioniodus aranda Cooper -- Protoprioniodus cowheadensis Stouge and Bagnoli -- Protoprioniodus nyinti Cooper -- Protoprioniodus n. sp. -- Family PERIODONTIDAE Lindström -- Genus Microzarkodina Lindström -- Microzarkodina n. sp. -- Genus Periodon Hadding -- Periodon aculeatus Hadding -- Periodon flabellum (Lindström) -- Periodon selenopsis (Serpagli) -- Family PRIONIODONTIDAE Bassler -- Genus Oepikodus Lindström -- Oepikodus communis (Ethington and Clark) -- Oepikodus evae (Lindström) -- Oepikodus intermedius (Serpagli) -- Oepikodus n. sp. -- Genus Prioniodus Pander -- Prioniodus adami Stouge and Bagnoli -- Prioniodus elegans Pander -- ?Prioniodus n. sp. -- Family RHIPIDOGNATHIDAE Lindström -- Genus Bergstroemognathus Serpagli -- Bergstroemognathus extensus (Graves and Ellison) -- Order PRIONIODINIDA Sweet -- Family CHIROGNATHIDAE Branson and Mehl -- Genus Erraticodon Dzik -- Erraticodon balticus Dzik -- Genus Spinodus Dzik.

Spinodus spinatus (Hadding).