CONTENTS 



Page 



Introduction 7 



Purpose and scope 7 



Methods of study 7 



Acknowledgments 8 



Stratigraphic summary 8 



Conodont fauna 9 



Abundance of the fauna . 11 



Stratigraphic implications of the fauna 11 



Uniformity of the Glen Dean fauna 12 



Southern faunal province 14 



Conclusions 15 



Systematic descriptions 15 



Genus Cavusgnathus 16 



Cavusgnathus convexa Rexroad 16 



Cavusgnathus cristnta^YdinsGn 3.ndM.e\v\ 16 



Cavusgnathus unicornis Youngquist and Miller 17 



Genus Gnathodus 17 



Gnathodus modocensis Rexroad . 17 



Gnathodus ? sd 18 



Genus Hibbardella 18 



Hibbardella milleri Rexroad, n. sp 18 



Hibbardella ortha Rexroad, n. sp 18 



Genus Hindeodella 19 



Hindeode/la spp 19 



Genus Kladognathus 19 



Kladognathus mehli (Rexroad) 19 



Kladognathus prima (Rexroad) 19 



Genus Lambdagnathus 19 



Lambdagnathus fragilidens Rexroad, n. sp 20 



Genus Ligonodina 21 



Ligonodina hamata Rexroad 21 



Ligonodina obunca Rexroad 21 



Ligonodina roundyi Hass 21 



Genus Lonchodina 22 



Lonchodina furnishi Rexroad, n. sp 22 



Lonchodina paraclaviger Rexroad, n. sp 22 



Lonchodina cf. L. paraclarki Hass 22 



Genus Neoprioniodus 23 



Neoprioniodus camurus Rexroad 23 



Neoprioniodus loxus Rexroad 23 



Neoprioniodus scitulus (Branson and Mehl) 23 



Neoprioniodus varians (Branson and Mehl) 24 



Genus Ozarkodina 24 



Ozarkodina compressa Rexroad 24 



Ozarkodina curvata Rexroad, n. sp 24 



Genus Spatho gnathodus 25 



Spathognathodus campbelli Rexroad 25 



Spathognathodus cristula Youngquist and Miller 25 



Spathognathodus spiculus Youngquist and Miller 25 



Spathognathodus cf. S. commutatus Branson and Mehl 26 



