Classification of the genus Triarthrus
G. †Triarthrus Green 1832
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†Triarthrus becki Green 1832
†Triarthrus beckii Green 1832
†Triarthrus billingsi Barrande 1872
†Triarthrus canadensis Smith 1861
†Triarthrus eatoni Hall 1838
†Triarthrus glaber Billings 1859
†Triarthrus huguesensis Foerste 1924
†Triarthrus humilis Hadding 1913
†Triarthrus jachalensis Harrington and Leanza 1957
†Triarthrus linnarssoni Thorslund 1940
†Triarthrus parchaensis Harrington and Leanza 1957
†Triarthrus rougensis Parks 1921
†Triarthrus shinetonensis Raw 1908
†Triarthrus sichuansis Lu and Chang 1974
†Triarthrus skutensis Thorslund 1940
†Triarthrus spinosus Billings 1857
†Triarthrus turkestanicus Veber 1948