Classification of the genus Terrakea

G. †Terrakea Booker 1929
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Terrakea arctica Waterhouse 1971
Terrakea arguta Manankov 1992
Terrakea borealis Ganelin 1977
Terrakea brachythaera Morris 1845
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Invalid names: Productus fragilis Dana 1847 [synonym]
Terrakea dickinsi Dear 1971
Terrakea echinata Manankov 1992
Terrakea elongata Etheridge Jr. and Dun 1909
Terrakea etheridgei Briggs 1998
Terrakea exmoorensis Dear 1971
Terrakea grandis Ganelin 1977
Terrakea hemisphaeroidalis Netschajew 1894
Terrakea japonica Tazawa 2008
Terrakea korkodonensis Licharew 1959
Terrakea minima Solomina 1988
Terrakea nalivkini Grunt 1973
Terrakea pollex Hill 1950
Terrakea quadrata Briggs 1998
Terrakea rylstonensis Briggs 1998
Terrakea vernacula Manankov 1992
Terrakea yanagidai Tazawa 2008
Invalid names: Saetosina Waterhouse 1986 [synonym]