Classification
Animalia [kingdom]Brachiopoda [phylum]
Articulata [class]
Terebratulida [order]
Terebratulidina [suborder]
Terebratulacea [superfamily]
Cancellothyrididae [family]
Cancellothyridinae [subfamily]
Terebratulina [genus]
Terebratulina retusa [species]