NMITA:Neogene Marine Biota of Tropical America

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Thysanus

Thysanus Duncan, 1863

Type Species: Thysanus excentricus Dana, 1863

Morphologic Description: Colony form flabelloid; Centers per series >5; Colony shape massive; Epitheca absent; Budding type intramural; Calice or valley width medium (1.5-10 mm); Costae well-developed; Septal and paliform lobes sometimes paliform; Columella structure trabecular & continuous; Columella weak; Endothecal dissepiments reduced; Wall structure parathecal;

Species (4 total):

	Thysanus corbicula Duncan, 1863
	Thysanus excentricus Duncan, 1863
	Thysanus navicula (Duncan, 1864)
	Thysanus sp.A Budd and Johnson (cc97), 1997

Last updated on June 16, 1998-kgj.