| Streptognathodus 
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| Genus: | †Streptognathodus 
 Stauffer & Plummer 1932 | 
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| Species and subspecies | 
| †Streptognathodus acuminatus†Streptognathodus barskovi†Streptognathodus bellus†Streptognathodus bitteri†Streptognathodus brownvillensis†Streptognathodus chanutensis†Streptognathodus clarki†Streptognathodus clavatulus†Streptognathodus constrictus†Streptognathodus corrugatus†Streptognathodus curvatus†Streptognathodus elongatus†Streptognathodus excelsus†Streptognathodus farmeri†Streptognathodus flangulatus†Streptognathodus fusus†Streptognathodus holmesi†Streptognathodus holtensis†Streptognathodus isolatus†Streptognathodus makhlinae†Streptognathodus minutus†Streptognathodus multinodosus†Streptognathodus pawhuskaensis
†S. pawhuskaensis deflectus
†Streptognathodus postfusus†Streptognathodus rugosus†Streptognathodus ruidus†Streptognathodus simplex†Streptognathodus simulator†Streptognathodus spatulatus†Streptognathodus strigillatus†Streptognathodus subdivisus†Streptognathodus sulcatus†Streptognathodus sulciferus†Streptognathodus virgilicus†Streptognathodus vitali†Streptognathodus wabaunsensis†Streptognathodus walteri†Streptognathodus zethus
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Streptognathodus is an extinct genus of conodonts from the Late Carboniferous to Early Permian.