Podocoronis = Crown with feet; ποῦς, κορωνίς.
Tristephanium = Small crown with three rings; τρίς, στεφάνιον.
Tricyclidium = Composed of three small crossed circles; τρίς, κυκλίδιον.
Trissocircus = Composed of three crossed circles; τρισσός, κίρκος.
Trissocyclus = Composed of three crossed rings; τρισσός, κύκλος.