Classification of the genus Orthograptus
G. †Orthograptus Lapworth 1873
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†Orthograptus eucharis Hall 1865
†Orthograptus fastigatus Davies 1929
†Orthograptus pageanus Elles and Wood 1907
†Orthograptus quadrimucronatus Hall 1865
†Orthograptus ruedemanni Gurley 1896
†Orthograptus spinigerus Elles and Wood 1907
†Orthograptus thorsteinssoni Melchin 1987