Composite - mixed images 

External 

External - detail of junction of Zones B and C (face and mantle) 

External - detail of labiate process (rimoportula) 

External - detail of mantle area strutted process (fultoportula) 

External - detail of mantle at first girdle band opening 

External - detail of Zone A (central area) 

External - detail of Zone B (strial area) 

External - detail of Zone C (mantle area) 

External - girdle view - girdle bands 

External - girdle view - whole cell 

External - pattern of girdle band openings 

External - whole valve 

External - whole valve - strongly tilted 

Internal 

Internal - detail of junction of Zones B and C (face and mantle) 

Internal - detail of central area strutted process (fultoportula) 

Internal - detail of labiate process (rimoportula) 

Internal - detail of mantle area strutted process 

internal - detail of Zone B (strial area) 

Internal - detail of Zone C (mantle area) 

Internal - whole valve 

Internal - whole valve - strongly tilted 

Internal detail of mantle at first girdle band opening 

Transmission (LM or TEM) 
