Isograptus Moberg, 1892

Isograptus caduceus Harris, 1933

Isograptus divergens Harris, 1933

Isograptus forcipiformis (Ruedemann, 1904)

Isograptus gibberulus

Isograptus harrisi Beavis, F C & Beavis, S, 1974

Isograptus imitatus Harris, 1933

Isograptus lunatus Harris, 1933

Isograptus manubriatus (Hall, 1914)

Isograptus maximodivergens Harris, 1933

Isograptus maximus Harris, 1933

Isograptus ovatus (Hall, 1902)

Isograptus pertensus Harris, 1933

Isograptus primulus Harris, 1933

Isograptus subtilis Williams & Stevens, 1988

Isograptus tenuis Harris, 1933

Isograptus velatus Harris, 1933