Classification of the genus Tachyrhynchus
G. Tachyrhynchus Mörch 1868
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Tachyrhynchus erosus Couthouy 1838
Tachyrhynchus giganteus Bartsch 1911
†Tachyrhynchus perlaqueata Conrad 1841
Tachyrhynchus reticulatus Mighels and Adams 1842
Tachyrhynchus subvenustellus Okutani 1964